Most ceiling cracks are cosmetic. Some are not. Here is how to read the difference and what the common causes are in Bloemfontein homes.
Hairline cracks along plasterboard joins
The most common crack in Bloemfontein ceilings runs along the seam between two plasterboard sheets. This is almost always cosmetic - the paper tape over the join has lifted or the join compound has dried out. Bloemfontein's temperature swings accelerate this. Sand, re-tape and skim for a permanent fix.
Cracks that follow the joists or trusses
If a crack follows a straight line above where a roof truss or ceiling joist sits, the ceiling board has been deflected by weight or movement in the roof structure. This needs a roofer to check the truss condition before the ceiling is repaired. Fixing only the ceiling without finding the structural cause is a temporary measure.
Cracks accompanied by staining or sagging
A crack with a brown ring or damp stain around it means water has been getting in. The source needs to be found and fixed first. Once the roof or plumbing above is repaired and the ceiling is dry, the damaged board can be replaced. Never repair a wet ceiling - it will fail again.
Wide or stepped cracks at the wall-ceiling junction
A gap opening between the ceiling and the wall, or a crack that steps diagonally across the ceiling, is a sign of foundation movement. These should be assessed by a structural professional before any cosmetic repair is done. Foundation movement in Bloemfontein's expansive clay soils is not uncommon in older properties.
Frequently Asked Questions
Are small ceiling cracks dangerous?
Hairline cracks along plasterboard joins are almost always cosmetic. Wide, stepped or growing cracks at corners and along walls warrant professional assessment.
Can you repair a cracked ceiling without replacing the whole board?
Yes. Hairline and tape-joint cracks can be filled, re-taped and skimmed. Boards with structural damage, water staining or large holes are replaced panel by panel.
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