Grenalight high insulation board



Grenalight high insulation board is produced of expanded vermiculite and a special inorganic binder in a super low density of 350 kg/m3, which assure high resistance to thermal shock and high insulation properties.

Grenalight is completely free of asbestos, mineral fibers and glass fibers and they are sufficiently strong and mechanically stable.

The properties of Grenalight boards do not change, they do not deteriorate with aging not even when exposed to high temperatures. They never release fumes due to the high temperatures or during firing.

For more information about our company, of any material or to make any suggestions please contact our specialists or send us an E-mail, we will be more than please to assist you to the best of our abilities!

Grenalight is a non-structural board designed for the highest quality of insulation for fire-places, stoves, cookers and other heaters. It is not designed for construction of second fireplace mantles. The board Grenalight was developed at the request of customers - stove fitters, who sought an alternative to established products on the market. The board Grenalightis very light (vol. Wt. 350 kg/m3) and at the same time firm. It is made of 100% of natural materials, and therefore it is completely harmless to health. During cutting there is no dust, it has excellent insulating properties and, of course, it is completely non-ammable. Even when heated to hightemperatures there are no fumes.

Grenalight is recommended to used together with Grenaisol boards and Grenatherm boards. The board Grenalight can be used for non-bearing and non-structural parts of fireplace surrounds. It provides superior, healthier and technologically less demanding construction. You save your time. It can be processed with ordinary woodworking tools. Easy gluing with GrenaKlebepaste fire resistant up to 1200°C

Technical information:

  • Basic format: 1000 x 610 mm, 800 x 600 mm
  • Base material: vermiculite, iorganic binder
  • Machining method: woodworking tools
  • Thicknesess: 30, 40, 50 mm
  • Density: 350 kg/m3
  • Thickness tolerance: ±1 mm
  • Format tolrance: ±5 mm
  • Classification temperature Grenalight: 950 °C
  • Thermal conductivity at 200 °C: 0,12 W/mK
  • Grooves in the surface of the board up to 5 cm for easier measurement and cutting

Main advantages:

  • High insulating board
  • high-quality, quick and economical solution
  • easily workable using standard tools
  • ecological and natural material
  • long-term stability of the material
  • recommended by experts in the stove-construction field
Format (mm) Thickness (mm)


 800 x 600


1000 x 610



Aplications of Grenalight:


  • Wall insulation from heat sources

  • Insulation of a double ceiling of fireplace surrounds

  • Ceiling insulation under the soffit or ceiling of the room

  • Foundation insulation layer for baking areas and furnaces in general

  • Hearth insulation (behind the refractory board - e. g. Grenamat AS or chamotte)

  • Niche insulation inside fireplaces and stoves

  • Insulation of chimneys and chimney penetrations

  • Construction of ventilated insulation walls of storage buildings

  • Tile llers of thermally stressed places (e. g. tiles above the hearth or heater door)

  • Barriers and heat distribution in heaters or hypocausts

= new generation of construction and insulation materials

Use wood screws or staples to join the Grenalight boards and apply Grena Klebepaste glue on all surface in contact. All you need is standard tools such as a circular saw, a drill, wood rasp, etc.

Grenalight boards are very easy to work with.

Machining with normal wood working tools
řezání řezání vrtání sponkování šroubování frézování frézování tvarů drážkování
Manual shape cutting Cutting Drilling Coupling  Screwing Milling Milling shape Grooving


tel.: +420 381 549 111
fax: +420 381 581 071
The best quality
products only
sp cz en ru Latinoamérica Latinoamérica Netherlands Turkey Lithuania Poland Italy Austria Hungary Ukraine Germany Swiss
Kuchyňská dvířka E-shop