Gutex Thermoroom
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Product Overview
Main purpose
Breathable wall insulation for the internal side of solid masonry external walls.
Gutex Thermoroom is a component of the Retro EcoWall® solution.
Use it on
A level surface on the interior side of external solid masonry walls. Walls must be rendered on the outside and have no damp or moisture problems.
Overview
Gutex Thermoroom is a fully breathable natural wood fibre insulation board for internal walls made from recycled waste wood chips. It can be used as a high-performance interior insulation system on solid masonry external walls. Thermoroom provides excellent thermal insulation in winter and prevents overheating in summer. It also provides highly effective sound insulation to protect the building from external noise. The breathability of the system helps provide a healthy indoor environment by allowing moisture and humidity to pass through the wall in order to prevent condensation and mould problems occurring.
Features
- Excellent insulator
- Highly breathable
- Prevents summer overheating
- Excellent sound insulator
- Improves a building’s carbon footprint
- Certified by Natureplus
- Easy installation
- Fire resistant; chars rather than burns.
- Carbon negative production process, fully recyclable and safe.
Benefits
- Allows moisture vapour to move in both directions through a solid masonry wall which helps regulate humidity and moisture.
- An insulation with carbon negative production process which is made from waste woodchips originally from sustainable timber sources.
- Reduces impact of external noise and the transfer of noise between rooms.
- Certifications prove Thermoroom has healthy natural and environmental properties.
- Bonded to the wall with Gutex adhesive and tiled into place (no mechanical fixings are required) then finished with Lime Green Solo breathable plaster.
- Will char rather than burn. The final plastered surface ensures no rapid spread of flame when the wall is exposed to fire.
- With multiple thicknesses available, you can easily tailor the wall’s U value to what you need.
- Due to its high thermal mass, wood fibre absorbs heat and releases it very slowly so the building does not overheat.
Questions
Can Thermoroom be finished with gypsum type plaster?
Can the Thermoroom adhesive be dot and dabbed?
How do I fix a curtain pole or heavy item to the insulated wall?
Technical Details
Key Technical Data
Installation Guide
How to Install
As Gutex Thermoroom is a rigid board, the wall should first be levelled with a lime-based plaster such as Diathonite (for faster drying and additional insulation) or some other breathable lime-based plaster. After the levelling plaster is fully dry, Gutex’s breathable adhesive mortar should be applied to the back of the boards using an 8mm notched trowel. The adhesive should cover the entire surface of the board with no gaps. The boards can then be tiled into place. Tap the boards firmly onto the wall so every bit of adhesive is in contact with the board.
If you find the adhesive on the back of the board does not fully contact the wall after tapping into place, the wall may not be fully level and you will need additional adhesive. Remove the board and apply additional adhesive to the wall with a notched trowel.
Then re-apply the adhesive to the back of the board (with the same notched trowel) to make sure it is fully covered and combed to a uniform thickness. Re-apply the board immediately and tap into place to ensure there are no airgaps and the entire board is adhered to the wall.
Using a trowel with a wider notch so the thickness of adhesive is slightly greater (e.g. 10-12mm notch instead of 8mm) may be useful if you discover parts of the wall are not perfectly level or smooth.
Please note: if you do use a wider trowel or you apply adhesive to the wall and the board or the wall is not level, you will need more adhesive. The quantity calculator on this website provides quantities based on the assumption the wall is perfectly level and that an 8mm notched trowel is used to apply adhesive to the board only.
The Thermoroom system can be finished off with a breathable plaster like Lime Green Solo Plaster. Lime Green Solo has been tested and approved by Gutex for use as a breathable base coat and finishing plaster for Thermoroom boards. If used, apply a 5mm coat then cover with Thermoroom reinforcing mesh, then a second 5mm layer (see our installation guide and installation video for more details).
Use a trowel to gently embed the mesh into the surface of the plaster. Immediately apply a second 5mm coat of Solo on top. Use a wide plaster spatula to preliminarily smooth the surface; it doesn’t need to be perfect at this stage. Once the plaster begins to set and is firm enough so that touching it with your finger does not cause an indentation (approximately 2 hours), use a damp sponge to gently smooth out the surface and level out any trowel marks or uneven areas.
The sponge provides a level final finish with a semi-smooth texture. If you would prefer a smoother finish, use a flexible trowel 30 minutes after sponging to polish the surface. The Lime Green Solo should then be painted with a natural breathable paint like Auro.
Video Installation Guide:
Hints & Tips
The boards should be stored in a dry location and must only be installed when dry.