Venting A Flat Roof With Parapets

The pathways are linked between two walls on either side of the flat roof.

Venting a flat roof with parapets. Normally you would find the venting at the soffit the underside of the roof overhang but that s not possible with the parapet. Consequently the article concludes that the concept of venting a flat roof is no longer safe and instead don 039 t vent the flat roof and install a smart vapor retarder inboard. If the one hour parapet exceeds the 30 inch minimum can the roof be vented to the inside as long as the vents are 30 inches above the roof deck. The article notes that the ventilation cannot overcome the significant humidity drive into the flat roof structure caused by small air leaks.

Venting a flat roof usually contractors install parapet walls with the venting linked between the two. Venting in wood framed parapets. Instead the air is vented through the roof to the parapet walls the parapet then incorporates a continuous strip vent beneath the cap flashing. Flat roof ventilation allows for the circulation of air in the property particularly for warmer rooms in residential buildings.

There are two types of flat roof systems warm and cold roofs which affect the positioning of the ventilation. When thermal insulation is placed below the deck the ventilation must also be on the underside. Trying to vent a flat and the question came up. Provide venting to each wall cavity.

Can use round louvered soffit vents to limit bulk water intrusion if venting holes are in exposed locations.