Roof Insulation Requirements Uk

Currently uk building regulations stipulate that a minimum depth of 270mm is required to adequately protect your home and keep it properly insulated.

Roof insulation requirements uk.

A flat roof should preferably be insulated from above. Depending on where you live in the uk snowfall must also sometimes be considered in determining the gradient of the fall. Mineral wool rolls are ubiquitous and cheap meaning a whole roof on a standard home could be insulated to the recommended 270mm with a spend of little more than 200. Insulation can be placed between the ceiling joists.

If the roof has no ceiling then the insulation can be placed between the rafters and ventilation maintained as described above in which case the ridge should also have vent tiles installed to allow for through. Insulating a roof is perhaps the easiest of all the energy saving home improvements. If you are replacing more than 25 of the roofing area then you will also need to replace the thermal insulation. Column a is for extensions where the existing dwelling s walls and roof u values are worse than 0 70 w m k in the walls and worse than 0 25 w m k in the ceiling.

These regulations deal with the conservation of fuel and power and with isolation. The actual regulations require that loft insulation should be at least 270 mm thick and must have good thermal properties. The saint gobain insulation uk product portfolio has a solution to help meet the requirements of the scheme. Building regulations and standards set the levels of thermal insulation required when carrying out building work either for new build or refurbishment projects.

A layer of rigid insulation board can be added either on top of the roof s weatherproof layer or directly on top of the timber roof surface with a new weatherproof layer on top of the insulation. If you had your insulation fitted after 2013 then you might be okay because it was at this time the government stated that if a loft insulation was 125mm in thickness then it would be considered insulated. Summary of flat roof building regulations. In 2006 the uk adopted new building regulations parts l1 and l2 which are enforced in the building industry.

Care should be taken not to block any ventilation at the edges eaves. Again the thickness will vary depending on the material you choose to use. It s also within the capability of most diyers although not the most pleasant of tasks. This is just under a third of a metre which may seem like quite a lot to you.

If your loft was insulated in the 60s then no because the recommended value was only 25mm. If you are installing loft insulation as part of a roof renovation project where more than 25 per cent of the roof is being renewed then the level of insulation should meet the standards required by building regulations approved documents.