Outside Wall Cracks & Expansion Joints in Hyderabad
Not all cracks are the same, and treating them the wrong way is why so many crack repairs fail within a year. A hairline surface crack, a structural settlement crack, and a failed expansion joint all need different sealants and techniques — we start by diagnosing the crack type before choosing how to seal it, rather than applying a one-size-fits-all patch.
Sikaflex, Fosroc Thioflex, epoxy crack fillers, elastomeric wall coatings
Common Causes We See in Hyderabad
- Thermal expansion and contraction opening up hairline cracks over time
- Building settlement causing structural cracks, usually diagonal and widening at one end
- Expansion joints where the original sealant has hardened, shrunk, or debonded
- Cracks around window and door frames where different materials meet
- Old, brittle sealant that has lost its ability to flex with the building’s movement
Our Process
- 1 Crack mapping and cause assessment
- 2 Widen and clean cracks for proper sealant adhesion
- 3 Fill with flexible polyurethane or epoxy sealant
- 4 Seal expansion joints with backer rod and joint sealant
- 5 Apply weather-resistant coating over repaired areas
Frequently Asked Questions
How do you tell if a crack is structural or just surface-level?
Structural cracks are typically diagonal, wider at one end, and may recur even after patching — these need engineering assessment. Surface and thermal cracks are usually straight, hairline, and stable in width, and respond well to flexible sealant repair.
Why do expansion joints fail?
The sealant inside an expansion joint is designed to flex with the building’s movement, but over years of sun exposure it hardens, shrinks, and eventually debonds from the joint edges, letting water through.
Is a hard cement filler enough to fix a crack?
No — rigid cement fillers crack again quickly because they can’t move with the building. We use flexible polyurethane or epoxy sealants specifically because they expand and contract along with the structure.
What if the crack keeps reappearing after repair?
A recurring crack in the same spot usually indicates an underlying structural movement issue that needs assessment beyond a standard sealant repair — we’ll flag this during inspection rather than repeatedly patching the same spot.
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