Crown A90V2 polystyrene HIWOOD 90mm x 27mm x 2.0m.

The ceiling crown A90V2 from the South Korean brand HI WOOD is a high-tech product made of high-density polystyrene with increased proportions: height 90mm and compact width 27mm. ThisPolystyrene Cornicelength of 2000mm is designed specifically for rooms with high ceilings from 2.8 to 3.2 meters, where a maximum architectural accent is required with minimal projection onto the ceiling plane. The snow-white smooth surface of the crown creates a powerful transition between the wall and ceiling, giving the interior architectural monumentality and expressive completeness.

The asymmetrical profile design with increased height of 90 millimeters and compact width of only 27 millimeters provides maximum vertical accent with minimal horizontal projection. This makesceiling cornice polystyreneA90V2 the ideal choice for spacious rooms with high ceilings, country houses, apartments with non-standard layouts, commercial spaces, where the product creates a powerful vertical accent matching the scale of high spaces. The classical profile geometry with smooth transitions between relief levels forms a deep play of light and shadow, emphasizing the boundary between planes and creating a visual height increase effect of 15-20 centimeters.

The weight of a two-meter plank is 280-320 grams, making the product significantly lighter than gypsum molding of similar size by 5-7 times and simplifying the installation process. Installation is performed by one person with an assistant to support long planks using polystyrene adhesive (liquid nails). The constructive features of the high profile allow compensating wall irregularities up to 6-8 millimeters without additional leveling, significantly reducing preparatory labor and lowering the overall cost of room finishing.

South Korean brand HI WOOD: leader in polymer molding production

The South Korean company HI WOOD is a globally recognized leader in the production of decorative high-density polystyrene molding, with a reputation built over more than 30 years of presence in the international market of premium-class building and finishing materials. The company's production facilities are located in the industrial zone of Busan, the largest seaport in South Korea and the second largest city in the country, providing logistical advantages for exporting products to 54 countries worldwide, including Russia, CIS countries, Europe, the Middle East, North America, and Australia.

The HI WOOD production complex, covering more than 22,000 square meters, is equipped with modern European extrusion equipment for polymer profiles from leading German and Swiss manufacturers, with computer-controlled extrusion processes, automatic geometric parameter control, and multi-level product quality control. Extrusion lines operate in a continuous 24/7 cycle, ensuring an annual output of more than 25 million linear metersDecorative cornices made of polystyrene, baseboards, moldings, sockets, brackets, pilasters, and other decorative elements for interiors of various styles.

The production philosophy of HI WOOD is based on combining advanced Korean polymer chemistry technologies with classical European architectural proportions, traditions, and canons. The company’s specialists study historical molding samples from museums, palaces, mansions, and estates in Europe, adapting them for production using modern materials and high-precision computer-controlled equipment. All profiles are designed according to the golden ratio and classical architectural canons, ensuring visual harmony of the products in any interior regardless of stylistic direction.

The material of the crown A90V2 is produced using continuous extrusion technology of premium-grade polystyrene raw material from leading global chemical manufacturers, with the use of special modifiers developed in-house, increasing density to 39-43 kg/m³. Closed-pore structure with pore size of 0.08-0.12 millimeters ensures optimal balance between lightweight and mechanical strength of the high-profile product. Molten polymer mass at 190-200 degrees Celsius is extruded through a specially designed high-profile die made of hardened tool steel with geometric accuracy up to 0.02 millimeters, creating a profile with perfectly repeating configuration along the entire length of the two-meter plank without any height or deformation deviations.

Quality control of HI WOOD products is conducted at all stages of the production cycle, from raw material acceptance at the warehouse to packaging of finished products in protective shrink-wrap film with the company logo. Each batch of polystyrene undergoes laboratory testing in the company’s accredited laboratory for compliance with declared characteristics of density, water resistance, mechanical strength, thermal stability, ecological safety, and UV resistance. Finished crowns are controlled for 32 parameters including geometric dimensions with tolerance not exceeding 0.2 millimeters, surface quality without bubbles or bulges, absence of extrusion defects, profile straightness without distortions, and color whiteness stability along the entire length of the product.

