Domestic Roofing Guide - Surface Coatings

There are a number of surface treatments on the market designed to form a protective layer over slates or tiles. The coating compound is applied in a liquid state, which hardens off, sealing gaps and holding the slates or tiles in place.

This type of treatment does not remedy faults in tiling battens and rafters, which may continue to decay due to moist air becoming trapped in the roof space. Natural ventilation through the roof coverings is prevented and alternative methods would be required.

The life of the material is uncertain, and the British Standard B.S.5534 Slating & Tiling does not recommend the use of surface coatings either internally or externally.

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