How To Insulate A Flat Roof Extension

Why its important to insulate your flat roof.

How to insulate a flat roof extension.

Contractors installed new flat roof above shower room and kitchen extension with no insulation. With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same. Trying to insulate roof in 1970s extension to an old bungalow. Cold roof a very bad idea.

The insulation material is placed between the supporting joists leaving a gap of 50 60mm between the roof and insulation. Although cold roof systems were used extensively in the past they are now considered out of date and are highly inadvisable. 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. Due to a rewire i ve had to remove parts of the plasterboard ceiling and have found that there is no insulation in the roof i can see the roof deck and joists there is no vapour layer and the plasterboard is not foil backed.

How much gap should i leave in between the insulation and the top of the roof i m thinking of getting some kingspan to insulate. 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. Many properties use this option as there are no additional costs for scaffolding or organising how to gain safe access to the roof exterior. Hi i have a flat roof extension built in the 1970s.

Reduce extreme temperature fluctuations inside your home. I ve recently had two. As a refurb project i m resigned to not being to be able to meet best practise for new builds. Wondered if anyone else has come across a similar challenge what you did please.

They lose loads of heat and are prone to leaking causing the materials to deteriorate. The extension is for a quite small kitchen and bathroom very cold in winter. To produce a hot roof rigid insulation is fitted outside above the weatherproofing. Insulating a flat roof how much gap should i leave in between insulation and top of the roof.