Cracks & Structural Repair
Ceiling crack repair — know what the crack means, then fix it right
We tell harmless plaster cracks apart from slab problems, then repair with the right method so the crack does not come back.
Spotting a crack running across your ceiling is unsettling. Most ceiling cracks are in the plaster and are cosmetic, but some point to a slab that is deflecting, corroding or leaking.
RennovEN looks at the crack’s pattern, width, location and any dampness to tell you which kind you have. Then we repair it with a method matched to the cause.
Signs you need this
- Fine cracks in a web pattern on the ceiling
- A long straight crack across the room
- Crack with rust stains or dampness
- Ceiling crack that keeps getting wider
The RennovEN promise
- 10-year warranty on all works
- Itemised pricing, approved before work begins
- One accountable team across every trade
- Residential specialists — homes only
Diagnosis
Why it happens
Plaster shrinkage
Thin, random cracks often come from plaster drying too fast. Usually cosmetic.
Thermal movement
Top-floor slabs expand in the sun and crack plaster along beams or the room perimeter.
Corroding steel
Rust stains along a crack mean reinforcement is rusting and needs structural repair.
Our method
How RennovEN does it
- 1
Diagnose
Assess pattern, width, moisture and slab condition.
- 2
Treat the cause
Waterproof the roof or repair slab steel if needed.
- 3
Repair the crack
Open, fill with a flexible filler, reinforce with mesh if needed.
- 4
Finish
Putty, prime and repaint the ceiling.
What’s included
- Crack diagnosis and recommendation
- Crack opening and flexible filling
- Fibre mesh reinforcement where needed
- Slab repair if steel corrosion is found
- Ceiling repainting
What affects the cost
- Type and length of cracks
- Whether slab repair is needed
- Ceiling height and access
- Repaint area
Every home is different, so we don’t publish rate cards. After a free inspection you get an itemised estimate, and you approve every line before work begins.
Get my itemised estimate10-year warranty
Crack repairs we carry out are covered for 10 years against reopening of the treated cracks due to our workmanship.
How our warranty worksFAQ
Ceiling Crack Repair: your questions
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