Fine cracking commonly develops as plaster, jointing compounds and other wet-applied finishes dry. Slight changes in temperature and humidity, together with normal movement between different materials, can make cracks more noticeable.
What does shrinkage cracking look like?
It is often fine, irregular and limited to the finish. Cracks can also follow plasterboard joints or junctions between ceilings and walls. In many cases they are cosmetic rather than evidence of structural failure.
When should it be checked?
Further investigation is sensible where cracks are widening, repeatedly reopening, accompanied by distortion, extend through the underlying construction or are associated with other movement indicators. Water staining or softness may point to leakage rather than shrinkage.
How is it repaired?
Stable cosmetic cracks can usually be opened slightly, filled with a suitable flexible filler and redecorated. Persistent cracking may require reinforcement of the joint or local renewal of the finish after the underlying cause has been addressed.