Re-rendering, repairs and upkeep

Re-rendering

Re-rendering means removing failed or cracked render, checking and repairing the wall underneath, and applying a new render system. Because the scaffold and preparation are already paid for, it's also the natural moment to add insulation — and in England and Wales, re-rendering more than half of a wall brings in Building Regulations energy rules.

Old render hacked off and removed from site
Brickwork and mortar checked and repaired before rendering
Choice of silicone, mineral, lime or monocouche finish
Option to add insulation at the same time
In England and Wales, Building Regulations apply when more than half of a wall is re-rendered
Beads, cills and drips renewed so water is shed properly

Get a guide price See prices

A worker on scaffolding hacking off old cracked render to expose the brick wall underneath

Free survey for re-rendering

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Why should I think about insulation when re-rendering?

In England and Wales, replacing render on more than half of a wall's area is treated as renovating a thermal element, so the wall is expected to be upgraded to about 0.30 W/m²K where that's technically, functionally and economically feasible. The scaffold, preparation and finish are being paid for anyway, so the extra cost of insulation is lower than doing it later. We price both options.

Typical build-up

Removal: Hack off and dispose
Preparation: Mortar, brick and crack repairs
New system: Silicone, mineral, lime, monocouche or EWI
Approvals: England and Wales: Building Regulations when more than half of a wall is renewed
Typical duration: 1–3 weeks for a house

What's involved in stripping old render?

The render is hacked off, usually with breakers, and the debris bagged or skipped. The wall is then inspected: loose bricks, eroded mortar and damp spots are repaired, and the surface is prepared to suit the new system.

Which new render should I choose?

On older solid walls, breathable lime or a mineral system is often safest. On sound modern masonry, silicone over a mesh base coat gives a durable, low-maintenance finish. If insulation is added, the finish is the one specified for the EWI system.

Re-rendering prices

Re-rendering guide prices
Item	Guide price	Notes
Strip and re-render (silicone system)	£90–£150 per m²inc VAT	Excluding scaffold
Strip and insulate (EWI)	£125–£195 per m²0% VAT	Including removal
Waste and skip	Included

Guide prices are confirmed by a fixed written quote after a free survey. Prices include VAT at 20%. 0% VAT: installing insulation in a home is zero-rated until 31 March 2027, so these figures are the total; 5% applies from 1 April 2027.

How it works

Tell us about the property
Use the quote tool or form, or call free on 0800 088 6248.
Free survey
We measure the walls, check condition and confirm planning and building control.
Fixed written quote
The system, details, access, exclusions and VAT, in writing. Anything hidden is priced and agreed before extra work.
Installation and handover
Work planned around the weather, then inspected and documented.

Re-rendering: questions

Do I need building control for re-rendering?

In England and Wales, re-rendering more than half of a wall's area — or more than a quarter of the whole building's envelope — is controlled work under Part L, so usually yes. We explain how it's handled in the quote.

How do I know if my render has failed?

Signs include cracks, hollow sound when tapped, bulging, pieces falling off, and damp patches inside behind cracked areas.

Can I re-render just one wall?

Yes, though matching colour and texture to the other walls may mean recoating them too.

Is it worth adding insulation?

On solid or concrete walls it's usually the most cost-effective time to do it, because access and preparation are already paid for.

Reviewed 19 October 2026 by the Render and Insulation technical team.