Loft insulation for Porthmadog properties
Porthmadog sits in Gwynedd, around 19 miles south of Bangor. We work across the LL49 district, including nearby Caernarfon and Bangor.
We check ventilation as carefully as insulation in Porthmadog homes, because both matter for keeping a house dry. Small measures like this are often among the cheapest per pound saved, and they suit Porthmadog homes of every age.
For regulations, if cavity wall insulation follows in Porthmadog, filling a cavity is notifiable work under the Building Regulations as they apply in Wales, usually self-certified through a competent person scheme.
Funding in Wales
In Wales, Warm Homes Nest offers free improvements to eligible low-income households, and ECO4 runs to 31 December 2026.
Sources: Welsh Government: warmer and more energy efficient homes (July 2026); GOV.UK: extending the ECO4 end date, government response.
What we check
Existing depth and condition, ventilation at the eaves, water tanks and pipes that need insulating, downlighters that need covers, and storage boarding that needs raising so insulation is not crushed.
What is included in Porthmadog
- Mineral wool to the recommended depth
- Loft hatch draught-proofing
- Depth and ventilation check
- Tank and pipe lagging
Guide prices for Porthmadog
| Loft insulation guide prices | Guide price |
|---|---|
| Loft insulation to 270mm, typical house | £395–£895 |
| Loft top-up from 100mm | £295–£595 |
No VAT is charged on installing insulation in homes until 31 March 2027 (then 5%). Guide ranges only: the fixed price is confirmed in writing before any work starts, and anything that could not be seen at survey is agreed with you first.
What happens next for a Porthmadog property:
Get in touch
Online, by phone or WhatsApp.
Survey visit
We check the space, what is there now and how it is ventilated.
Your quote in writing
A fixed price, with any extras listed separately.
Booked work
Carried out by the installer named on your quote.