Parapet Wall Flat Roof Ventilation

Diagram below explains the build up.

Parapet wall flat roof ventilation.

Flat roof detail masonry cavity wall flat roof insulation above and between joists. Venting in wood framed parapets. What is the best way of addressing the ventilation and weather barrier here. Can use round louvered soffit vents to limit bulk water intrusion if venting holes are in exposed locations.

Treat these short parapet walls as part of the conditioned attic and cover. I have short 12 parapet walls surrounding a flat roof house in zone 2a. If cavity is greater than 12 above roof insulation provide high low venting in each wall cavity. This video is about making a transition form a flat roof to a parapet wall with taracotta clay caps.

The following images provide examples of flat roof details. Ventilated parapet detail cold roof installation of a typical ventilated parapet detail with the dryseal flat roofing system on a cold roof construction. Provide venting to each wall cavity. Flat roof detail examples.

The parapet walls are connected to the attic i guess this would be termed ballon framed which is conditioned. Where there is a parapet or an external wall abutment to the flat roof the fv250 ventilator can be used above a 150mm timber upstand battened off the wall by 25mm as shown below.