Roof Ventilation Requirements Scotland

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Roof ventilation requirements scotland.

The requirements will be met by the ventilation of those roofs where the moisture from the building can pass through the insulation. The overall provision of trickle ventilation in a dwelling may be provided at an average of 11 000 mm2 per room with a minimum of 11 000 mm2 for each apartment. A new standard bs 8612 was released in february 2018 and sets out minimum performance requirements for dry fixed roofing systems in regards to fixing wind load resistance durability and ventilation according to bs 5250. We regularly consult with industry to review our guidance.

Section r806 roof ventilation r806 1 ventilation required enclosed attics and enclosed rafter spaces formed where ceilings are applied directly to the underside of roof rafters shall have cross ventilation for each separate space by ventilating openings protected against the entrance of rain or snow. Extract rates should be reduced. Building regulations contain the technical requirements to protect the public interest. A roof void above an insulated ceiling.

Technical handbooks for use from 1 october 2019. This guidance page gives you a broad view of the requirements for using the roof space in dwellings and if more detailed information is required it is necessary to refer to the technical handbook and the building standards scotland regulations. Enter square footage calculate or enter the square footage of the attic or area to be vented. The air gap dimensions shown on the drawings are the minimum widths required for clear continuous ventilation air paths at the eaves.

Select 100 is a classically styled bathroom extractor fan range designed to comply with current building regulations. Roofs with a pitch of 15 or more. Condensation encourages rot and mould growth. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.

We publish technical handbooks which explain how to achieve the requirements set out in the building scotland regulations 2004. The wider the span the more free airflow is required in the roof space. Duo pitch roofs greater than 200 pitch or greater than 10m span should have additional ventilation at the ridge to assist airflow through the roof void equivalent to at least a 3 mm wide continuous gap. Roof voids must be ventilated in order to stop warm air condensing on cold surfaces.

It applies to both new build and refurbished roofs.