The walls are already painted, and the designer added three frames: which primed molding MLD-027-MG to buy — 14×8 or 20×11 mm

The main mistake in this situation is to open a calculator, divide the total perimeter of the frames by the length of one strip, and order seven pieces. By length, seven strips do cover 16.2 m. By cutting layout without transverse joints, they do not. For six verticals of 1800 mm, six separate strips are needed, and for six horizontals of 900 mm, three more. The working minimum is nine strips; a tenth is needed as a reserve for a test cut, an angle error, or damage during installation.
Primed molding MLD-027-MG: what the buyer gets according to the product card

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Primed molding MLD-027-MG: what the buyer gets according to the card

MLD-027-MG is made of MDF and is supplied with a primed finish called "Prestige". This is not a white finished molding that you can simply take out of the packaging and glue on. The primer creates a prepared base, but the face coating is still chosen and applied by the customer or a painter.
The product card offers two options:

Option	Size, mm	Length	Price as of 28.08.2026	For three frames
Thin	14×8	2600 мм	620 RUB	A more delicate line
Expressive	20×11	2600 мм	770 RUB	More noticeable relief

The average production time for custom orders is stated as 3–7 days. A rigid packaging frame is added to the invoice for 390 RUB. For the ten slats under consideration, packaging norms are not exceeded: one frame is designed for up to 70 items of 14×8 or up to 36 items of 20×11. Before payment, you need to re-check the price, delivery time, and delivery method.
You can order a specific article via the link buy primed molding MLD-027-MG.

MDF molding 14×8 mm: when a thin line looks more convincing

A profile 14 mm wide is suitable when frames should be part of a calm wall architecture, not the main decoration of the room. On an already painted surface, a thin line changes the familiar look of the space less. It is appropriate next to minimalist furniture, narrow casings, thin baseboards, and small rosettes or switches.
The 14×8 mm size does not mean the profile is "almost invisible." The shadow depends on the direction of light, color saturation, and the 8 mm depth. On a dark matte wall, even a narrow protrusion reads clearly. On a light wall with diffused lighting, the line will be softer.
The thin option is reasonable to choose if there is a small section of wall left between the frame and the socket. However, the profile size itself does not replace the compositional offset. You need to apply painter's tape 14 mm wide to the wall and look at the frames from the entrance, from the sofa, and under evening lighting.
Another advantage is the price. Nine slats cost 5,580 RUB, ten cost 6,200 RUB. With the packaging frame, it comes to 5,970 and 6,590 RUB respectively, excluding glue, paint, and delivery.

Our factory also produces:

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MDF molding 20×11 mm: when the frame needs noticeable volume

The 20×11 mm option is wider and deeper. It suits a spacious wall, a large sofa, tall doors, and situations where frames must remain expressive after painting in the base color. Under side lighting, the 11 mm depth creates a more noticeable shadow.
The wide profile requires more careful checking of corners. Any step at the joint and uneven fit are more visible. It also takes up more space between frames and adjacent elements. If the designer left only 30–40 mm to a switch, door trim, or panel edge, full-scale marking is done first.
The price of nine slats is 6,930 RUB, ten cost 7,700 RUB. After adding the frame, it comes to 7,320 and 8,090 RUB. The difference between the spare sets 14×8 and 20×11 is 1,500 RUB. It is small relative to the cost of repainting the wall, so choosing a profile solely for savings is wrong.

Decorative wall molding: how to choose the size not by photo

The product photo shows the shape but not the scale in a specific room. Before purchasing, three rectangles are taped on the wall with painter's tape. For the first option, tape or paper strips 14 mm wide are used, for the second — 20 mm. The marking is left for at least a day and evaluated in daylight and artificial light.
Five relationships need to be checked:

1. the width of the profile to the width of each frame;

2. the distance between adjacent frames;

3. indent from the baseboard and ceiling;

4. relation to the width of the sofa or console;

5. position relative to outlets, sconces, and switches.

If the paper mockup seems too graphic, choose 14×8. If the line disappears next to large furniture, consider 20×11. The most reliable way is to order a set of OMLD-005 molding samples and apply the profile to the wall. It should be confirmed in advance that the required section is included in a specific set: the set card must not be replaced by an assumption.

Three frames 900×1800 mm: why seven MLD-027-MG strips are not enough

Perimeter of one frame:
(900 + 1800) × 2 = 5,400 mm.
Three frames:
5,400 × 3 = 16,200 mm.
Theoretical calculation by total length:
16,200 ÷ 2,600 = 6.23, rounded up — seven slats.
This answer does not account for the lengths of individual parts. For each frame, two verticals of 1800 mm and two horizontals of 900 mm are needed. In total, six parts of 1800 mm and six parts of 900 mm.
From a 2600 mm strip, after a 1800 mm vertical, 800 mm remains. A 900 mm horizontal cannot be made from it. You cannot "add" the missing 100 mm with an inconspicuous piece: a transverse joint on a straight section of primed MDF will require repair and may show after painting.
Rational cutting without direct joints:

• six strips → one 1800 mm vertical each, six remnants of approximately 800 mm each;

• three strips → two 900 mm horizontals each, three remnants of approximately 800 mm each;

• nine strips in total.

