Draught-proofing for Porthmadog properties
Porthmadog is among the towns we cover in Gwynedd, alongside Caernarfon and Bangor. It is around 19 miles south of Bangor.
Small measures like this are often among the cheapest per pound saved, and they suit Porthmadog homes of every age. We check ventilation as carefully as insulation in Porthmadog homes, because both matter for keeping a house dry.
As for paperwork, 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.
Ventilation still matters
Trickle vents, air bricks and extractor fans are there for a reason. We seal accidental gaps, not the ventilation your home needs to keep condensation down.
What is included in Porthmadog
- Skirting and floor gap sealing
- Door and window seals
- Letterbox and keyhole covers
- Loft hatch seals
Guide prices for Porthmadog
| Draught-proofing guide prices | Guide price |
|---|---|
| Whole-house draught-proofing | £195–£495 |
| Doors and loft hatch only | £145–£295 |
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.
From enquiry to finish in Porthmadog:
Tell us about the property
Postcode, property type and what you would like done.
Free survey
Access, condition, existing insulation and ventilation checked.
Written result and price
What we recommend and a fixed price before any work.
Work and tidy-up
Fitted at an agreed time, with ventilation kept clear.