Grenamat B

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Grenamat B is a board made from expanded vermiculite, wooden substance and organic binders. The fire combustibility class of the board is B, and the boards are used to protect some types of the building structures against fire, for walls, filling or casing of fire doors, acoustic panels, for furniture, floor and acoustic panels, paneling of corridors, foyers and assembly areas, receptions of following buildings: nurseries, schools, hospitals, banks, office buildings, residential complexes, auditoriums, theatres, cinemas, gymnasium etc.
The boards can be worked by using normal wood-working tools and. Easy surface finish.

Reaction to fire according to EN 13 501-1, class B - s1,d0, classification for floors B_fl - s1.

More information you can get from our sales representatives for fire-resistant and non combustible Grenamat boards.

Technical information
format (mm): 1220 x 2440, other formats available upon request density (kg.m-3): 650 - 800 thickness (mm): 12 - 40
Examples of possible use

panelled walls	protection of lofts	fire-resistant safety door

Surface finish
HPL - High pressure laminate
High pressure laminate, delivered on boards of standard sizes, surface finish in recommended thickness up to 0,8 mm and calorific value 15 MJ. This condition enables the application of Grenamat boards even in protected escape routes. HPL is a wide variety of decors: wood decor, uni-colours, special designs such as photographs etc. Boards must be provided with finish on both sides (countermove). Very durable and hard surface, easy maintenance. Application in exposed areas. HPL can also be used for floating floors and kitchen plates.
CPL - Continuously pressed laminate
Laminate manufactured in rolls; its advantage is lower price and the possibility to apply finish on boards of various lengths and widths; surface finish up to 0,2 mm and calorific value 4 MJ; wide variety of decors: wood decor, uni-colours, special designs such as photographs etc. Boards must be provided with finish on both sides (countermove). Very durable and hard surface, easy maintenance. Application in exposed areas. Class of reaction to fire A2-s1,d0, if combined with Grenamat AL.
Natural veneer
Suitable for application in areas with emphasis on quality and natural materials; boards are provided with finish on both sides; to avoid countermove, paper or C quality veneer can be used. Very demanding but exclusive surface; must be sanded and varnished after formatting. Nevertheless class reaction to fire A2-s1,d0, if combined with Grenamat AL.
Natural veneer with transparent melamine
Suitable for application in areas with emphasis on quality and natural materials; boards are provided with finish on both sides; to avoid countermove, HPL can be used. After finishing no additional treatment necessary; ready-for-use surface. Durable and hard surface, easy maintenance. Application in vulnerable spaces.
Paper
Provides smooth finish; also replaces base paint layer (primer-coat). This finish together with a non-flammable Grenamat AL board is classified as class to fire A2-s1,d0. To maintain this class of flammability, only water-souluble paints must be applied.
Paint
On Grenamat boards, decorative paints can be applied; considering fire regulations we recommend water-soluble acrylic paints. As for Grenamat AL boards, paints can be applied directly, even without penetration. In case of Grenamat B we recommend to use background paper under the paint in order to improve the surface quality. Thereafter calcium-acrylic paints can be applied.
Plaster
Thin plaster can be applied directly in the Grenamat boards using a palette-knife or roller depending on type of plaster. In order to improve the quality of joints apply gauze under the plaster, drag it with a supporting basic plater or adhesive and then apply thin plaster. In the end, you can also apply paint. This colour is suitable if the design of plaster walls or ceilings is required.

Working with Grenamat boards
Formatting, drilling, milling and jointing
Grenamat boards can be easily machined using conventional woodworking tools. We recommend tools made of hard metals or with sheets of cemented carbides. Use ventilation equipment during the work. Dust arising during cutting does not contain any harmful substances and is incombustible.
Edges and end profiles
Grenamat boards can be provided with edges (HPL, ABS, solid wood), postformed etc. The method of execution is similar to standard chipboards.
Special Treatment - Bending
There are only a few ways to bend a Grenamat board. After the finish is bent on one side (HPL, CPL, veneer, paper), the board can be moistened, bent using a template and reformed to the required shape. This is however difficult, therefore, we recommend to groove (saw) the board - after 1 layer is applied. Use a 4 mm saw with about 10 mm pitch, and then bend it to the desired radius using a template. Thereafter glue the backing layer or a board milled the same way, clamp the secretions together, strip them together and let the glue dry.
Packaging and storage
Grenamat boards are packed in stretch foil on a palette, covered with protective chipboard. Corners are protected by hard cardboard , joined together with tape so that they cannot move, and marked. This way the boards are sufficiently protected from damage and humidity. For further transportation, boards can be packed in hard wooden boxes resistant to rough handling. Boards must be stored in a dry indoor space with maximum air humidity 80%.
Handling
Grenamat boards packed on a pallet should be handled in horizontal position. They must be secured against displacement using underlay to prevent bending. In order to avoid the risk of breakage, we recommend transferring boards in upright position.
Maintenance and treatment
Grenamat boards can be treated using ordinary cleaners and can be lightly moistened. Never use water for cleaning as the boards are slightly absorbent. Boards with surface finish can be treated as recommended by the finish (CPL, HPL, veneer, paper) supplier.