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Fix SoonCommon in SepRecommended trade: Rendering Specialist

Render Bulging from Wall

A visible bulge in the external render where it has separated from the wall but not yet fallen away.

What Is Causing This?

  • 1Water trapped behind the render expanding in frost
  • 2Render debonding from the substrate
  • 3Structural movement pushing the render outward

How Urgent Is This?

Fix Soon

This should be fixed in the coming weeks. Leaving it may allow the problem to worsen and cost more to repair.

What Needs to Be Done

A rendering specialist will carefully remove the bulging section, check for damp or movement behind, prepare the wall, and re-render with proper bonding and mesh.

How Much Will It Cost?

£1,267 – £3,500

National average estimate

Labour: £850 – £2,233 | Materials: £417 – £1,267

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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.

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Enter your postcode above to find local rendering specialists, or browse all rendering specialists.

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Planning Permission Guidance

Some fixes for this problem may require planning permission or building regulations approval. Check if your project needs permission:

External Wall Insulation

Whether external wall insulation needs planning permission depends on the visual impact. Adding 50 to 100mm of insulatio...

How to Prevent This

Address bulges promptly before they fall and cause injury. Fix any damp behind the render before re-rendering. Use mesh reinforcement in all new render work.

Related Problems

Render Falling Off Wall

Sections of external render detaching and falling from the wall, exposing bare brickwork or blockwork.

Render Cracking on Exterior Wall

Cracks appearing in the external render, ranging from hairline to wide splits that expose the masonry beneath.

Other Rendering Specialist Problems

Render Cracking on Exterior Wall

Cracks appearing in the external render, ranging from hairline to wide splits that expose the masonry beneath.

Render Falling Off Wall

Sections of external render detaching and falling from the wall, exposing bare brickwork or blockwork.

Damp Coming Through Render

Damp patches visible on internal walls that correspond to areas of external render, especially after rain.

Render Turning Green

External render developing green algae or moss growth, making the walls look dirty and neglected.

Frequently Asked Questions

What causes render bulging from wall?
Water trapped behind the render expanding in frost. Render debonding from the substrate. Structural movement pushing the render outward.
Is render bulging from wall serious?
This should be fixed in the coming weeks. Leaving it may allow the problem to worsen and cost more to repair.
How much does it cost to fix render bulging from wall?
Typical costs range from £1,267 to £3,500 depending on severity and location. Get a free quote from a local rendering specialist on Tradesfolk.
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