The calculation does not account for the loss due to the saw blade width and the precise geometry of the 45° cut. Parts are cut according to the outer or inner size of the frame, depending on the accepted marking. Therefore, the craftsman must create a cutting map before starting work.

Why nine slats remain the minimum even with a large number of remnants

The MLD‑027‑MG calculation has a paradox: after purchasing nine strips, the total remnant looks huge.

Total length of nine slats:

9 × 2600 = 23,400 mm.

Net length of parts for three frames 900×1800 mm, if these dimensions are set by the outer long points:

16,200 mm.

Nominal difference:

23,400 − 16,200 = 7,200 mm.

That is, arithmetically, after cutting, 7.2 m of material remains.

Why can't you order seven slats and "somehow assemble" the frames from a smaller total amount?

Because the remnants are fragmented.

Map of six verticals

Each vertical:

1800 mm.

From one plank:

2600 − 1800 = 800 mm.

Six verticals give six remainders of 800 mm.

Total:

6 × 800 = 4800 mm.

But none of these individual pieces reaches the horizontal of 900 mm.

Map of horizontals

For six horizontals of 900 mm:

from one plank you can get:

900 + 900 = 1800 mm.

There remains about:

800 мм

before accounting for cutting and trimming.

Need three initial planks.

Total again:

• 6 planks for verticals;

• 3 on the horizontal;

• 9 working planks.

Why two 800 mm remnants do not equal one 1600 mm piece

Material cannot be "added arithmetically" without a joint.

If you join two short segments on the straight side of the frame, a transverse seam will appear.

After painting in the wall color, such a seam may show:

• by shadow;

• as a microcrack;

• the difference of putty;

• as a step under side light.

For decorative frames on an already painted wall, solid sides are usually more rational.

What to do with nine remnants of about 800 mm each

They should not be considered useless waste.

They are suitable for:

• test adjustment of the miter saw;

• testing a 45° angle;

• test application of glue;

• selecting the finish paint;

• checking the sanding of the primer;

• testing local touch-up painting;

• making small samples;

• of the future repair of a short section.

But they do not replace a whole spare plank of 2600 mm if a vertical of 1800 mm is mistakenly cut off.

That is why the tenth plank has a completely different function than the nine short leftovers.

900×1800 mm — outer dimension, inner opening, or profile axis: this must be determined before cutting

One of the most dangerous mistakes in ordering frames is writing "900×1800 mm" without specifying what exactly this number measures.

For a profile with a width of 14 or 20 mm, there are at least three possible systems.

Outer frame size

900×1800 mm measured at the extreme outer points of the frame.

Then the lengths of the parts at the long points of the miters:

• horizontal — 900 mm;

• vertical — 1800 mm.

It is on this system that the basic calculation of 16.2 m is based.

Inner opening of the frame

If the designer says that the clear inner field should be 900×1800 mm, the outer dimensions will be larger.

For MLD‑027‑MG 14 mm:

outer width:

900 + 2×14 = 928 mm.

outer height:

1800 + 2×14 = 1828 mm.

For 20 mm:

900 + 2×20 = 940 mm.

1800 + 2×20 = 1840 mm.

These are already different cut lengths.

What happens to the number of slats with an internal size of 900×1800

For 14×8:

vertical along the outer long point is about 1828 mm.

Remainder:

2600 − 1828 = 772 mm.

Horizontal:

928 mm.

It still doesn't fit into the remainder.

For 20×11:

vertical:

1840 mm.

Remainder:

760 mm.

Horizontal:

940 mm.

Still doesn't fit.

Therefore, even if 900×1800 is internal light, the base logic of 6 slats vertically + 3 horizontally = 9 remains.

But the sizes of the cuts and the total footage are already different.

Why the craftsman must record the dimension system directly on the drawing

Phrase:

"frame 900×1800"

insufficient.

You need to:

"outer size at the longest points 900×1800"

or

"internal light 900×1800".

If this is not done, you can order the correct quantity but cut all twelve pieces of each frame to the wrong sizes.

Where is the boundary after which the vertical and horizontal could fit in a single plank

For the base outer dimension:

1800 + 900 = 2700 mm.

This is by:

2700 − 2600 = 100 mm

more than the length of one plank.

That is, a pair of "vertical + horizontal" in one MLD‑027‑MG 2600 mm is fundamentally not achievable.

If the frame dimensions are reduced

For example:

1700 + 800 = 2500 mm.

Theoretically, one plank could already provide one vertical and one horizontal with a nominal remainder of 100 mm before accounting for the cut.

