Maintenance
Concrete Crack Repair in Singapore: What to Know
A crack in a wall, ceiling or floor can be alarming — but most are cosmetic, and only some signal a structural concern. Knowing the difference tells you whether to simply fill it or call in a professional. Here’s a practical guide.
Key takeaways
- Fine hairline cracks are usually cosmetic — from shrinkage or settlement.
- Wide, growing, diagonal or stepped cracks may be structural — get them assessed.
- Cracks that leak water need sealing plus a waterproofing fix.
- Proper repair addresses the cause, not just the surface.
Cosmetic vs structural
Most cracks are cosmetic — fine hairlines from plaster shrinkage, minor settlement, or thermal movement. Be more cautious with cracks that are wide, lengthening over time, diagonal, or stepped along brick/block lines, or that come with doors sticking or uneven floors — these can indicate structural movement and warrant a professional assessment.
When water is involved
A crack that lets water through — on an external wall, balcony or wet area — needs more than filler. The waterproofing has to be restored so water stops tracking through, or the crack (and any seepage) simply returns.
How cracks are repaired
Cosmetic cracks are cleaned out, filled and made good before repainting. Structural or active cracks need the cause addressed first — which may involve engineering input — before any cosmetic repair, so it doesn’t just reappear.
Frequently asked questions
Are hairline cracks a problem? Usually not — they’re typically cosmetic and easily made good.
When should I worry about a crack? If it’s wide, growing, diagonal or stepped, or paired with sticking doors or uneven floors — get it assessed.
Why does my crack keep coming back? The underlying cause — movement or water — hasn’t been addressed, only the surface.
Do cracks let water in? They can, especially externally — sealing plus waterproofing is needed then.
Concerned about a crack?
We assess and repair cracks properly, addressing the cause. See our handyman service, or for wet-area cracks our waterproofing service. Get a free assessment.
