Undertile Felt is the traditional underslating, complying to British Standards and still favoured by many roofers.
Undertile Felt Reinforced slaters' felts are manufactured specifically for use as an underslating beneath tiles or slates in open rafter construction.

It can also be used as a vapour retarder in built-up roofing.

Undertile Felt has a felt fibre base combined with a layer of open weave hessian, saturated and coated with bitumen and surfaced with sand.

Long established and highly regarded slaters' felt

Suitable for cold ventilated roofs

UK manufactured

(Formerly BS747 Type 1F)