This shows why the rule “need 9 planks” cannot be transferred to any frame.

It is valid specifically for the chosen geometry of 900×1800 mm.

Threshold formula

If the lengths of two adjacent sides at the long points are:

• H;

• W;

then it is possible to obtain them from a single 2600 mm plank only if:

H + W + technological allowance ≤ 2600 mm.

For the 1800×900 project, the condition is already violated without any technological margin.

Comparison of 14×8 and 20×11 mm through frame scale, not just price

Width difference:

20 − 14 = 6 mm.

On the card, this looks like a small value.

On a 900 mm frame, the proportion is more noticeable.

Share of face width in total frame width

For 14 mm:

14 / 900 × 100 ≈ 1,56%.

For 20 mm:

20 / 900 × 100 ≈ 2,22%.

On one side, the difference is only 0.66 percentage points, but on three identical vertical frames, the profile repeats with twelve long sides and forms the entire rhythm of the wall.

Projection of total face area of the profile

This is not paint consumption over the actual convex surface, but only a convenient comparison of scale.

For a total net perimeter of 16.2 m:

14 mm:

16.2 × 0.014 = 0.2268 m².

20 mm:

16.2 × 0.020 = 0.324 m².

Difference in frontal projection:

0.0972 m².

That is, a 20 mm line visually occupies approximately 43% more frontal area than a 14 mm one:

20 / 14 ≈ 1,43.

This explains the difference better than the words "thin" and "thick."

Depth also changes

8 mm versus 11 mm.

The difference:

3 mm.

With side lighting, this affects the shadow.

Therefore, 20×11 differs from 14×8 in two parameters at once:

• width;

• depth.

On a large wall, the effect is more noticeable than one might expect from the price difference of 150 rubles per strip.

Nine or ten strips: how much primed molding to order

Nine strips is the working minimum with precise marking, a functioning tool, and no defects. The tenth is not an arbitrary "10 percent reserve," but a separate whole blank. It is needed if the first corner is used to set up the miter saw, one piece is damaged during transport, or non-parallelism of the floor and ceiling is detected.

Order	14×8 mm	20×11 mm	Frame	Total without delivery
9 planks	5,580 RUB	6,930 RUB	390 rub.	5,970 / 7,320 RUB
10 slats	6,200 RUB	7,700 RUB	390 rub.	6,590 / 8,090 RUB

Leftover 800 mm pieces don't have to be thrown away. They are used to test paint, adhesion, sanding of primer, corner quality, and seam filling method. But these pieces cannot be considered a full reserve for a 1800 mm vertical.

How to mark three frames on an already painted wall before buying molding

Even if the frame sizes are already set as 900×1800 mm, you need to decide where exactly they go on the wall. The buyer often knows the size of the rectangles themselves, but doesn't know:

• the distance between them;

• side margins;

• the height of the bottom line;

• distance to ceiling;

• the connection with the sofa, console, or sconce.

For three identical frames, it is convenient to use a common formula based on the wall width.

Let:

• Wwall — clean wall width;

• F = 900 mm — outer width of one frame;

• g — distance between adjacent frames;

• m — equal side margin on the left and right.

Then:

Wwall = 3×F + 2×g + 2×m.

Example of a 4200 mm wall

Let them leave 180 mm between the frames.

Then:

4200 − 3×900 − 2×180 = 1140 mm.

For the two side margins:

1140 / 2 = 570 mm.

It turns out:

570 margin → 900 frame → 180 gap → 900 → 180 → 900 → 570 margin.

Why this example is useful

It shows that the frame sizes themselves are only part of the composition.

If the designer wants smaller side margins, the gaps can be increased or the frame widths reconsidered.

Alignment with the sofa

If the sofa is, for example, 2400 mm wide, and three frames take up exactly:

3×900 + 2×180 = 3060 mm

from the outer edge of the first to the outer edge of the third, the composition is wider than the sofa.

This may be correct if the task is to decorate the entire wall.

If the frames should visually work strictly above the sofa, a different step or smaller size is needed.

Bottom mark

Frames 1800 mm high do not necessarily start right above the baseboard.

Need to check:

• the height of the sofa back;

• sockets;

• console;

• wall sconce;

• switches.

Why it's better to leave the marking on the wall for at least a day

Painter's tape or paper strips allow you to see:

• scale in the morning;

• evening shadows;

• composition with furniture;

• behavior of 14 and 20 mm under different lighting.

On a designer render, both lines may look almost identical on screen.

On a real wall, the difference is more noticeable.

How to choose 14×8 or 20×11 mm based on viewing distance

Narrow and wide profiles behave differently not only on the wall itself, but also from different points in the room.

Close point 1–1.5 m

14×8 reads clearly enough.

At a short distance, the following are visible:

• the semicircular relief itself;

• shadow;

• angle precision.

20×11 may look more "furniture-like" and massive.

