Warm Roof Eaves Ventilation

Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.

Warm roof eaves ventilation.

Warm roof ventilation specification. A vapour membrane should be added to the underside of the insulation and tacked to the joists before applying the plasterboard. Hot air exhaust vents located at the peak of the roof allow hot air to escape. Ventilation must also be provided through the eaves or roof ridges using fascia vents or the skylight upstand on the roof.

For a simple duo pitch roof bs 5250 specifies sufficient ventilation as being. Ventilation is also required at eaves level to a degree which equates to a 25mm continuous strip see figure 7. 25mm at eaves on each slope and 5mm at ridge. 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.

It is most effective when used in conjunction with high level roof ventilation provided by corovent slate tile and ridge vents. If ridge or eaves ventilation is not possible ventilation tiles can be used at high or low level to achieve the required airflow. Klober circular soffit vents provide eaves ventilation through the soffit and are a particularly easy option to install. The air gap dimensions shown on the drawings are the minimum widths required for clear continuous ventilation air paths at the eaves.

Home roof ventilation eaves ventilation warm roof rafter tray x 400mm harcon rt41. Slating and tiling for pitched roofs and vertical cladding code of practice recommends that roof ventilation be provided in accordance with bs 5250. Roof voids must be ventilated in order to stop warm air condensing on cold surfaces. 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.

Quantity discount inc vat 1 49. The battening and tiling is then fixed down over. This is to be provided by an unobstructed 50mm air gap between the roof deck and insulation. Condensation encourages rot and mould growth.

Klober flat roof vents. Ventilation at the eaves. They also come in four colour options. Ventilation openings either at the eaves or upstand.

Warm roof rafter tray x 400mm harcon rt41. Cold deck flat roof construction is more prone to defects and it has a shorter lifespan. Eaves ventilation is a simple and effective way of providing the necessary air movement within a cold roof. Eaves soffits and fascias.

Sometimes we get asked why choose a cold roof or warm roof.