Why repairs come first
Energy Saving Trust advice is to fix brickwork, pointing, roofs, gutters and downpipes before filling. A filled cavity is less forgiving of a wet outer leaf than an empty one, so we price repairs separately and you choose who carries them out.
What is included
- Raking out and repointing
- Brick replacement
- Sill and render repairs
- Gutter and downpipe repairs
Repointing and pre-insulation repairs prices
| Repointing and pre-insulation repairs guide prices | Guide price |
|---|---|
| Repointing, per m² | £45–£75 |
| Brick replacement, per brick | £25–£45 |
| Minimum repair visit | £295 |
This work is not insulation, so it is normally standard-rated for VAT. Guide prices include VAT where it applies. 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.
Rules and funding by nation
The building regulations route and the funding schemes differ between England, Wales, Scotland and Northern Ireland. The local pages for your area explain the rules where you are; in short:
- England: Filling a cavity is notifiable building work and needs a building notice or competent-person self-certification.
- Wales: Filling a cavity is notifiable work under the Building Regulations as they apply in Wales, usually self-certified through a competent person scheme.
- Scotland: No building warrant is needed for insulation within a wall, but the work must meet the building standards.
- Northern Ireland: Inserting cavity wall insulation needs a building control application to the council before work starts.
Sources: Energy Saving Trust: cavity wall insulation; Planning Portal: cavity wall insulation and building regulations; Welsh Government: building work competent person schemes; Welsh Government: issues arising from cavity wall insulation installations; CIGA: the CIGA guarantee; HMRC: VAT on energy-saving materials (Notice 708/6).