Overview
Thermasheet can be fixed to timber or steel stud walls in internal or external applications. The boards are lightweight, easy to handle and install, and provide a strong, waterproof and stable substrate for tiles, microcement, render and other finishes.
Key points
- Bead of MSP Sealant on studs before fixing boards
- Corrosion-resistant screws with large washers
- All board edges supported by studs or noggings
- Seal every joint with MSP Sealant and reinforcing tape
You'll need
- Thermasheet boards + MSP Sealant
- Reinforcing tape, screws & washers
- Utility knife or circular/track saw
- Driver, caulking gun, level, PPE
Installation steps
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1
PREPARE FRAME
Ensure the stud frame is plumb, true and clean, with noggings installed where required. Check services are installed and clear of the board.
Timber stud wall prior to fixing Thermasheet -
2
APPLY SEALANT TO FRAME
Apply a continuous bead of Thermasheet MSP Sealant to the studs at each fixing line before placing the board. This helps with adhesion and support, and minimises movement.
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3
FIX BOARD
Position the board against the frame. Fix using corrosion-resistant screws with large washers at the appropriate centres (see the stud spacing guide below). Ensure board-to-board edges are supported by studs or noggings.
Thermasheet board fixed over frame -
4
JOIN BOARDS
Fill all board joints with Thermasheet MSP Sealant and embed Thermasheet reinforcing tape. Ensure a continuous waterproof seal at all joints, corners and penetrations.
Sealed joints in a Thermasheet-lined shower -
5
FINISH
Once the sealant has cured, the surface is ready for tiles, render, microcement or other decorative finishes. Use suitable flexible adhesives and follow the manufacturer's guidelines.
Stud spacing guide: walls
| Board thickness | Stud centres | Notes |
|---|---|---|
| 6 mm | N/A | Not recommended for direct fixing to stud walls |
| 10 mm | 400–450 mm | General wall applications |
| 12 mm | 400–450 mm | General wall applications |
| 20–100 mm | 600 mm | General wall applications |