Midpoint 2.5–3.5 m

It is here that is often located:

• sofa;

• the entrance to the living room;

• opposite wall.

14×8 becomes a calmer architectural line.

20×11 retains a noticeable relief.

Far point 5–6 m

On a large living room, a thin frame can partially blend into the wall color.

If the designer wants three vertical fields to be readable from afar, 20×11 has the advantage.

Why a universal distance "for 14 mm" cannot be invented

Perception depends on:

• color;

• light;

• mattness;

• the contrast;

• wall size.

Therefore, viewing distance is used as a test scenario, not a standard.

Already painted wall: three finish strategies for MLD‑027‑MG

After installing the primed profile, there are three fundamentally different finishing strategies.

Strategy A. The profile contrasts with the wall

For example:

• the wall is warm gray;

• the molding is white.

The profile can be painted as much as possible in advance.

After installation, touch up locally:

• angles;

• end faces;

• places of minor repairs.

Plus — no need to strive to perfectly replicate the texture and color of the wall.

Disadvantage — every geometric defect is more visible.

Strategy B. The profile should become "one color with the wall"

This is the most demanding scenario.

If MLD‑027‑MG must literally dissolve into the same enamel, and the wall is already painted, local touch-up may differ:

• in tone;

• gloss;

• in orange peel;

• roller direction.

The most uniform result is often achieved if, after installing the frames, the entire decorative wall surface is repainted from corner to corner.

This is no longer "installation without repainting," but it allows for a unified finish.

Strategy C. Pre-painted profile in the same color code

This approach seems like a compromise.

The profile is painted separately with the same paint, then installed.

Works better if:

• the paint is from the same batch;

• the wall is matte;

• the surface texture is similar;

• the light is soft.

But it does not guarantee an absolute match.

How to choose a strategy

If the owner categorically does not want to repaint the wall, it is better to accept in advance that the profile may differ slightly in texture even with the same color.

If a monolithic neoclassical wall is needed, repainting the entire surface after installation is usually more honest than promising "we'll just touch up the seams and nothing will be visible."

Checking the strength of an already painted base before gluing the frames

The molding itself may be perfect, but the weak point of the project is the layer of old paint.

The mounting adhesive holds the system only as well as the weakest layer between the profile and the wall is strong.

If the paint peels off from the putty, the molding may come off with it.

What to check

• are there any bubbles;

• whether there is any chalky residue;

• whether the coating peels off;

• whether there are any greasy/dusty areas;

• whether there is any moisture.

Simple diagnostic test

In an inconspicuous spot, you can check whether the coating is removed by regular masking tape along with the top layer.

This is not a laboratory adhesion test, but a household indicator of a problem.

If the coating comes off easily, first you need to address the substrate issue.

Why you cannot degrease the wall with an unknown solvent

Allowed:

• change color;

• soften the paint;

• get a matte spot.

The product must be compatible with the specific coating.

KUDO HIGH TACK

Card MLD-027-MG shows it as a related mounting item.

This is a useful reference, but it doesn't replace verification:

• the base;

• finish paint;

• instructions of the adhesive itself;

• method of application.

After choosing the technology, you can include the recommended KUDO HIGH TACK in a separate installation specification.

Why the tenth plank is more useful than a "10% reserve"

For nine working bars, 10% is:

9 × 10% = 0.9 planks.

Piece goods cannot be purchased in quantities of 0.9.

So the real choice is:

• 9 working;

• 10 — one full spare.

What the tenth covers

It can replace:

• erroneous vertical 1800 mm;

• damaged plank;

• a part with an unsuccessful angle;

• a plank that turned out to have a primer defect;

• a side mistakenly cut to the internal dimension instead of the external one.

Why the 800 mm remainder does not replace the tenth plank

If the 1800 mm vertical is ruined, the short remainder is useless.

A whole 2600 mm plank is exactly the insurance for the long side.

When the tenth may be extra

if:

• experienced craftsman;

• all angles are 90° and checked;

• there is a miter saw with an adjusted stop;

• repeat delivery is simple;

• deadlines are not critical.

Then nine is the working minimum.

When I would include the tenth in the order

if:

• the wall is already finished and the cost of rework is high;

• installation is done for the first time;

• the corners are complex;

• the order is located far from the warehouse;

• repeat delivery of the 2600-mm profile is inconvenient.

Already painted wall: can MDF molding be installed without a full repaint

Technically, the profile can be pre-painted separately, then carefully glued on. But you cannot promise a result without a single touch-up. After installation, corner joints, micro-gaps near the wall, and possible glue marks remain. If you fill them after installation, it is difficult to restore an even color only on a narrow strip.
There are three most careful strategies.
First: the molding is painted separately, installed on a contrasting wall, and joints are minimally adjusted. Here, a slight difference in texture is not so noticeable because the profile and wall are initially different.
Second: the profile must match the wall. It is installed, corners and junctions are filled, and then the entire decorative surface is repainted from corner to corner. This gives the most uniform shade and gloss.
Third: local touch-up is acceptable after a test area, if paint from the same batch is preserved, the coating is matte, and light does not emphasize the transition. Even then, the result is evaluated after full drying.
You cannot apply new material to an unknown weak coating. If old paint peels off with the painter's tape, the adhesive will hold the molding no better than the paint itself holds to the substrate.