HI WOOD’s innovative developments include special additives-modifiers in the polystyrene composition, increasing material density to the level of 39-43 kg/m³ while maintaining product lightness and ease of manual tool processing. This allows creatinginstallation of decorative cornices made of polystyrenewith mechanical strength comparable to premium-grade polyurethane analogs at a cost 50-60 percent lower. UV stabilizers of the latest generation prevent material yellowing under intense sunlight, preserving the original snow-white color throughout the product’s 32-38 year lifespan, even in rooms with large south-facing panoramic windows.

Excellent technical characteristics of the high-profile

Moisture resistance of polystyrene makesPlinth cornices from polystyrene foamA90V2 a universal solution for any rooms including areas with high and extreme humidity. Water absorption coefficient does not exceed 1.5 percent after 24 hours of full immersion in water at 23 degrees Celsius, completely eliminating deformation, swelling, surface layer delamination, or loss of decorative qualities even under extreme humidity conditions in bathrooms, pools, saunas. The product maintains stable geometric dimensions within a relative humidity range of 5 to 98 percent, allowing its use in any climate zone from arid steppes to humid coastal regions with high humidity.

Polystyrene’s temperature stability ensures flawless operation in a range from minus 45 to plus 85 degrees Celsius without changes in material’s physical-mechanical properties, profile geometry, or surface color parameters. The crown does not crack during freezing, typical for unheated country houses in winter in Siberia, Far East, and Arctic regions, and does not deform during heat in overheated attics and roof spaces in summer in southern Russian regions. The linear thermal expansion coefficient is 0.07 mm/m per degree, which at a plank length of 2000 millimeters results in a size change of only 0.14 millimeters over a 20-degree temperature difference, practically eliminating thermal deformations and crack formation at plank joints.

Mechanical strength of high-density polystyrene is achieved through an optimized molecular structure with increased polymer chain concentration and special strengthening additives of the new generation. Bending strength limit is 2.7-3.1 MPa, ensuring high reliability of the high-profile product during transportation, vertical storage, and installation at height. Crown A90V2 withstands moderate mechanical loads without forming dents, chips, or cracks even from accidental impacts during renovation work or transportation under careless handling. The material’s elasticity allows compensating wall irregularities up to 6-8 millimeters without additional leveling with plaster or multi-layer putty.

Ecological safety of polystyrene is confirmed by international quality certificates ISO 9001:2015, ISO 14001:2015, and sanitary-hygienic conclusions from Russian regulatory bodies Rosconsumnadzor and the Federal Center for Hygiene and Epidemiology. The material does not contain toxic components, formaldehyde, phenols, heavy metals, volatile organic compounds, asbestos, styrene, or other harmful substances that could negatively affect human health or the environment. Under normal operating conditions and up to 85 degrees Celsius, polystyrene maintains full chemical stability and does not emit any substances into the environment. The hypoallergenic nature of the material allows using crowns in children’s rooms, bedrooms, medical facilities, kindergartens, schools, sanatoriums, and nursing homes without any restrictions.

Chemical inertness of polystyrene ensures compatibility with a wide range of finishing materials and adhesives of various purposes and chemical compositions. The crown is resistant to weak alkalis up to 5 percent concentration, found in cement and gypsum putties, low-concentration acids, salt solutions, and most household detergents based on surfactants. The material does not undergo chemical reactions with water-dispersed paints on acrylic, latex, silicone bases, alkyd enamels, polyurethane varnishes, silicone and acrylic sealants, significantly expanding the possibilities for final finishing and decorating the product according to the designer’s concept.

Universal application in interiors with high ceilings

Spacious living rooms and halls with ceiling heights of 2.9-3.2 meters represent an ideal application sphere for the high-profile crown A90V2. Rooms with areas of 28-45 square meters benefit from installing a 90-millimeter high profile, which creates a powerful architectural accent matching the scale of high spaces without visually reducing height. Compact width of only 27 millimeters minimizes loss of useful ceiling area, which is especially relevant in rooms with suspended ceilings, where every centimeter of perimeter affects the final area and cost of the fabric.

