The best thing to do if you find ceiling cracks is to schedule a free inspection with a reliable contractor. The contractor will check the crack to determine its severity and what steps may need to be taken. Many times a crack is nothing to worry about. Our contractors offer free inspections. Contact My Foundation Repairs and talk with a contractor to learn more about your ceiling cracks.
These cracks can be caused when a drywall joint wasn't properly taped or mudded. The tape may not be sticking to the drywall and so a "crack" appears where the edge of the tape is. You can either ignore this or apply a small bit of drywall compound to the loose tape and stick it back on.
If the crack is yellow or brown, it is most likely being caused by a water leak. Once the leak is repaired, you can re-tape the drywall, making it look like new again. If the drywall is swollen or soft, you will want to replace the section.
A thinned drywall compound is used to make a textured ceiling. However, if the compound was applied too thickly, it can crack in all directions. You can cover the cracks with a layer of thin drywall compound. You can also sand off the old compound and reapply it.
This may be caused by something called "truss uplift". The trusses holding up your roof are designed to move a little bit to absorb changes caused by temperature and humidity. The truss may move upward, lifting the ceiling with it. It's not going to cause any structural problems, but if you want to repair it, you will probably want to hire a professional.
If you live in a home with plaster ceilings and you begin to see cracks, they may be caused by moisture and/or movement. Small cracks can be repaired by applying plaster. If they are bigger and sections of plaster are falling, you will probably have to remove the plaster and install with a drywall section.
If your ceiling is sagging, you need to have the problem addressed. If something heavy is above the ceiling, the ceiling can sag. You will need to move the heavy object. Other causes may be the removal of a load-bearing wall or damage to the support structure. This type of issue will require an inspection by a structural engineer or contractor. This is a situation that needs to be repaired quickly, before it gets worse.