Mounting adhesive for molding: what to check before purchase

The card shows a related product — buy KUDO HIGH TACK mounting adhesive. But the presence of a recommendation does not automatically answer how many cartridges will be needed. Consumption depends on the diameter and number of strips, actual contact area, wall flatness, and the adhesive instructions.
Before ordering, check the compatibility of the adhesive with MDF, factory primer, the wall's finish paint, and the future profile paint. The test is carried out on a molding offcut and an inconspicuous area or on a test panel. You cannot choose a compound only by high initial tack: the adjustment time, absence of solvents, seam color, and paintability are important.
Mark the profile position on the wall, protect adjacent surfaces, and prepare temporary fixation in advance. The molding must not slide while the adhesive gains strength. The specific holding time is taken from the instructions of the chosen compound.

Primed MDF profile: how to prepare for finish painting

"Prestige primed" means factory preparation, but it does not exempt from incoming inspection. After unpacking, check each strip against the light: for chips on edges, dents, warping, and primer damage. Allow the products to acclimate in a dry room according to the manufacturer's conditions.
Dust the surface. If the final paint technology requires matting, do it with fine abrasive without removing the primer down to MDF. Open cut ends absorb differently, so prepare them separately with a compatible material.
Pay special attention to 45° corners. First, do a dry fit of the entire frame. Only after all four corners match, paint or glue the parts using the chosen technology. Trying to fix geometry with a thick layer of putty makes the corner loose and visible.
Practical manufacturer recommendations are collected on the page learn tips on finishing and installing moldings. They are compared with the instructions of the paint and adhesive manufacturers.

MDF molding or wooden molding MLD-027

MLD-027-MG is chosen when a ready primed profile for opaque painting is needed. If the project requires visible wood texture, the primed MDF card does not solve the task. Then it is worth comparing the wooden molding MLD-027.
Dimensions and prices cannot be transferred between cards. The wooden MLD-027 has its own material options, preparation, and cost. Even a similar semicircular shape does not make the products the same item.
The choice is formulated simply:

• solid enamel in the wall color — primed MLD-027-MG;

• natural or translucent finish — a profile with suitable wood;

• wet or non-standard area — separate check of material and coating suitability;

• radius bending — no straight MDF profile can be considered flexible without direct confirmation from the card.

45° angle: why the side length should be specified by the long or short point

The phrase "cut a vertical 1800 mm" is not precise enough if the frame is assembled with miter joints.

A part with two 45° cuts has:

• long outer point;

• a short inner point.

For a profile width of 14 or 20 mm, the difference between these measurements is noticeable.

If 900×1800 is the outer dimension

Then the long points of the parts should form the outer rectangle:

• horizontal — 900 mm;

• vertical — 1800 mm.

The short inner dimensions will be smaller.

For a profile width of A:

internal light approximately:

Win = 900 − 2A

H_inner = 1800 − 2A

For 14 mm:

900 − 28 = 872 mm

1800 − 28 = 1772 mm

For 20 mm:

900 − 40 = 860 mm

1800 − 40 = 1760 mm

This shows how much the profile itself reduces the internal field with the same external size.

If 900×1800 is the internal light

Then, as shown above, the external dimensions increase:

14 mm:

928 × 1828 mm.

20 mm:

940 × 1840 mm.

Why this matters for choosing 14 or 20 mm

On the same outer frame, the 20 mm profile leaves the inner field narrower by:

By width:

872 − 860 = 12 mm

By height:

1772 − 1760 = 12 mm

relative to the 14 mm version.

Visually, the frame becomes "heavier" not only because of the line itself, but also because the inner field slightly decreases.

How to record the size in the installation sheet

Not:

"frame 900×1800".

But:

"outer size at the long points — 900×1800 mm".

Or:

"inner light — 900×1800 mm".

This is one short phrase that prevents twelve incorrect cuts.

Trial one frame: should you first order three slats

If the wall is already painted and the client is unsure about the scale 14×8 or 20×11, a pilot installation of one frame can be considered.

For one frame 900×1800 mm without direct joints, you need:

• 2 slats for the verticals;

• 1 slat for the two horizontals.

Total:

3 planks.

Cost of one test frame 14×8

3 × 620 = 1,860 rub.

With packaging frame 390 RUB:

2,250 rub.

Before delivery, glue, paint, and labor.

