How To Insulate A Flat Roof Attic

However if you have a cathedral style garage roof you will need a scaffolding to get into the upper areas of the roof.

How to insulate a flat roof attic.

It should be installed on tapered 2x furring strips in order to slope the surface of the roof to drains. A flat roof should preferably be insulated from above. See below for a shopping list and tools. This technique involves placing insulation directly between the ceiling of the upper floor and the attic floor which prevents heat from penetrating the attic.

If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder. If 180mm is to be installed then 100mm board might be introduced between the rafters there has to be a minimum 25mm air gap between the insulation and the underside of the tiles or slates with an 80mm board running across the rafters. In either case you will need to follow the general steps below to insulate your garage roof. With a warm roof the usual process is to split the insulation into two layers.

Rigid foam panels are available in thickness. This is best done when the roof covering needs replacing anyway. Sealing bypasses bypasses are anywhere that there is a break in the insulation. With flat roof insulation a vapor barrier should sit between the joists and ceiling panels and the insulation on top.

With this method only the attic floor is insulated. The simplest and cheapest solution for attic insulation is the so called cold attic. Then install r 30 fiberglass batts between the rafters. A layer of rigid insulation board can be added either on top of the roof s weatherproof layer or directly on top of the timber roof surface with a new weatherproof layer on top of the insulation.

Use rigid foam insulation panels on your flat roof before applying the final roof covering or inside the house before adding sheetrock or paneling.