Transcription of Ventilation - Product Guide Vol 19/a
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Ventilation - Product Guide Vol 19/a
VentilationPRODUCT Guide volume 19/aventilationproductsfor roofs, walls and floorsCl/SfB( )(47) alternative listingVentilationPitched roof - above 15 Pitched roof - below 15 Mono pitch roof - above 15 Mono pitch roof - below 15 10mm gap10mm gap25mmgap10mmgap25mmgap5mm gap5mm gap25mmgapFlat roof - cold deck25mmgap25mmgapFlat roof - abutmentCeiling following pitch of roof25mmgap25mmgap25mmgap25mmgapUnder floor and void ventilationCavity and compartmented /fire stopped sectionsReferences: Approved Document 5250. BRE Report Document C 2004 5534. NHBC Standards. Zurich Standards. Scottish cold roofs should crossventilate. The equivalent of a 10mmgap running continuously the fulllength of both eaves is usual. Onpitches above 35 where the spansexceed 10m consider also higher-level (equivalent 5mm) additionalventilation as defined in slope (monopitch) roofs maybe ventilated (equivalent 10mm) ateaves and (equivalent 5mm) atroof/wall intersection or ensure every Ventilation routeis cross balanced - with entry andexit the insulation follows the roofslope observe the increased aperturerequirement at eaves and the needto
ventilation PRODUCT GUIDE volume 19/a ventilation products for roofs, walls and floors Cl/SfB (21.9) (47) alternative listing Ventilation
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