How To Do A Warm Flat Roof

Due to the insulation being over the top of the roof the timber structure beneath is warm which is why the term warm roof is formed.

How to do a warm flat roof. Both these variants require different approaches to insulation which will be covered in this guide. Because the warm roof method makes sure all of the roof structure is insulated it s a more energy efficient option over a cold roof. Simply brush off any debris that is present secure insulation boards to the surface and then lay down your flat roof covering over the top. A warm flat roof is formed by placing a layer of insulation over the top of the roof structure.

Flat roofs are hard to replace. Apply two coats of bright white elastomeric paint to your flat roof to increase its solar reflectivity. Insulation material is placed on top of the roof rather than in between the ceiling and the decking. For cold flat roofs the vapour layer needs to be positioned underneath the insulation layer on top of the room below to create an effective barrier.

Add the plywood once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing. If you get a chance to replace your ceiling then you should consider installing a layer of foam insulation under your roofing is ideal. Insulation is placed in between the joists underneath the roof surface above. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology.

This effectively regulates heat absorption and temperature keeping your building warm or cool depending on the season. The 8 step process for diy installation step 1. When timbers are used in flat roofing they obviously need to be waterproofed so boards are normally laid across the joists and then a felt or rubber is used to cover the boards to make them waterproof. On a warm flat roof the layer is installed underneath the insulation to stop moisture interacting with it through rising thermal pressure lower down in the building.

Steve from london flat roofingexplains how warm flat roof construction works in this excellent short video. This could mean flat roofs may not raise the same red flags they used to. How to insulate a flat roof. Frame the roof one important and perhaps not so obvious fact is that a flat roof is not actually flat.