20×11

3 × 770 = 2,310 RUB

With frame:

2,700 RUB

What the pilot frame provides

It shows:

• the actual scale;

• quality of corners;

• adhesion to finished paint;

• the selected color;

• behavior under side lighting;

• whether the entire wall needs repainting or local touch-up is sufficient.

Disadvantage of a separate test order

Repeat delivery.

If after the pilot six or seven more slats are ordered, a second logistics cycle appears.

Therefore, an alternative could be:

• order 10 at once;

• assemble the first frame as a test;

• do not cut the remaining slats until the result is confirmed.

For a project with tight deadlines, this option is often more rational.

How to place three frames strictly parallel on an already finished wall

Even perfect corners of each frame will not save the composition if the three rectangles are at different heights.

Need one common baseline

For example:

• bottom line of all three frames;

• upper;

• the central horizontal line.

It is set with a laser or another precise method.

Why you can't mark each frame "from the floor"

The floor may have a slope.

If the first frame is measured from the floor on the left, and the third on the right, the bottom lines may diverge.

It is better to set one horizontal laser base.

Verticals

Each frame is checked with a plumb line/laser.

Especially if the wall is large and three fields are placed side by side: an error of 2–3 mm on one vertical is noticeable on a long line of 1800 mm.

Diagonals as rectangle control

For a 900×1800 mm frame, the theoretical diagonal is:

√(900² + 1800²) ≈ 2012.5 mm.

If both diagonals of the assembled layout are equal, the rectangle is geometrically controlled.

This does not replace checking with a level, but helps detect skew.

Why the diagonal is useful before glue

Masking tape may visually appear straight, but one corner could be shifted.

Checking the diagonals reveals an error before the primed profile is glued to the finished paint.

What to do with sockets, sconces, and switches inside the three frames

On the finished wall, electrical points are already installed.

Therefore, the decorative grid must adapt to them.

Socket inside the field

If the socket is inside the frame, you need to decide:

• it is centered;

• it relates to the furniture;

• remains a free functional element.

The main thing is that the molding does not run too close to the plate and does not create an accidental narrow strip of wall.

Switch near the vertical

A 20 mm profile takes up more space and creates a deeper shadow.

If the distance from the design line to the switch is only 25–30 mm, the frame may look cramped.

14 mm in such a node may be easier.

Sconce

The frame axis is often aligned with the sconce.

Before cutting, you need to decide:

• sconce centered on the frame;

• between frames;

• above the frame.

Why you can't move the frame just for one outlet

Three frames should remain a system.

If one is shifted by 40 mm relative to the others, the composition may lose symmetry.

Sometimes it is better to change the size of all three or the distance between them.

Acceptance of MLD-027-MG after delivery: how to distribute ten slats before cutting

The source material already includes basic packaging control. For ten slats, it is useful to add distribution by function.

First, select the six best long slats for the verticals

The 1800 mm vertical is the most critical part.

If one slat has local damage at the end, it can sometimes be removed when making the horizontals.

Therefore, the straightest and cleanest slats are assigned to:

• V1–V6.

Three slats for the horizontals

They receive:

• H1/H2;

• H3/H4;

• H5/H6.

Each one leaves a large short remainder.

Tenth

Marked:

R — reserve.

It is not cut into tests until the completion of six verticals.

Why this is better

If you first cut samples from a whole spare plank and then make a mistake on a vertical, there will be no full backup left.

Paint and glue tests are performed on the first 800-mm remainders.

When it is better to compare wooden MLD-027 rather than continue the argument 14×8 vs 20×11

MLD-027-MG solves the task of primed MDF for opaque painting.

If the designer says after the mockup:

"the frame should remain natural oak,"
this is already a different product intent.

In that case, it is worth separately comparing the wooden MLD-027 by its own card and not mixing the characteristics of two SKUs.

Do not:

• buy MLD‑027‑MG;

• try to imitate natural texture;

• mix prices and materials of two cards.

When MLD‑027‑MG remains stronger

If the frame must:

• match the color of the wall;

• get an opaque enamel;

• be a geometric, not a wood-like line;

• to be mounted as part of a painted neoclassical composition.

Then the factory-primed preparation is exactly what fits the task.

When to buy MLD-027-MG 14×8 mm

A thin profile is suitable if the frames should support the interior rather than draw attention away from the furniture. It is justified on a small wall, with narrow gaps, next to a thin baseboard, and in calm modern neoclassicism.
The purchase is reasonable when the 14 mm layout reads well from the main viewpoints, the 8 mm depth does not interfere with outlets and switches, and the craftsman has confirmed cutting nine or ten strips. For painting in the wall color, keep paint from the same batch or plan to refresh the entire surface.

When to order MLD-027-MG 20×11 mm

The 20×11 profile is chosen for a large wall, a tall room, or a composition next to a massive sofa and wide trim. It provides a more noticeable shadow and holds its shape better when painted.

