Why Permavent was chosen

Permavent Ltd are specifiers of a unique roofing underlay which is advantageous for thatched roof applications and has revolutionised traditional thatched roofing practices. Skytech PRO XL is a non-combustible A2-s1, d0 membrane, providing improved watertightness (W1) and vapour-permeability in accordance with BS5534 & 5250. Skytech is also an insulant, providing additional thermal and acoustic benefits. For these reasons Permavent Ltd are providing a modern, aesthetically invisible improvement to traditional roofing.

Permavent SKYTECH PRO XL was recommended by the Thatcher for the following essential benefits:

• A flexible, more water-resistant and cost-effective alternative to rigid fire-boards.
• A combination of integral and external SKYTECH tapes guarantee excellent fire protection (A2-s1, d0).
• Robust Watertightness (W1), acting as an important temporary roof covering during the thatching process.
• Additional thermal & acoustic benefits realised, using high performance insulation within SKYTECH’s technology.
• A fully breathable solution, compliant with BS5250 Control of Condensation.

A rethinking of the ‘Dorset Model’, Thatchers like Keith Walden can install Skytech PRO XL with ease and confidence, a primary reason for Permavent Ltd’s involvement in Batchcott House. The property is a family home and holiday cottage in rural Shropshire, with roofing elevations dating back to the 16^th century.

How Permavent Products were installed:

The existing thatched roof was stripped, exposing areas of original thatch from the 16^th century, 1500mm deep. Where necessary rafters have been replaced with new treated timber.

SKYTECH PRO XL has been installed as per Permavent’s fitting instructions, good roofing practice and compliance with BS5534 & 5250. Restrained using treated batten and counter-batten, prior to installation of new Water-Reed thatch.

Accompanying Materials

• New Timber Frame Rafters
• SKYTECH PRO XL & SKYTECH TAPE
• Treated Timber Batten & Counter-Batten
• New Water-Reed Thatched Roof

Developer/Installer:

Merchant: Boden Roofing Supplies

Installer: Keith & Tom Walden: Walden and Sons Master Thatchers