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Insulation Requirements

Building regulations are demanding ever increasing levels of insulation in the fabric of the building – and roofs are definitely included.   Although Building Regulations are designed to affect new buildings, any refurbishment that involves more than 25% of the roof area will have to comply with the new regulations.

There are specific requirements for the insulation levels to be achieved by the roof area and the type of insulation you choose will depend on the use of the roof space.

If you have a cold roof (ie one that is not used as living space) then the solution is likely to take the form of mineral wool insulation placed between the joists that form the floor of the loft.  The mineral wool should be 270mm deep to give the best effect.

If you have a loft conversion the insulation is most likely to be installed directly under the roof tiles in between the rafters – in which case it will take the form of insulation boards fixed permanently to the structure of the roof.

When you have a new roof your roofing contractor will automatically consider insulation as part of the job. However, if you are just looking to upgrade the insulation levels of your existing roof it is worth looking into the grants that are available to cover the cost.  The Energy Saving Trust can provide information on how to get these.