Cracks & Structural Repair
Concrete spalling and rusted steel repair
We remove damaged concrete, treat corroded reinforcement and rebuild with polymer-modified repair mortar so your slabs and columns stay strong.
Pieces of concrete falling from your ceiling or balcony, with rusty steel bars visible behind, is spalling. It is especially common in coastal and humid cities, and it gets worse every year if ignored.
Rust takes up more space than steel. As bars corrode they push the concrete off. RennovEN removes the damaged concrete, treats the steel, and rebuilds the section properly.
Signs you need this
- Concrete chunks falling from ceilings or balconies
- Rusty steel bars visible
- Brown rust stains along cracks
- Hollow sound when tapping concrete
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
Low concrete cover
Bars placed too close to the surface are reached quickly by moisture and air.
Persistent leakage
Water seeping into slabs for years drives corrosion of the steel inside.
Salty air
Chlorides in coastal air accelerate rusting of reinforcement.
Our method
How RennovEN does it
- 1
Remove
Break out loose and damaged concrete to sound material.
- 2
Treat steel
Clean rust, add bars where loss is significant, apply anti-corrosion coat.
- 3
Rebuild
Bonding agent and polymer-modified repair mortar.
- 4
Protect
Waterproof the source and apply a protective coating.
What’s included
- Removal of spalled concrete
- Rust removal and anti-corrosion treatment
- Additional steel where section loss is high
- Polymer-modified repair mortar
- Waterproofing of the leak source
What affects the cost
- Area and depth of damage
- Steel section loss and replacement
- Location: ceiling, balcony, column
- Propping required during repair
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
Concrete sections we repair are covered for 10 years against workmanship defects such as debonding of repair mortar.
How our warranty worksFAQ
Concrete Spalling Repair: your questions
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