Loft insulation in new-build homes

Recently built homes are usually insulated to a good depth by the builder. They seldom need a full job, but there is often something worth fixing: missing patches, a poor hatch or squashed insulation.

At a glance
BuiltRoughly 2000 onwards
Typical roofTrussed rafters, breathable membrane
Usual stateDeep insulation fitted by the builder
Watch forGaps, compressed patches, uninsulated hatches, storage limits

Do you need more?

Building regulations have required good levels of loft insulation for decades, and newer homes generally have a deep layer already. It is still worth a look: insulation is sometimes missing in corners, pushed aside by electricians or plumbers, squashed where people have stored boxes on it, or left off the hatch altogether.

Storage in a new-build loft

Most new homes have trussed rafters, designed for the roof and not for heavy storage. Many developers advise that the loft isn’t used for storage at all. Check your home’s documentation or ask the developer before boarding. If light storage is acceptable, raised boarding keeps the insulation at full depth.

Under the warranty period

If your home is still within its builder’s warranty and you think the insulation is defective, raise it with the builder or the warranty provider first. Work by someone else may affect a claim.

Common questions

My new-build feels cold upstairs. Is it the loft?
It might be: check for gaps in the insulation, and whether the hatch is insulated and sealed. Draughts and ventilation can also be the cause.
Can I board my new-build loft?
Check what the developer says first. Many advise against storage in trussed lofts, or allow only light storage.

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