Warm Roof Eaves Ventilation

Klober circular soffit vents provide eaves ventilation through the soffit and are a particularly easy option to install.

Warm roof eaves ventilation.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. Klober flat roof vents. They also come in four colour options. A vapour membrane should be added to the underside of the insulation and tacked to the joists before applying the plasterboard.

Rt41 0 82 inc vat 0 98 corovent 400mm single rafter tray provides 25mm air gap per lm for warm roofs or pitches below 15 degrees rt41. If ridge or eaves ventilation is not possible ventilation tiles can be used at high or low level to achieve the required airflow. Ventilation at the eaves. For a simple duo pitch roof bs 5250 specifies sufficient ventilation as being.

It is most effective when used in conjunction with high level roof ventilation provided by corovent slate tile and ridge vents. Roof voids must be ventilated in order to stop warm air condensing on cold surfaces. Eaves and ridge ventilation is not normally required. 25mm at eaves on each slope and 5mm at ridge.

Ventilation is also required at eaves level to a degree which equates to a 25mm continuous strip see figure 7. Ventilation must also be provided through the eaves or roof ridges using fascia vents or the skylight upstand on the roof. Sometimes we get asked why choose a cold roof or warm roof. Eaves ventilation is a simple and effective way of providing the necessary air movement within a cold roof.

Quantity discount inc vat 1 49. The battening and tiling is then fixed down over. Ventilation openings either at the eaves or upstand. Warm roof rafter tray x 400mm harcon rt41.

The air gap dimensions shown on the drawings are the minimum widths required for clear continuous ventilation air paths at the eaves. Warm roof ventilation specification. Eaves soffits and fascias. This is to be provided by an unobstructed 50mm air gap between the roof deck and insulation.

Condensation encourages rot and mould growth. Warm deck the insulation is placed over the rafters and then a felt is placed on top. Cold deck flat roof construction is more prone to defects and it has a shorter lifespan. Slating and tiling for pitched roofs and vertical cladding code of practice recommends that roof ventilation be provided in accordance with bs 5250.

Home roof ventilation eaves ventilation warm roof rafter tray x 400mm harcon rt41.