Underfloor Insulation (UFI)
Underfloor Insulation is applicable to properties with suspended timber floors, common in homes built before 1970.
Installation Process:
Insulation material (e.g., mineral wool in netting, rigid boards) is secured between floor joists.
Access is via a crawl space or by lifting floorboards.
Draught-proofing may be included for additional energy efficiency.
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Benefits of Underfloor Insulation (UFI)
Key Benefits:
Reduces cold air infiltration from below.
Warmer floors and improved comfort, especially during colder months.
Saves up to £100–£200 annually on heating costs.
Suitability for ECO4:
Available to qualifying households with eligible floor types.
Particularly effective when combined with loft and wall insulation in a fabric-first retrofit.
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