Where we work around Porthmadog

Porthmadog is about 21 miles from Bangor (Gwynedd) as the crow flies.

Other towns close by include Pwllheli.

Postcode districts	LL49, LL48, LL47
Council area	Gwynedd
County or area	Gwynedd

What is loft insulation?

We lay the first layer to the depth of the joists, usually 100 mm, so it fills each bay edge to edge with no gaps. The second layer goes across the joists at right angles, which covers the timber and stops it acting as a cold bridge. More about loft insulation.

Cables lifted clear of the insulation where possible
Eaves kept clear, with ventilation trays where air could be blocked
Area under the cold water tank left clear so it cannot freeze

Why book with us in Porthmadog

We measure before we quote

Existing depth, joist spacing, wiring and the tank are checked, not guessed.

Boarding done properly

Storage boards go on loft legs, never straight onto the insulation.

No pressure selling

You get everything in writing and decide in your own time.

Downlights made safe

Fire-rated covers or a clear zone around recessed lights.

How much does loft insulation cost in Porthmadog?

£495 to £745Terraced house, average loft, from bare joists. Free survey and a fixed written quote before any work.

Installing insulation in a home is zero-rated for VAT until 31 March 2027 and 5% after that, under HMRC's rules for energy-saving materials (notice 708/6).

Work out a guide price for your loft

Building regulations in Wales

Wales has its own Approved Document L. Insulation alone is not normally notified, but conversions need building control. How the rules work across the UK.

Questions about loft insulation in Porthmadog

Is loft work in Porthmadog different from anywhere else?

The method is the same, but older terraces, cottages and newer estates each have their own quirks: lath ceilings, low pitches or trussed roofs. We plan for the loft we find.

Do you charge extra to travel to Porthmadog?

Not normally. Our guide prices include normal travel to Porthmadog. If an address needs a ferry or an unusually long journey, we tell you the cost before you book.

Do you take on jobs outside Porthmadog?

Yes. We also work in Pwllheli and Caernarfon and elsewhere in Gwynedd.

Can you insulate around downlights?

Recessed downlights need clearance or a fire-rated cover so they do not overheat. We fit covers where needed and leave a clear zone around fittings that cannot be covered.

Will loft insulation make my loft colder?

Yes, and that is expected. The insulation keeps the heat in the rooms below, so the loft above runs closer to the outdoor temperature. That is why pipes and the tank are lagged as part of the job.

Loft insulation in Porthmadog