Warm Roof Eaves Ventilation

To provide ventilation opening points can usually be provided on the following areas of a pitched roof.

Warm roof eaves ventilation. Ventilation is also required at eaves level to a degree which equates to a 25mm continuous strip see figure 7. Klober flat roof vents. Warm roof rafter tray x 400mm harcon rt41. Ventilation openings either at the eaves or upstand.

Roof voids must be ventilated in order to stop warm air condensing on cold surfaces. 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. Eaves and ridge ventilation is not normally required.

Eaves ventilation is a simple and effective way of providing the necessary air movement within a cold roof. 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. Cold deck flat roof construction is more prone to defects and it has a shorter lifespan.

Ventilation must also be provided through the eaves or roof ridges using fascia vents or the skylight upstand on the roof. Eaves soffits and fascias. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Ventilation at the eaves. These are some of the reasons why a cold roof can be cheaper as ridged warm roof insulation tends to be more expensive a warm roof is sometimes the only option when it is difficult to get the required cross ventilation. Klober circular soffit vents provide eaves ventilation through the soffit and are a particularly easy option to install. Quantity discount inc vat 1 49.

Condensation encourages rot and mould growth. 25mm at eaves on each slope and 5mm at ridge. If ridge or eaves ventilation is not possible ventilation tiles can be used at high or low level to achieve the required airflow. For a simple duo pitch roof bs 5250 specifies sufficient ventilation as being.

Sometimes we get asked why choose a cold roof or warm roof. Warm deck the insulation is placed over the rafters and then a felt is placed on top. It is most effective when used in conjunction with high level roof ventilation provided by corovent slate tile and ridge vents. 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.