New Flat Roof Insulation Regulations

On new build or replacement pitched roofs the ideal build up would be insulation fitted over and then between the rafters giving a big boost for airtightness image credit.

New flat roof insulation regulations. Our guides to building regulations in wales adl1a 2014 building regulations. The below drawing shows the u value requirements set out for new properties in the building regulations for each element walls floors and roofs. If the new roof covering is going to be different than the old one and this will affect the roof in the event of a fire. The bs 6229 code of practice is the go to flat roofing document and along with relevant trade association guidance should form the minimum standards the industry is looking to achieve for every roofing project for copies of bs 6229.

Kingspan with a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same. Warm deck the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications. How to insulate a dormer roof when making for changes to a dwelling or when constructing a new dwelling it must comply with the current building regulations when altering the insulation in a dormer part l of the building regulations must be adhered to. Ventilation is required for these roofs.

Ecotherm in flat roofs. A u value of 0 55 w m k is used for cavity insulation and 0 30 w m k for internal or external wall insulation. The performance of the new covering will be significantly different to that of the existing covering in the event of a fire. Wales new dwellings.

Some key points of the building regulations are. Up to 25 of a buildings heat loss is through the roof. You carry out structural alterations the performance of the new covering will be. By using insulation with excellent thermal performance this will greatly improve the energy efficiency of the building and in turn make meeting building regulations standards easy.

You will need approval however if. Summary of flat roof building regulations. Ideal for both new build and existing roofs replacing or refurb. You are replacing repairing more than 25 per cent of the roof area in which case the roof thermal insulation would normally have to be improved.

If you want to carry out repairs on or re cover less than 25 per cent of the area of a pitch or flat roof you will not normally need to submit a building regulations application. However there should be no excuse to ignore the code in new build scenarios. If you are replacing more than 25 of the roofing area then you will also need to replace the thermal insulation.