Render Repairs
Cracked, blown or stained render restored to a seamless, like-new finish — fast, properly diagnosed, and colour-matched so the repair disappears into the wall.
What type of render damage do you have?
The right fix depends on the right diagnosis. Here's how to read the signs — and what each type of damage usually means for the repair approach.
Hairline Cracks
- Looks like
- Fine lines following mortar joints, window reveals or corners. May be barely visible until the surface gets wet.
- Often caused by
- Normal building movement, thermal expansion and contraction, render shrinkage as it cured. Very common in older render.
- What we do
- Often repairable in-situ if shallow and isolated. We'll tap-test adjacent areas to confirm there's no underlying hollowness before quoting.
Hollow or Blown Render
- Looks like
- A dull thud or hollow sound when tapped. May show web-pattern cracking, bulging or render visibly pulling away from the wall at edges.
- Often caused by
- Loss of adhesion to the substrate — typically from damp ingress, frost action on a porous render, or poor bonding during original application.
- What we do
- Must be cut back to sound substrate. Plastering directly over hollow render is false economy — it will fail again. We remove the defective section fully before reinstating.
Staining or Spalling
- Looks like
- Dark tide marks running from cills, reveals or parapets. White salt deposits (efflorescence) on the surface. Flaking or pitting of the outer coat.
- Often caused by
- Penetrating damp through failed flashings, defective cills or coping stones — water finding its way behind the render and reappearing at the surface.
- What we do
- Address the water source before touching the render. If the source is fixed, staining can be treated and affected areas re-rendered. Coating over damp render without fixing the cause is a short-term patch at best.
Unsure which category your render falls into? Book a free inspection — we'll tap-test, probe and give you a clear, honest picture of what's wrong and what the repair involves. No guesswork, no upsell.
Real benefits for your home — not just features on a spec sheet
Stops water ingress early
Cracked or blown render lets water behind the system, risking damp and structural damage over time. Prompt, proper repair closes that route before it becomes a bigger problem.
Seamless colour and texture match
Repairs are matched to the existing render's colour, texture and coat build-up, so the finished result blends in rather than standing out as a visible patch.
Faster than a full re-render
Targeted repair to the affected area, rather than stripping and replacing an entire elevation, means less disruption, lower cost and a quicker turnaround.
Extends the life of the existing system
Addressing defects properly — rather than papering over them — extends the working life of render that's otherwise sound, protecting your original investment.
Proper diagnosis, not guesswork
We tap-test and inspect before quoting, so you get an honest assessment of what's actually wrong and whether repair or fuller work is the right call.
How we deliver it
A clear, considered process from first survey to final sign-off — no surprises along the way.
- 01
Inspection & diagnosis
We tap-test the render to identify blown or hollow areas, check for the underlying cause of cracking or staining, and confirm the full extent of the defect.
- 02
Removal of defective render
Affected render is carefully cut back to sound, well-bonded substrate, with edges prepared cleanly so the new render keys in properly.
- 03
Like-for-like reinstatement
The repair is built up in the same coat sequence and system as the surrounding render, including mesh reinforcement where needed at the repair boundary.
- 04
Colour & texture matching
Texture and colour are matched as closely as possible to the existing finish, blending the repair into the surrounding elevation rather than patching over it.
- 05
Final inspection
A final check confirms the repair is sound, weathertight and visually blended, with the site left clean before we hand back.
What's included
Every layer of the system is specified for performance, not just appearance.
Matched render systems
Silicone, protective coating or traditional renders applied to match the existing system already on the property, rather than a generic patch.
Bonding agents & primers
Specialist primers and bonding agents at the join between old and new render, ensuring long-term adhesion rather than a repair that fails again.
Mesh reinforcement at boundaries
Reinforcing mesh is dressed into repair edges to control cracking along the new-to-old join, the most common point of failure in poor repairs.
Manufacturer-Backed Warranty
Our own workmanship guarantee on every repair, reflecting our confidence in proper diagnosis and like-for-like reinstatement — if it fails, we fix it.
Request your free quoteCommon questions
How do I know if my render needs repair or full replacement?
Watch for cracking (especially stepped or wide cracks), a hollow sound when tapped, staining, bulging, or render that's visibly detaching. Isolated issues are usually repairable; widespread cracking or blown render across an elevation often points to a full re-render being more cost-effective. We'll give you an honest recommendation during survey.
Will the repair be visible afterwards?
We colour and texture-match repairs to the surrounding render as closely as possible. Some minor visual difference can remain immediately after work, particularly on older, weathered render, but this typically settles as the new section weathers in.
How quickly can repairs be carried out?
Most isolated repairs can be completed within a few days, weather permitting, often without full scaffolding depending on location and extent.
Does home insurance cover render damage?
It depends on the cause — storm or impact damage may be covered, while general wear, ageing or poor original installation typically isn't. We're happy to provide a written report and photos to support an insurance claim where relevant.
Ready to transform your property?
Get a free, no-obligation quote from Yorkshire's premium rendering and insulation specialists. We typically reply within one working day.