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BS EN 13897:2004
Flexible sheets for waterproofing. Bitumen, plastic and rubber sheets for roof waterproofing. Determination of watertightness after stretching at low temperatures (British Standard)
This document specifies a test for determining the ability of flexible sheets to remain watertight after being stretched at low temperature. This standard is applicable only for mechanically fastened single layer waterproofing. This standard has been drafted for application in roofing, but it may also be used in other areas where it is relevant.
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British Standards Institution [bsi]
British Standards Institution [bsi]