Wall crack filling and repair
Every crack in a wall is telling you something, and the first job is to read it, not to fill it. A hairline shrinkage crack in plaster and a diagonal crack over a lintel are the same width and completely different problems. Filling both with the same putty is exactly why cracks come back.
- 5.0 ★
- 195+ ratings
- Vijayawada
- our base — same-day visits in the city
- All days
- site visits, including Sundays
- AP & Telangana
- we travel for larger jobs
You probably need this if…
- Cracks that reopen within a few months of being filled
- A diagonal crack running out from the corner of a door or a window
- A straight vertical line where a wall meets a column or a beam
- Damp following the line of a crack after every rain
What causes it
The same wet patch can come from different places, and each one needs a different fix. This is what we look for on site.
- 01
The line where brick meets concrete
Masonry and RCC expand and shrink at different rates. The crack forms exactly along the junction, and it will keep forming there unless the junction is treated as a junction.
- 02
Movement in the building
Settlement, ground movement and daily heating and cooling all move a structure slightly. A crack that is still moving needs a filler that can move with it.
- 03
Plaster shrinkage
Plaster that was too rich in cement, or dried too fast in the sun, cracks in a fine map pattern. It is only skin deep, but it lets water into the wall behind.
- 04
Steel rusting behind the crack
Where reinforcement has too little cover it rusts, and rust takes up more room than steel. The crack is the concrete being pushed off from inside.
- 05
Stress at the corners of openings
Doors and windows interrupt the wall, so load concentrates at their corners. That is why so many cracks start at a lintel or a sill and run away diagonally.
Our wall cracks process
Step by step, in this order. Nothing is skipped to finish a day early.
- 01
Read the crack
Width, direction, whether it goes right through, and whether it is still moving. Where it matters we mark it and come back, rather than deciding on the first look.
- 02
Cut it open
The crack is cut into a V-groove down to sound material and blown clean, because filler pressed onto dust is filler that falls out.
- 03
Match the filler to the crack
A settled crack is packed with polymer-modified mortar. A crack that is still moving gets a flexible PU sealant, so the next movement stretches the filler instead of splitting it.
- 04
Mesh the junctions
Where the crack sits on the line between masonry and concrete, a fibreglass mesh strip is bedded across it before plastering, so the next movement is spread instead of concentrated.
- 05
Treat any exposed steel
Where reinforcement is showing, the cover is chipped back to sound concrete, the rust is cleaned off, the bar is coated and the cover is rebuilt with repair mortar.
- 06
Plaster, prime and finish
The repair is brought flush with the wall, primed and left ready for paint, inside or out.
What is included
- A survey of every crack on the affected elevation, not only the one reported
- Cutting, cleaning and filling with the material each crack actually needs
- Fibreglass mesh at masonry-to-concrete junctions
- Rust treatment and cover rebuilding wherever steel is exposed
- Plastering and priming, left ready for paint
Free site visit. You get the measured area and a written scope before any work starts.
+91 73823 58857Frequently asked
Request a site visit
Tell us what you are seeing and where. We will come and check, measure the area and give you a clear scope — the same day wherever we can.
- We work in
- Vijayawada
- Guntur
- Amaravati
- Mangalagiri
- Tenali
- Eluru
- Gannavaram
- Machilipatnam
- Bhimavaram
- Rajahmundry
- Kakinada
- Visakhapatnam
Based in Vijayawada, so we are quickest in and around the city — and we take up work across Andhra Pradesh and Telangana.
Tell us where it leaks.
We will come and check before the next rain, measure the area and give you a clear scope in writing.