Removing spray foam is one stage of a larger project. Once the loft is clear, decisions about replacement insulation can shape both your home’s energy performance and how lenders and surveyors view the property in future.
Mineral wool insulation
Mineral wool (sometimes called rock wool) remains one of the most widely accepted UK options. It is breathable, fire-resistant and well understood by surveyors and lenders. It can be installed between joists, between rafters or both, depending on whether the loft is used as living space.
Rigid insulation boards
For loft conversions or warm-roof projects, rigid PIR or PUR boards are a common choice. They provide high thermal performance per millimetre, but installation must respect ventilation paths to avoid recreating the original problem.
Natural insulation options
Sheep’s wool, wood-fibre and similar natural products are increasingly available in the UK. They perform well thermally and handle moisture more forgivingly than synthetic alternatives — although cost per square metre is usually higher.
Getting the documentation right
Whichever option you choose, make sure the installer provides a clear written specification, building control sign-off (where required) and product certificates. That paperwork is what surveyors will look for when the property is next valued.
Need Independent Advice?
The National Spray Foam Advisory provides free, written guidance to UK homeowners affected by spray foam insulation. If you would like a tailored view of your situation, download our free guide or contact us for a no-obligation advisory pack.
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