Because most flat roofs don t have an attic crawl space or venting the insulation must go underneath the roof s covering on the exterior of the home or be placed on the inside of the home.
Exterior flat roof insulation.
The insulation material is placed between the supporting joists leaving a gap of 50 60mm between the roof and insulation.
Roof types the various types of roofs found on homes sheds garages and other buildings fall into one of the following categories.
Flat expanded polystryene eps roof insulation is suitable for use with all roofing membrane materials flat eps roof insulation is compatible with loose laid and attached single ply membranes conventional built up roofing or modified bitumen systems.
Gable roofs hip roofs intersecting roofs butterfly roofs mansard.
The type that is right for your flat roof insulation job depends upon the state of the roof expert opinion on the best type and your budget.
And it will be important to maintain the correct ratio of interior to exterior insulation.
You need sufficient exterior insulation typically.
Flat expanded polystryene eps roof insulation provides high long term r value of eps and labor saving face laminates.