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Home > Building elements and structures > Roofs and roofing 

Title: Ventilating thatched roofs

Ref Code: GG32

Abstract1: Thatch is permeable to air and moisture; when constructed traditionally it is a weather resistant, breathable and highly durable roofing material. However, the introduction of impermeable plastics, the requirements of building regulations for additional insulation and reduced air leakage, can increase the risk of condensation within the thatch, so affecting its durability. This Guide explains how to reduce that risk by introducing cavities and ventilation below the thatch. It applies to new roofs and where the thatch of an existing roof is to be replaced. Local authorities may require a consent application for the removal of thatch or if the insertion of new materials would change the behaviour of the roof.



Year Published: 1999

ISBN: 978-1-86081-297-2


Pages: 4


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