Warm Roof Eaves Ventilation

Cold deck flat roof construction is more prone to defects and it has a shorter lifespan.

Warm roof eaves ventilation.

Klober circular soffit vents provide eaves ventilation through the soffit and are a particularly easy option to install. 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. This is to be provided by an unobstructed 50mm air gap between the roof deck and insulation. Condensation encourages rot and mould growth.

The battening and tiling is then fixed down over. Quantity discount inc vat 1 49. Eaves and ridge ventilation is not normally required. 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.

A vapour membrane should be added to the underside of the insulation and tacked to the joists before applying the plasterboard. Slating and tiling for pitched roofs and vertical cladding code of practice recommends that roof ventilation be provided in accordance with bs 5250. For a simple duo pitch roof bs 5250 specifies sufficient ventilation as being. Ventilation openings either at the eaves or upstand.

Sometimes we get asked why choose a cold roof or warm roof. Ventilation is also required at eaves level to a degree which equates to a 25mm continuous strip see figure 7. Home roof ventilation eaves ventilation warm roof rafter tray x 400mm harcon rt41. To provide ventilation opening points can usually be provided on the following areas of a pitched roof.

Roof voids must be ventilated in order to stop warm air condensing on cold surfaces. Ventilation at the eaves. If ridge or eaves ventilation is not possible ventilation tiles can be used at high or low level to achieve the required airflow. They also come in four colour options.

Warm deck the insulation is placed over the rafters and then a felt is placed on top. Hot air exhaust vents located at the peak of the roof allow hot air to escape. 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.

Warm roof ventilation specification. Klober flat roof vents. Ventilation must also be provided through the eaves or roof ridges using fascia vents or the skylight upstand on the roof. It is most effective when used in conjunction with high level roof ventilation provided by corovent slate tile and ridge vents.

Warm roof rafter tray x 400mm harcon rt41.