Insulating Membrane Roof

The lwic systems are composed of either aggregate or cellular concrete.

Insulating membrane roof.

Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. Should i leave out the soffit vent. A vapour membrane is also a likely requirement to stop moisture which is naturally generated in an occupied room. Is there any advantage to trying to get any insulation in between the 2 8 rafters.

Also there is a soffit vent but none at roof peak. Roof edge detail overhang extended to hide the thickness of the over roofing rigid insulation. Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation. Depending on your needs there are different variations of roofing membrane to choose from ranging from the lightweight to heavy weight.

The old roof was tar and gravel so the switch to tpo should show significant change. It is an acceptable practice to install a new roof over an existing roof membrane system provided that the roof deck is. Without a membrane vapour would rise and penetrate into the roof and 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.