Flat roof or sloping ceiling insulation

Priority for Completion: Medium

This recommendation is triggered when a flat or sloping roof is present and there is no evidence of it having been insulated. The exact benefit will depend upon a wide range of factors including the heating system, the cost of the fuel and the occupancy of the home together with the room's size and shape. Generally, insulating a flat or sloping roof can prevent a significant amount of heat loss from a property so the savings can be substantial. However, installing the insulation usually requires significant investment and works. There are also other factors to be considered so expert advice should be sought. As such we have rated this as being a recommendation of medium priority for completion.

However, where appropriate, we would strongly recommend that insulation is installed as part of any major home refurbishment.

What is flat or sloping roof insulation?

Flat or sloping roof insulation can usually be applied to the internal or external surface of the current roof. Once applied it will be covered over, usually with plasterboard and plaster internally or with a suitable waterproof membrane or covering material externally.

Obviously fitting internal insulation usually requires redecorating and may reduce the room height depending upon the type and quantity of insulation installed. The impact of this reduction is most significant in small rooms but is not likely to be a major consideration in larger spaces. It will also require the removal and refitting of anything fitted to the ceiling.

Installing flat or sloping roof insulation

Insulating flat or sloping roofs should not normally be attempted without obtaining professional expert advice. Depending on the work undertaken it may be possible for someone with very good DIY skills to complete this task.

Other considerations

Depending upon the exact details of the work undertaken Building Control approval may be required.