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Waterproof protection for joists that prevents rotting of structural timber under exterior floors, such as patios and balconies. The joist guard is a 0.6 mm self-adhesive waterproofing membrane made of elastomeric SBS bitumen and a polyethylene film on the surface. The under face is composed of a silicone film easily detachable.
- Substantially extends the service life of patios at low cost
- Barely visible between the boards
- Self-sealing around screws and nails