Lead Flat Roof Ventilation

Oatey retro master roof flashing 1 4 in to 4 in x 8 in epdm rubber vent and pipe flashing.

Lead flat roof ventilation.

Code 5 lead on geotextile membrane on 12mm wbp plywood above 50m ventilation gap formed with 50x50 battens above insulation sat on vcl sat on 19mm wbp plywood sat on. A cold roof or hot roof. Any type of roof from tpo to epdm can be either hot or cold. To provide ventilation opening points can usually be provided on the following areas of a pitched roof.

The two roof ventilation options intake vents and exhaust vents should be placed to take advantage of the natural increased speed of air circulation. For pricing and availability. This occurs through the rising of warm air and the falling of cooler air. There are two types of flat roof systems warm and cold roofs which affect the positioning of the ventilation.

Reading up on lead detailing seems to require that a lead flat roof min. Slating and tiling for pitched roofs and vertical cladding code of practice recommends that roof ventilation be provided in accordance with bs 5250. The makeup for the roof i m proposing is as follows. Hot roofs have the roof deck then insulation then the roofing material.

Eaves soffits and fascias. How much ventilation does a flat roof need. Perma boot 2 in x 15 in plastic vent. When thermal insulation is placed below the deck the ventilation must also be on the underside.

1 80 requires ventilation of 50mm below the deck. It depends on where the insulation is installed. For guidance on the amount of ventilation required reference should be made to british standards 5250 and 6229. Airtrak is a proprietary range of ventilators designed specifically for the ventilation of roof voids.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Where a warm roof is used a ventilation void should be provided between the insulation and the timber decking supporting the lead if there is sufficient height available. Intake vents located at the lowest part of the roof under the eaves allow cool. Mayco industries inc 1 1 2 in x 10 in lead vent and pipe flashing.

Intake vents such as soffits are placed lower on the roof usually under the eaves. Airtrak assists specifiers builders and specialist contractors in helping them to meet the requirements of the building regulations in relation to the important issue of roof void ventilation and the control of condensation. Flat roof ventilation allows for the circulation of air in the property particularly for warmer rooms in residential buildings. Both are available with a range of spigot sizes you can choose from and are made using 100 code 4 and 5 sheet lead milled to british standard bs en 12588.