How To Insulate A Flat Roof Extension

Contractors installed new flat roof above shower room and kitchen extension with no insulation.

How to insulate a flat roof extension.

Reduce extreme temperature fluctuations inside your home. They lose loads of heat and are prone to leaking causing the materials to deteriorate. Insulating a flat roof how much gap should i leave in between insulation and top of the roof. Although cold roof systems were used extensively in the past they are now considered out of date and are highly inadvisable.

Wondered if anyone else has come across a similar challenge what you did please. 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. I have been asked if the flat roof of my one storey extension could be used for access when they insulate the outside of the party wall with external wall insulation. The extension is for a quite small kitchen and bathroom very cold in winter.

Many properties use this option as there are no additional costs for scaffolding or organising how to gain safe access to the roof exterior. I ve recently had two. To produce a hot roof rigid insulation is fitted outside above the weatherproofing. This is then covered with a further weatherproofing layer.

Hi i have a flat roof extension built in the 1970s. The insulation material is placed between the supporting joists leaving a gap of 50 60mm between the roof and insulation. While insulation for a flat roof is expensive and can account for as much as 25 of the total installation cost there are a number of important benefits to having it in place. Why its important to insulate your flat roof.

As a refurb project i m resigned to not being to be able to meet best practise for new builds. Cold roof a very bad idea. 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. With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same.