Underfloor Insulation

Underfloor Insulation

Cold floors and draughts

Suspended timber floors are common in homes built before the 1950s and are a major source of draughts and heat loss. Air from the ventilated void below passes straight through the gaps between boards. Insulating between the joists, with a breathable membrane to hold it in place, makes rooms noticeably warmer and reduces heating demand. Solid concrete floors can also be insulated, usually when the floor is being replaced or built up.

What the survey covers

• Floor construction, joist depth and whether there is access from below or the boards need lifting
• Condition of the timbers, including any signs of rot, woodworm or damp
• Sub-floor ventilation, air bricks and ground condition in the void
• Services running under the floor, including pipework that should be insulated at the same time
• Recommended insulation type and thickness, and draught-sealing of the perimeter and board gaps
• Options for solid floors where a new floor build-up is planned

What you receive

A photographic report and specification that can be priced by a builder or insulation installer, and a note of any ventilation or repair work that must come first so that the floor stays dry.

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