Pitched Roof Eaves Ventilation

A key benefit of venting the attic is that the approach is the same regardless of how creative your architect got with the roof.

Pitched roof eaves ventilation.

Slating and tiling for pitched roofs and vertical cladding code of practice recommends that roof ventilation be provided in accordance with bs 5250. Because the roof isn t in play here it doesn t matter how many hips valleys dormers or gables there are. In mixed climates ventilation serves either role depending on the season. Set top of fascia board at correct level and fit ventilator in accordance with manufacturers recommendations.

If it is through the roof covering it should be placed as high as practicable. Eaves ventilation is a simple and effective way of providing the necessary air movement within a cold roof. To provide ventilation opening points can usually be provided on the following areas of a pitched roof. This should ensure that effective through ventilation of the whole roof is achieved and assist in pulling moisture laden air out of the building and limiting condensation.

If a sprocketted or bell cast detail is used then eaves courses should beno lower than the minimum recommended roof pitch. Where the roof pitch is 15 or more ventilation equivalent to a 10mm slot running the full length of the eaves should be provided. We stock a wide range of pitched roof vents and roof ventilation products from leading brands such as ubbink marley eternit redland. It is most effective when used in conjunction with high level roof ventilation provided by corovent slate tile and ridge vents.

Where the ceiling follows the slope of a roof regardless of pitch or where a cold roof has a pitch less than 15 ventilation equivalent to a 25mm slot running the full length of the eaves should be provided a nominal clearance of 50mm should be maintained. Sufficient cold roof ventilation. Eaves soffits and fascias. A pitched roof which has a single slope and abuts a wall should have ventilation openings at eaves level and at high level.

The air gap dimensions shown on the drawings are the minimum widths required for clear continuous ventilation air paths at the eaves. Eaves courses of tiles should be at same pitch as general tiling. To comply with approved document c and bs 5250 crossflow ventilation should be provided at both the eaves and or ridge level. Timloc 3 in 1 eaves ventilation pack 10mm airflow 300mm rafter tray 13 86 ex vat 16 63 inc vat.

The ventilation at high level may be arranged at the junction of the roof and the wall or through the roof covering. Manthorpe g1275 eaves comb filler.