Cavity fill insulation – Cemwood CW1000

Product overview

Where is it used?

• Cemwood CW1000 can be used as an insulation fill under wet or dry screed materials, under floating timber floors or under the Lithotherm underfloor heating system.
• It can also be used within timber floor structures to reduce sound transmission and increase thermal insulation.
• Suitable for new build or refurbishment projects.

How is it used?

• Voids should be dry and free of debris and moisture for maximum effectiveness.
• If used in a masonry cavity wall ensure a barrier is installed at DPC level to prevent Cemwood filling up below DPC. Also ensure air bricks are not blocked.
• The Cemwood CW 1000 can simply be poured in from the top of the cavity and allowed to fill the cavity below. Tricky areas can be vibrated with a blunt SDS hammer chisel on a solid piece of timber pressed against the wall to ensure complete filling.
• For floor levelling, the Cemwood CW 1000 comes in sacks and can be simply poured in to place and levelled off with thicknesses varying from 10 – 60mm maximum.
• The easiest way to instal is to set up rails, using timber battens or metal pipes and level off with a long straight edge.
• Once levelled, carefully remove rails and fill in voids.
• Before laying a timber floor over, add a layer of 22mm UdiTOP wood fibre boards to spread the load and prevent any granules getting in to the T&G joints in the flooring.

How much will you need?

Cemwood CW 1000 has a density of 0.32kg per mm per m² (1mm thickness over 1m²). Each 16kg bag (50 litres)  will cover up to 1m² at 50mm thickness or 5m² at 10mm thickness.