This article describes the common causes of all types of cracks that appear in drywall or gypsum board or plasterboard walls ceilings in building interiors.
Cracks in ceiling drywall.
Ceiling cracks accompanied by wall cracks could be the result of the house settling.
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Homes naturally settle as they age which can create crevices in the walls and ceilings typically above doors.
The common approach is to fill the crack with spackling then paint over it but this is at best a temporary fix since the crack will usually come back as the seasons change.
A crack is continuous though the wall and ceiling.
Illustrations show where cracks are most likely to appear explain why and suggest both repair approaches to drywall cracks and how to prevent cracking in plasterboard or gypsum board.
This type of crack suggest that there may be a structural issue i e.
Ceiling cracks that run across the ceiling to the wall and then downward on the wall.
Next put mesh drywall tape over the crack and press it firmly onto the ceiling.
A foundation issue or framing issue.
This is a sign of structural damage usually related to a weak wall.
Cracks that cause concern are those which run across the length of a ceiling and then continue down a wall along the same line.
Prevent their recurrence by using fiberglass mesh drywall tape and setting type joint compound to make rock hard joints.
Basically a continuous crack going through the ceiling and the wall.
To fix a ceiling crack start by scraping away any loose material from the crack with a drywall knife.