Acceptance of 2600 mm slats: what to check before signing and starting cutting

The long profile is inspected upon receipt together with the packaging frame. First, the condition of the packaging is noted: dents, breaks in the base, signs of moisture, and opening. If there is damage, it is photographed before removing the items and reflected in the carrier's documents. Signing without comments may complicate subsequent confirmation of a transport defect.
The slats are removed onto a flat, dry surface and the quantity, article number, and cross-section are checked. Nine items and one spare must be exactly MLD-027-MG of the selected size, not a similar-looking profile from another card. A tape measure is used to check the length, and a caliper is used to check the control cross-section of several slats. Then the primer is inspected under raking light: looking for chips, pressed areas, scratches, and exposed MDF.
Geometry is assessed not by trying to forcefully press the profile against the wall, but on a flat base. A minor deviation and an acceptable installation method should be evaluated by a specialist; a clearly damaged plank is not automatically turned into short pieces until the issue is resolved with the seller or carrier.
Before installation, the items are stored horizontally with even support, in a dry room protected from water and sudden temperature changes. Ten planks must not be leaned only against a wall at the ends: their own weight and improper support can alter the geometry. Cutting begins only after the entire set is received, the face side is approved, and the cutting map is marked.
The reserve tenth strip should not be immediately spent on samples. For test cuts, first use remnants of about 800 mm from the working cut. The whole blank is kept until the assembly of the last frame: only then it becomes clear whether it was needed to replace a mistakenly cut vertical or a damaged side.

Estimate for one frame and for the entire set: how much it really costs to switch from 14×8 to 20×11 mm

If using the working scheme of three planks per frame, you can compare not only the price of one plank, but also the cost of the finished geometry.

One frame 14×8

Three strips:

3 × 620 = 1,860 rub.

One frame 20×11

3 × 770 = 2,310 RUB

Difference on one frame:

450 RUB

Three frames without a spare bar

14×8:

9 × 620 = 5,580 RUB

20×11:

9 × 770 = 6,930 RUB

The difference:

1,350 RUB

Three frames with one spare plank

14×8:

10 × 620 = 6,200 RUB

20×11:

10 × 770 = 7,700 RUB

The difference:

1,500 RUB

After adding one frame 390 RUB:

• 14×8 — 6,590 RUB;

• 20×11 — 8,090 RUB

What this calculation shows

Switching from a thin to a more pronounced profile increases the cost of the spare set by 1,500 rubles.

Against the background of:

• wall painting;

• sofa;

• master's work;

• delivery;

• possible repainting

this is not the amount for which it is worth choosing a too thin profile if the design task requires 20×11.

And vice versa: there is no point in overpaying for 20×11 just because it is "more solid" if the full-size mockup shows that 14×8 better suits the room.

Selection matrix for 14×8 or 20×11 mm for three frames 900×1800

Condition	14×8 mm	20×11 mm
Small/medium wall	strong candidate	check if it overloads
Large wall and big sofa	Can be too delicate	strong candidate
Frames in wall color	soft shadow	more readable shadow
Little space to sockets/switches	More convenient	requires more air
Strong side light	highlights errors less	shows relief and joints more strongly
Minimalist neoclassicism	usually easier	more architectural
Desire to reduce cost	cheaper	150 RUB more per plank
Need expressiveness from 3–5 m	check with a mockup	more often read, more confident

This table does not replace a real fitting. It helps to understand which option to glue on the wall first.

Installation order of three frames: why it's better to start with the central one

If the composition is symmetrical relative to furniture or a wall, the central frame can serve as the base.

First, the central axis

Determine:

• center of the wall;

• center of the sofa or console;

• center of the middle frame.

Then the side ones

Equal gaps are measured from the middle frame to the left and right.

This reduces the risk that after installing the first left frame, the entire composition will 'shift' toward one corner.

But gluing the central one first is not always mandatory

If the wall has:

• door;

• a protrusion;

• asymmetric furniture,

the base can be another line.

The point is not the specific order of the glue, but a unified coordinate system before installation begins.

Dry assembly of all three

Before applying the glue, it is useful to lay out on the wall:

• painter's tape;

• paper strips;

• or temporarily attach the prepared pieces.

Check the entire composition as a whole.

Do not finalize the first frame until the third one still exists only in the drawing.

When it is better not to buy MLD‑027‑MG for this wall at all

Even after design approval, there are situations where the purchase should be stopped.

The wall does not hold the existing paint

If the coating is peeling, the base is addressed first.

Frame dimensions are not defined as external or internal

Without this, cutting cannot be done safely.

The project requires a bend

MLD‑027‑MG is not declared as a flexible profile in the card.

Frames pass through outlets, sconces, or a furniture unit without a solution

The composition is adjusted first.

The customer does not accept either local or full touch-up painting.

If the profile must match the wall color exactly, but any painting work after installation is prohibited, the result cannot be guaranteed as monolithic.

There is no way to make precise corners.

On three frames:

3 × 4 = 12 corners.

