Slate Roof Ventilation Requirements

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Pin On Dormers

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Eaves soffits and fascias.

Slate roof ventilation requirements.

Slating and tiling for pitched roofs and vertical cladding code of practice recommends that roof ventilation be provided in accordance with bs 5250. Condensation encourages rot and mould growth. How many slate roof vents do i need. As you noted slate roofs tend to allow air movement through the slates.

The air gap dimensions shown on the drawings are the minimum widths required for clear continuous ventilation air paths at the eaves. To provide ventilation opening points can usually be provided on the following areas of a pitched roof. The ventilation requirements may vary based on the circumstances of the building. Matthias in my judgment you can skip the ridge vent.

They are super easy to fit either for new roofs or renovating an existing one. Additional ventilation at or near the ridge equivalent to a 5 mm continuous vent is required in the case of warm roofs and is also recommended if the case of cold roofs if pitch of the roof is greater than 35 or if the span is greater than 10 metres. To comply with the code of practice for control of condensation in buildings bs 5250 2011 a1 2016 and the nhbc roof vents should be installed at both the eaves and ridge level. 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.

Moreover slates are vapor permeable so moisture problems at the sheathing layer are highly unlikely.

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