Warm Roof Ventilation

A warm deck roof is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation.

Warm roof ventilation.

Ventilated roofs remove moisture from roof cavities structural members sheathing and insulation. These roofs keep your home cooler during the hot summer months. To provide ventilation opening points can usually be provided on the following areas of a pitched roof. The enclosed void of a warm pitched roof does not require to be ventilated.

When thermal insulation is placed below the deck the ventilation must also be on the underside. Roof ventilation is not a new process by any means. Flat roof ventilation allows for the circulation of air in the property particularly for warmer rooms in residential buildings. Cold bridging through the system is easier to eliminate or control as ordinarily there are no breaches from the structural supports as there is in a cold roof construction.

If ridge or eaves ventilation is not possible ventilation tiles can be used at high or low level to achieve the. Warm roof ventilation specification 25mm at eaves on each slope and 5mm at ridge. A properly insulated ventilated roof can help to control or prevent the formation of ice dams. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. Because the sheathing is kept cooler roofing materials tend to have a longer life span. The early to mid 20th century saw the development of this concept. Ventilation is important for all parts of your house and the roof is no exception.

Roof surface ridge line eaves soffits and fascias. There are two types of flat roof systems warm and cold roofs which affect the positioning of the ventilation. With the introduction of vapour permeable plastics underlays the need to create ventilated voids above inclined insulation and the requirement to ventilate cold roof lofts may be reduced.