The error repeats twelve times.

If the tool/craftsman cannot consistently produce a clean miter joint, it is better not to turn a finished wall into a training ground.

Final decision tree for MLD‑027‑MG on three frames

Step 1. Is the size 900×1800 determined unambiguously?

• no → clarify the external/internal size;

• Yes → continue.

Step 2. Are 14 and 20 mm mockups made on the wall?

• no → do not select based on the card;

• Yes → continue.

Step 3. Is the cross-section approved?

• 14×8 → calculate at 620 rub.;

• 20×11 → at 770 rub.

Step 4. Is the cutting layout checked?

For solid sides of the project 900×1800:

• 6 planks for verticals;

• 3 on the horizontal;

• minimum 9.

Step 5. Is full insurance of the long side needed?

• yes → 10 slats;

• no → 9.

Step 6. Does the existing paint hold reliably?

• no → prepare the base;

• Yes → continue.

Step 7. Is the finish strategy chosen?

• contrast profile;

• local refinement;

• repainting the entire wall.

Step 8. Are all 12 corners and frame locations marked?

• no → do not cut;

• yes → place the order.

After this sequence buy primed molding MLD-027-MG it can be treated as a calculated set, not as a random number of linear meters.

Final check before payment

Check in one sheet: the selected profile, frame size system, nine or ten slats, vertical and horizontal layout map, finish color, condition of existing paint, number of corners and their cutting method. If after full-size layout the designer changes 14×8 to 20×11, you need to re-check not only the price, but also the internal lighting of the frames, clearances from outlets, and spaces to adjacent elements. Only after this re-check are the quantity and cutting map considered final.

Control after trial assembly

If the first frame is assembled dry and one of the corners requires noticeable correction, do not automatically transfer the original dimensions to the other two. First, record the actual measurement system by long points, the saw setting, and the part numbering order. For three identical frames, repeatability is more important than speed: one corrected reference frame should become a template for the others. This is especially useful on an already painted wall, where each additional fitting with glue or sanding increases the risk of damaging the finished coating.

Frequently asked questions about primed molding MLD-027-MG

What sizes are available in the card?

Two options: 14×8×2600 and 20×11×2600 mm.

What material is the profile made of?

Both options are made of MDF and come with a primed "Prestige" preparation.

Can the factory primer be left without paint?

The primer is a preparatory layer, not a confirmed finish coating. For use, an agreed finish is required.

How many slats are needed for three frames 900×1800 mm?

Without direct joints, nine slats are required. For reserve, it is reasonable to order ten.

Why does the total footage yield seven?

Seven cover 16.2 m in total, but after cutting a vertical 1800 mm, 800 mm remains — less than the horizontal 900 mm.

How much do ten slats cost?

As of 28.08.2026, the 14×8 set cost 6,200 RUB, 20×11 — 7,700 RUB. With the frame — 6,590 and 8,090 RUB excluding delivery, glue, and paint.

Is the packaging frame mandatory?

The card indicates that a rigid frame is added to the order cost for 390 rubles.

Can the profile be glued onto an already painted wall?

Only after checking the strength of the coating and the compatibility of the adhesive. The possibility of avoiding touch-up painting in advance is not guaranteed.

Which option is more noticeable?

20×11 mm creates a wider line and a deeper shadow. The result depends on the color, light, and wall size.

Will 14×8 mm suit a large wall?

It may suit if a delicate composition is required. The decision is made after a full-size mock-up.

Can MLD-027-MG be bent along an arch?

Flexible execution is not stated in the card. A straight MDF profile cannot be considered flexible without manufacturer confirmation.

Do I need to prime the entire molding again?

The factory primer is checked and prepared according to the requirements of the chosen paint. Open ends and repaired areas require separate treatment.

Does the seller cut to size?

The FAQ states that the service of cutting or sawing to size is not provided.

Can I use the 800 mm leftovers?

Yes, for color samples, saw adjustments, and tests. For a 900 mm horizontal, they are insufficient.

Conclusion: first choose the scale, then the cutting layout, and only then place the order.

MLD-027-MG allows adding architectural frames even after the main painting, but a finished wall increases the cost of a mistake. The 14×8 mm profile creates a calmer line and reduces the cost of the kit. The 20×11 mm option works more with volume and shadow. The choice is made not by a picture, but by a mockup on a specific wall.
For three frames of 900×1800 mm, the total length is 16.2 m. Seven slats cover this length only mathematically. Real cutting of solid sides requires nine slats of 2600 mm, and a safe order requires ten. After that, the frame, glue, paint, delivery, and labor are added to the estimate.
If the wall must remain perfectly uniform in color, painting of the entire decorative plane after installation is planned in advance. If a contrasting profile is acceptable, it can be prepared separately, but corners and junctions are still checked on a test area. This procedure turns a late design decision from a risk to the finished renovation into a controlled purchase.