Insulating Membrane Roof

Lightweight insulated concrete also known as lwic is a material intended for use as an insulation and substrate for support and attachment of roofing membranes on slope roofs.

Insulating membrane roof.

A vapour membrane is also a likely requirement to stop moisture which is naturally generated in an occupied room. Without a membrane vapour would rise and penetrate into the roof and insulation. Roof edge detail overhang extended to hide the thickness of the over roofing rigid insulation. Roof membrane ybs insulation manufacture specially designed roofing membranes which allow the roof to breath and help protect against the ingress of wind rain and snow.

I have an insulation factor of about 8 10 plus the reflectivity of the white tpo. Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation. Should i leave out the soffit vent. Also there is a soffit vent but none at roof peak.

It is an acceptable practice to install a new roof over an existing roof membrane system provided that the roof deck is. The lwic systems are composed of either aggregate or cellular concrete. How to install insulation board over an existing roof membrane. The old roof was tar and gravel so the switch to tpo should show significant change.