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Flat Roof Insulation

Warm Roof Insulation 


- Removal of old roof covering and structure checked beneath with all structural work being corrected (if necessary).



- Installation of 100mm rigid foam board insulation.



- Installation of 18mm exterior wooden board.



- Firestone rubber roof covering put in place with all flashing kits installed to conform with a tiled or slate roof depending on roof surface.



- All fascia's, gutters and downpipes adjusted to fit new roof height as well as colour matched.

Benefits of warm roof insulation

- Warm flat roofs create little or no thermal bridging.                                            

- Warm roofs allows heat to be retained within the property.

 Warm roofs are simply insulated more efficiently than cold roofs

because of the way they are formed.


- When retrofitted, warm roofs can be considerably cheaper

to install than a cold roof. This means saving money that can be

spent on improving other areas of the building.

This ensures there is no unnecessary heat-loss through joints or


- A warm roof is breathable, allowing moisture out.

A breathable roof ensures there is no moisture build up which can

lead to fungal or mould growth.


- A warm flat roof can be retrofitted without too many

complications. This means that in some cases (not all) the

roof can be fitted right over the existing roof.



Cold Roof Insulation


1.Lay 12mm of plywood or OSB board across the timber joists as a base for the flat roof build-up


- Install a vapour control layer to reduce the risk of condensation and moisture compromising the flat roof structure


- Mark out on the vapour control layer where fixings will pierce the membrane (at rafter centres and at the correct axial spacing)


- Place butyl tape at each point where the vapour control layer will be pierced so the tape forms a seal after penetration


- Often dictated by the height available thanks to guttering, upstands and other adornments, lay rigid insulation board to the desired thickness


-Install a second layer of plywood or OSB board


-Fix the deck together with helical fixings, piercing each layer of the build-up including the flat roof insulation


- Finally, install a waterproof membrane to finish off the deck and protect the build-up from wind and driven rain.



Benefits of cold roof insulation:

•Warmer space during cold outside temperatures


•Cooler space during hot summer weather


•Reduced carbon emissions


•Reduced energy consumption


•Lower heating bills


•Improved energy rating


Get in touch

Atrium House, Manchester Road,

Bury, BL9 9SW

0161 509 2429

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