Roofshield is a unique three layer nonwoven spunbonded polypropylene breather membrane. It is intended for use as a pitched roof underlay and is fixed beneath tiles and slates.
Roofshield provides a secondary barrier to the ingress of rain, wind and snow. It has a low vapour resistance & is air permeable and reduces the risk of interstitial condensation in pitched roofs.
The combination of low vapour resistance and air permeability eliminate the need for low and high level ventilation. It also negates the need for a vapour control layer or air barrier fixed at ceiling level. This is a basic requirement with other products which are air impermeable and have a significantly higher vapour resistance.
The product provides the most cost effective solution to controlling interstitial condensation in a pitched roof. The exclusion of ventilation and a vapour control layer eliminates the cost of buying the components and labour to install them.
The A Proctor Group has been supplying Roofshield for ten years with millions of square metres installed in the UK and Ireland during that time. The product is IAB and BBA approved for use without ventilation or a vapour control layer in both warm and cold pitched roof construction. It can also be used with square edged soft wood timber sarking planks.