000			01750cad a22002175a 4500
001			L152938
008			110517s2011 xxkd f s f000 0 eng d
020			_a9781409828839
035			_a(Sirsi) u152938
041	0		_aeng
110	1		_aUnited Kingdom _bDepartment for Communities and Local Government _94939
245	0	0	_aEvaluation of unventilated pitched roofs with vapour permeable membrane _bfinal report _h[electronic resource]
260			_aLondon _bDCLG _c2011
520			_aThe overall objective of this project when first set out in June 2003, was to investigate current practice in the construction of unventilated roofs with vapour permeable membranes and also to make recommendations for compliance with the recommendations of an amended BS 5250 Code of Practice for control of condensation in buildings. The project objectives had to be revised as the amended BS 5250 anticipated to be published in 2004, was not in fact available until January 2006. The published amended BS 5250 does not consider the situation where it is proposed to provide no ventilation to the roof void, or ventilation more limited than the equivalent continuous low level loft space ventilation opening of 3 or 7 mm depending on how well the ceiling is sealed. Where no ventilation to the roof space is proposed, it is recommended that reference be made to the conditions attached to Technical Approvals given by UKAS (or European equivalent) accredited technical approval bodies.
521			_aAdvanced
590			_aKA
651		4	_aUnited Kingdom _y
690			_aBUILT ENVIRONMENT-BUILDING PATHOLOGY
856	4	0	_uhttps://www.communities.gov.uk/documents/corporate/pdf/1898582.pdf _zView this item free of charge at www.communities.gov.uk
942			_n0
999			_c112280 _d112280