Venting Flat Roof With Parapet Walls

The perimeter of the roof assembly insulation is wrapped to prevent interstitial airflow from the parapet into the multilayered rigid insulation of the field of the roof.

Venting flat roof with parapet walls.

Normally you would find the venting at the soffit the underside. What is the best way of addressing the ventilation and weather barrier here. Venting in wood framed parapets. Treat these short parapet walls as part of the conditioned attic and cover.

The cure for parapetitus is continuity of the control layers and letting things move when they have to move. The parapet walls are connected to the attic i guess this would be termed ballon framed which is conditioned. The parapet itself is standard wood framing with an applied siding in this case t g 1 4 cedar. I have short 12 parapet walls surrounding a flat roof house in zone 2a.

Provide venting to each wall cavity. For areas which do not need above cover. Max baker and stonewall jackson would be proud. The parapet walls are connected to the attic i guess this would be termed ballon framed which is conditioned.

The assembly is straight forward but what complicates matters is that the roof needs to be vented. 2 create a path by wich natural convection would be made by the connection of the shed roof with the flat roof via the vertical wall 3 close the fascia vents off the flat roof only has fiberglass batts with an r22 value so one day in the future the roof will need to be replaced and rigid foam can be placed on top but that will have to wait. If cavity is greater than 12 provide high low venting in each wall cavity. Treat these short parapet walls as part of the conditioned attic and cover.

What is the best way of addressing the ventilation and weather barrier here. I ve had several followers of this channel ask me how to create a flat style roof with parapet walls so i thought it was about time to show how to sketch th.