T65 Impact Foam

Impact foam for multi-level buildings with concrete floors

Effective impact noise reduction Economical solution at design stage Ideal for wet areas

Thermotec T65 Impact Foam is a closed cell polyethylene foam sheet, particularly suitable for impact noise reduction and protecting waterproof membranes from damage and backfill operations due to its high impact and abrasion resistant properties. Normally specified for use in wet areas where fall to waste pipes are needed and a 40mm to 75mm thick (thicker screed may be used) screed will be applied as a base for tiling.

When used on horizontal surfaces, the sheets may be loose laid with edges and ends butted tightly together. Do not overlap material. Polyethylene is very inert and will not react chemically with waterproofing membranes.

Edges and end joins should be tapped over using adequate tape to seal the join against ingress by the cement when poured over the foam. Gaining adhesion is typically difficult, however 50mm – 75mm wide tape will adhere adequately enough until the topping screed is poured.

It is very important to isolate the edges of the topping slab from the wall face to prevent mechanical noise transmission into the wall system, thus compromising the floating slab noise isolation concept.

Foam should be cut into strips and should be applied against the wall to the full depth of the topping screed. The architrave or resilient sealant can be applied over the top of the strip to conceal the top edge if desired.