Parapet Wall Flat Roof Ventilation
Flat roof detail masonry cavity wall flat roof insulation above and between joists.
Parapet wall flat roof ventilation. Diagram below explains the build up. Parapet detail masonry cavity wall flat roof with parapet insulation. The following images provide examples of flat roof details. This video is about making a transition form a flat roof to a parapet wall with taracotta clay caps.
Ventilated parapet detail cold roof installation of a typical ventilated parapet detail with the dryseal flat roofing system on a cold roof construction. Venting in wood framed parapets. Treat these short parapet walls as part of the conditioned attic and cover. The 25mm batten space creates a clear airpath to the roof void below so reducing the possibility of condensation and mould growth.
The parapet walls are connected to the attic i guess this would be termed ballon framed which is conditioned. I have short 12 parapet walls surrounding a flat roof house in zone 2a. Flat roof detail masonry cavity wall flat roof insulation above and between joists. What is the best way of addressing the ventilation and weather barrier here.
If cavity is greater than 12 above roof insulation provide high low venting in each wall cavity. 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.