EW808B Thatch Fireboard System


This is an assessment of the TAS100 Thatch Fireboard System for use in thatched roofs.

Thatch Fireboard System comprises TAS100 Thatch Fireboard (9mm thick non-combustible calcium silicate fireboard) installed over rafters prior to installation of traditional thatch roof covering.

Thatchbatt® resin bonded insulation slabs are installed between rafters supported on Thatchbatt® Wired fixing system with vapour control layer and finishing layer.

The system is suitable for use as roof covering within 6m of a relevant boundary.


Valid until 5th April 2021


Please Note: Every care was taken to ensure the information was correct at the time of publication. Any written guidance provided does not replace the user’s professional judgement. It is the responsibility of the dutyholder or person carrying out the work to ensure compliance with relevant Building Regulations or applicable technical standards.


Thatching Advisory Services (UK) Ltd
8-10 Queen Street
EX12 2NY
01297 23671