Country houses and cottages with non-standard ceiling heights of 3.0-3.5 meters require expressive decorative elements of maximum scale. The 90-millimeter high crown A90V2 creates a noticeable vertical accent, visually structuring the space of large open-plan rooms. The high profile emphasizes the premium status of country real estate, forming a sense of monumentality and respectability, matching the expectations of owners of elite real estate.

Apartments with free layouts in modern business-class residential complexes with ceiling heights of 3.0-3.2 meters use crown A90V2 for visual zoning of space without physical partitions. Installing a high crown along the perimeter of functional zones creates a visual boundary at ceiling level, delicately separating the living room, dining room, kitchen, and office while maintaining open space. Different coloring of crowns in different zones enhances the zoning effect without disrupting the overall interior stylistic concept.

Commercial spaces in Class A office centers with ceiling heights of 3.2-3.6 meters require representative finishing matching the status of tenants. Crown A90V2 creates a powerful architectural accent in lobbies, meeting rooms, and executive offices, forming a sense of solidity and business success. The high profile visually structures the space of high rooms, creating a clear horizontal line at the wall-ceiling junction.

Premium segment restaurants and banquet halls with ceiling heights of 3.0-4.0 meters use crown A90V2 to create a respectable atmosphere matching the high level of the establishment. The 90-millimeter high profile forms an expressive framing of the space, emphasizing the interior’s status. The possibility of organizing hidden LED lighting in the space between the crown and ceiling creates an impressive decorative lighting effect, enhancing the impression of the interior.

Exhibition halls and art galleries with high ceilings of 3.5-4.5 meters use crown A90V2 to create a neutral architectural framing matching the scale of the space. The high profile creates a clear boundary between wall and ceiling without excessive decoration, preserving focus on the exhibited artworks. The snow-white color serves as a universal background for any artistic objects.

High-profile professional mounting technology

Areas with depressions deeper than 6 mm and cracks wider than 2 mm are filled with gypsum putty such as Knauf Fugen, Volma Shov, Starateli, or professional equivalents, and leveled to the main wall surface using a rubber or metal trowel 120-150 mm wide. After drying for 8-12 hours depending on room temperature and humidity, the surface is sanded with P100-P120 grit sandpaper in circular motions to remove ridges, unevenness, and trowel marks, creating a perfectly smooth surface.

The prepared surface is treated with a deep-penetration primer such as Ceresit ST17, Knauf Grundirmittel, Starateli, or Optimist to strengthen the plaster layer to a depth of 5-8 mm and improve adhesive bond of the adhesive to the mineral substrate by 2-3 times. The primer is applied with a wide brush or short-pile roller (4-6 mm) in one or two coats with intermediate drying time of 2 hours, at a consumption rate of 150-200 g/m², and dries in 2-4 hours at 20-23°C and 50-60% relative humidity.

The installation line of the cornice is marked using a professional laser level or construction water level to ensure the high-profile cornice is strictly horizontal around the entire perimeter of the room without deviations, irregularities, or deviations from the horizontal plane. The laser level is mounted on a tripod in the center of the room and projects a horizontal red or green line onto all perimeter walls. From this projected line, a distance equal to the cornice height (90 mm) minus a compensatory gap (7-10 mm) is marked to prevent mechanical contact with the ceiling surface and to provide space for installing LED strip lighting for concealed lighting.

Control points are marked with a medium-hardness pencil every 500-600 mm along the perimeter of all walls and connected by a continuous line using a long aluminum rule 2000-2500 mm or a marking chalk line with blue or red pigment. The horizontal alignment of the line is checked with a bubble construction level at least 1800-2000 mm long on each wall with accuracy to 0.5 mm per meter to ensure the high cornice is perfectly horizontal.

Cutting of corner joints of high cornices is performed using a circular saw with a carbide-tipped disc of 250-305 mm diameter or a professional-quality hand mitre saw with 45-degree slots and a fine-toothed metal hacksaw blade with 32 teeth per inch for a clean cut without burrs. To form an internal angle, two cornice strips are cut at 45 degrees from opposite sides, ensuring tight fitting of the ends without gaps or seams along the entire 90 mm height of the profile. The cut edges are sanded with fine sandpaper P120-P150 to remove burrs, sharp edges, and unevenness that could prevent tight fitting of the high cornice elements.

