How much does loft insulation cost in Bristol?

We could not find a published loft insulation price list for Bristol alone. The figures below are UK ranges from named 2026 guides, collected on 12 November 2026. They show what is normal. They are not a quote from us or from any other firm.

Loft insulation cost by house type

Prices for mineral wool laid to 270mm, fitted by a professional, vary a lot between guides. Here is what each one says.

Book a Builder (20 June 2026) prices a semi-detached house with a 40 to 60 m² loft at £400 to £700 for a top-up to 270mm, and £700 to £1,200 for a full installation that includes clearing the old material. Its introduction gives a different top-up range, so treat the exact figure with care.

Loft insulation cost per square metre

Our starting rate for mineral wool loft insulation is from £10 per m². SuperFOIL starts from £45 per m². The price of your job depends on the size of the loft and what it needs.

How much insulation does a loft need?

The government recommends at least 270mm of mineral wool, according to the Home Owners Alliance (updated 8 October 2026). Book a Builder prices a top-up below a full installation, so ask for the depth you already have to be checked first.

What adds to the cost

• Removing old insulation. The Home Owners Alliance gives about £250 for a day’s labour, plus a skip or waste removal.
• Loft clearance. Book a Builder gives £100 to £400.
• Ventilation. Book a Builder gives £50 to £150 for ventilation trays. We include lap vents where needed.
• Pipework. Insulating pipes costs £6 to £35 per metre (Checkatrade, via Home Owners Alliance).
• Boarding. About £55 per m² for basic boarding (Home Owners Alliance) up to £80 to £100 per m² for raised boarding (MyJobQuote).
• Access. A loft with no safe way up may need a hatch or ladder. Ours start from £200 and £150.

Labour costs

MyJobQuote (12 October 2026) gives £150 to £250 a day. Book a Builder (20 June 2026) gives £150 to £250 per installer per day, higher in London and the South East. The Home Owners Alliance gives £250 a day.

What we include

Where it is needed, waste removal, anti-fungal timber treatment, hatch insulation and draught proofing, tank and pipe insulation, lap vents and a completion certificate are included at no extra charge. Ask us to confirm what applies to your loft.

Grants

Some households can get help with insulation costs through government-backed schemes such as ECO4. Whether you qualify depends on the scheme rules at the time. We can advise.