Pitched Roof Eaves Ventilation

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Pitched roof eaves ventilation.

A pitched roof which has a single slope and abuts a wall should have ventilation openings at eaves level and at high level. It is most effective when used in conjunction with high level roof ventilation provided by corovent slate tile and ridge vents. In mixed climates ventilation serves either role depending on the season. Eaves soffits and fascias.

The air gap dimensions shown on the drawings are the minimum widths required for clear continuous ventilation air paths at the eaves. Timloc 3 in 1 eaves ventilation pack 10mm airflow 300mm rafter tray 13 86 ex vat 16 63 inc vat. If it is through the roof covering it should be placed as high as practicable. Duo pitch roofs greater than 20 0 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.

A key benefit of venting the attic is that the approach is the same regardless of how creative your architect got with the roof. Sufficient cold roof ventilation. Because the roof isn t in play here it doesn t matter how many hips valleys dormers or gables there are. Eaves ventilation is a simple and effective way of providing the necessary air movement within a cold roof.

Slating and tiling for pitched roofs and vertical cladding code of practice recommends that roof ventilation be provided in accordance with bs 5250. Eaves with over fascia ventilation. The ventilation at high level may be arranged at the junction of the roof and the wall or through the roof covering. To comply with approved document c and bs 5250 crossflow ventilation should be provided at both the eaves and or ridge level.

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. If a sprocketted or bell cast detail is used then eaves courses should beno lower than the minimum recommended roof pitch. Set top of fascia board at correct level and fit ventilator in accordance with manufacturers recommendations. Eaves courses of tiles should be at same pitch as general tiling.

Manthorpe g1275 eaves comb filler. To provide ventilation opening points can usually be provided on the following areas of a pitched roof.