Because wood is flexible and plaster is not you will have cracks form in the ceiling following the join lines of the plasterboard sheets.
Roof leaked and niw my ceiling plaster is cracked.
The plaster ceiling in my 1949 home sustained water damage from a roof leak discoloration bulging flaking falling etc.
We put on a new roof and fixed the ceiling scraped mudded painted.
A crack that is an 1 8 inch wide and only two feet long in a corner will not be given as much weight as a ceiling with 1 4 inch wide cracks three or five feet long and that appear in a number of locations.
That was a year and half ago.
How to know when ceiling cracks are structural or just old.
Small cracks can be repaired by applying plaster.
Cracks that develop quickly may be warning you about a leak in an upstairs plumbing fixture or in the roof.
Using a medium bristle brush scrub the area with a solution of water and tri sodium phosphate tsp or a non phosphate detergent.
Another sign of a water damaged ceiling is swelling or bubbling.
I d say the area was about 3 square feet.
All buildings regardless of when or where they were built and with what material are subject to movement.
3 cut short pieces of self adhesive fiberglass mesh joint tape and cover the groove with them.
Roof leaking from heavy rains toilet overflowing from upstairs bathroom pipes leaking and condensation line leaking are a few causes.
The drywall itself may also be spongy and it may sag.
It can be seasonal shrinkage.
House settling and temperature or moisture fluctuations in an attic which result in the expansion or contraction of framing members.
Age of the house.
4 dip a sponge in clean water and dampen the area of the repair.
As a building becomes older the tiny cracks caused by the continual onslaught of different forces on the house combine and magnify and eventually become visible.
Ceiling cracks in plaster ceilings.
The roofing system or the.
Discoloration sagging drywall or buckling plaster and dripping water from your ceiling might make you think that the ceiling itself is leaking in reality water coming from the ceiling is a symptom of some other home system that is actually leaking.
Ceiling cracks become more of a red flag if there are other signs that the house may have movement or structural problems.
2 blow out the plaster dust.
Typically plaster ceiling cracks have two causes.
If they are bigger and sections of plaster are falling you will probably have to remove the plaster and replace it with a drywall section.
When the ceiling looks like it is bulging out it means there is an accumulation of moisture into the wood and drywall.
5 mix setting type joint compound and apply it over the tape and groove.