Plaster Crack Repair London
Plaster cracks are common in London properties — from hairline fractures in new builds to structural cracks in period homes. While most are cosmetic, some indicate underlying issues. We repair all types of plaster cracks quickly and permanently, with solutions that prevent recurrence.
How much does plaster crack repair cost in London?
Plaster crack repair in London costs £80–£120 for small hairline cracks (raked out, filled and blended) and £150–£250 for larger cracks needing fibreglass mesh reinforcement. Repairs take 1–3 hours and dry in 2–24 hours. Recurring cracks signal underlying movement and should be investigated. London Plastering Service covers all 32 boroughs and quotes within 60 minutes.
- Hairline cracks £80–£120
- Large cracks £150–£250
- Fibreglass mesh reinforcement
- 1–3 hours per repair
- Dries in 2–24 hours
- All 32 London boroughs covered
Types of Plaster Cracks
Hairline Cracks
Very fine cracks (under 1mm wide) that appear as plaster dries and shrinks, or as buildings settle. Common in new builds (first 1–2 years) and recently plastered properties. Usually cosmetic and not structurally concerning.
Repair cost: £80–£120 per area
Settlement Cracks
Wider cracks (1–5mm) caused by building settlement — particularly in new builds, extensions, and after structural alterations. Often appear at junctions between old and new walls, or around doors and windows. Usually stabilise after 1–2 years.
Repair cost: £120–£200 per crack
Structural Cracks
Wide cracks (over 5mm), cracks that widen over time, or diagonal cracks running from corners of doors/windows. These indicate subsidence, foundation movement, or structural failure. A structural engineer should assess before repair.
Repair cost: £150–£250+ per crack
Recurring Cracks
Cracks that reappear after filling, typically at the same location. These indicate ongoing movement (thermal expansion, vibration, live load). Repair requires flexible fillers and mesh reinforcement, and sometimes addressing the underlying cause.
Repair cost: £150–£250 per crack (with mesh reinforcement)
Plaster Crack Repair Process
Assessment
We assess the crack type, width, and likely cause. Hairline and settlement cracks can be repaired immediately. Structural cracks may require an engineer's assessment first.
Preparation
The crack is raked out (widened slightly) to remove loose material and create a clean bonding surface. Dust is removed and the crack is primed with PVA to ensure adhesion.
Filling and Reinforcement
For hairline cracks: flexible filler. For larger cracks: jointing compound reinforced with fibreglass mesh tape. For recurring cracks: mesh is embedded across the crack to prevent re-opening. The filler is applied in layers, each allowed to dry.
Finishing
The filled crack is sanded smooth and blended with the surrounding wall surface. A thin skim coat may be applied over the repair for an invisible finish. The area is then ready for painting.
Crack Repair Projects in London
Crack repair — Camden
Ceiling crack repair — Camden
Filled crack — Camden
Ceiling crack filled — Camden
When to Worry About Plaster Cracks
Most plaster cracks are harmless, but some warrant professional investigation. Here's how to tell the difference:
Usually not a concern: Hairline cracks (under 1mm) that appear after plastering or in the first year of a new build. Cracks around door frames or window reveals (these are stress points). Cracks that are stable — not widening over time.
Worth investigating: Cracks wider than 2mm. Cracks that are diagonal (particularly from corners of doors/windows). Cracks that appeared suddenly or are widening. Multiple cracks appearing simultaneously.
Seek professional advice: Cracks wider than 5mm. Cracks accompanied by bulging or sagging walls/ceilings. Cracks that run through both plaster and masonry. Cracks after subsidence events (drought, tree removal, water leak). See our damaged wall plaster repair and cracked ceiling repair pages.
Plaster Crack Repair FAQs
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