Flat Roof Dormer Insulation

Now to the actual question how can you insulate a dormer roof.

Flat roof dormer insulation.

Since the dormer extends 2m outwards i can only imagine the insulation was either put there when the house was built or when if dormer roof was re roofed. We also have insulation boards suitable for more specialist roof applications for example inverted roof insulation and balcony insulation. 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. The traditional cold deck flat roof system is to install the insulation between and under the joists with ventilation below the timber deck.

However after taking some photos on the flat roof it is apparent there is already some kind of insulation present. Achieving a u value of 0 20w m meaning your roof will be better insulated than your walls will need 120mm thickness of rigid foam or 200mm of mineral wool or natural insulation. The rigid insulation method requires the utilisation of 150mm thick insulation in between the rafters along with a 50mm air gap in order to avert cold bridging. They lose loads of heat and are prone to leaking causing the materials to deteriorate.

Unfortunately too many dwellings suffer from this problem. Cold roof a very bad idea. To produce a hot roof rigid insulation is fitted outside above the weatherproofing. This is then covered with a further weatherproofing layer.

We have a wide range of roof insulation products including flat roof insulation tapered insulation and pitched roof loft insulation. Given below are 3 of the most popular methods by which you can insulate your dormer roof and the best way to tackle this task to achieve the desired results. Insulating a dormer roof to insulate a new dormer the same three methods can be used however there are changes to the construction method that can be used. When using the rigid form of insulation it is possible to place counter battens underneath the battens used for the tiles or slates.

With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same. Tlx silver is a vapour barrier and this structure gives no risk of surface or interstitial condensation.