Insulating Flat Roof Dormer

Flat roof dormer the traditional cold deck flat roof system is to install the insulation between and under the joists with ventilation below the timber deck.

Insulating flat roof dormer.

Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation. To produce a hot roof rigid insulation is fitted outside above the weatherproofing. This is then covered with a further weatherproofing layer. I have a 4 bedroom waites dormer chalet style house think of a very large bungalow with 2 bedrooms and a bathroom built into the roof.

Along both lengths of the house on either side of the upstairs bedrooms are very large eaves. Warm deck flat roof insulation is now the standard way to insulate a flat roof click to enlarge flat roofs for example on extensions bathrooms and dormer windows are not the best of ideas. These rooms are very cold the walls are just boarded. In this video i look at how this has happened and the way to resolve t.

Tlx silver can be used to reduce the thickness of additional insulation required between the joists to help ensure a ventilated gap is maintained between the insulation and the deck. Insulating the roof walls of a dormer chalet style house. How to insulate a dormer roof when making for changes to a dwelling or when constructing a new dwelling it must comply with the current building regulations when altering the insulation in a dormer part l of the building regulations must be adhered to. Why spray foam does it better.

Cold roof a very bad idea. Dormer roofs are roofs that contain rooms and can present considerable challenges when it comes to insulation. Out of all the above mentioned common methods of insulating dormer roofs the most dependable and preferred is spray foam insulation for the following reasons. Dormer bungalows also known as dutch bungalows were built quite widely in the uk.