The mounting adhesive of enhanced formula such as Moment Montage Superstrong Plus, Titan Styropor Professional, Macroflex Extra, or Sooud is applied to the back of the high cornice in the joint area with the wall as a continuous wavy strip 8-10 mm wide along the entire 90 mm height of the profile. Due to the increased profile height, more adhesive is required compared to standard cornices to ensure reliable fixation over the entire contact area.

After applying the adhesive, the cornice is left to air for 2-3 minutes to allow partial solvent evaporation and increase adhesive viscosity, significantly improving initial adhesion and facilitating secure mounting of the high-profile item on the vertical surface. Then, the strip is pressed against the wall along the marked line and firmly pressed with both hands along the entire length and height of the profile without excessive pressure that could deform the item.

The high cornice is fixed in position using 50 mm wide painter’s tape at several points, with the top edge of the tape secured to the ceiling, and additionally supported by temporary wooden wedges installed at an angle from the floor to the lower part of the cornice. The initial setting time of the adhesive is 6-8 hours, and full curing with maximum bond strength is achieved within 36-48 hours depending on room temperature and humidity.

Decorative possibilities and economic efficiency of the high cornice

The universal white color of the cornice A90V2 is an ideal base for implementing any design concepts, from strict neoclassicism to ultra-modern minimalism. The item harmoniously combines with white stretch and painted ceilings, creating a monochromatic solution with an expressive relief structure of maximum height. Leading manufacturers’ water-dispersible acrylic paints such as Tikkurila, Dulux, Kaparol, Tex, Becker are applied with a short-pile roller (4-6 mm) or a 40-50 mm wide brush in two to three coats with intermediate drying time of 4-6 hours to create a uniform, dense coating.

Painting the cornice in the ceiling color creates a visual height increase of 18-25 cm due to the continuity of the horizontal plane without a sharp color boundary separating the wall and ceiling, which is especially effective in rooms with high ceilings. Painting the cornice in wall color creates a monochromatic solution with a pronounced deep shadow contour, emphasizing the relief of the 90 mm high profile and creating a strong horizontal accent. Contrasting painting in dark, saturated graphite, anthracite, or charcoal tones against light walls creates a dramatic graphic solution for modern minimalist interiors in loft or industrial styles.

Organizing concealed LED lighting in the space between the high cornice and ceiling creates an effective decorative lighting effect, transforming a functional element into a central decorative accent in the interior. An LED strip with power 10-14 W/m is installed on the upper part of the cornice, directing the light beam toward the ceiling and creating an effect of a floating ceiling plane. The compact width of the cornice (27 mm) provides sufficient space for installing an LED strip 8-12 mm wide while maintaining the efficiency of the light output.

The cost of the polystyrene cornice A90V2 is 1450 rubles per 2-meter strip, making it an affordable solution for decorating premium-class interiors with high ceilings. The price is 5-7 times lower than wooden cornices made of oak or beech of similar size (90 mm height) and 2.5-3.5 times lower than polyurethane equivalents from European manufacturers. Savings when decorating a spacious apartment of 120 square meters with high ceilings amount to 25,000-40,000 rubles compared to wooden alternatives and 12,000-18,000 rubles compared to premium polyurethane cornices.

Cornice A90V2 POLYSTYRENE HI WOOD 90mm x 27mm x 2.0m is an expressive solution from a South Korean manufacturer for rooms with high ceilings from 2.8 to 3.2 meters, where a maximum vertical architectural accent of 90 mm height is required with a compact horizontal projection of only 27 mm, combining the monumentality of the profile with the practicality of modern materials, the possibility of organizing concealed lighting, and an affordable price for creating status-oriented elegant interiors of country houses, open-plan apartments, and premium-class commercial spaces.

Cornice A90V2 POLYSTYRENE HI WOOD 90mm x 27mm x 2.0m drawing