This occurs because there is a joint, which gets drywall taped and then layered with two or three coats of drywall mud. These joint areas are weaker than in the center, or field area of the drywall, therefore some cracks may occur at these joints.
As previously mentioned, stress is usually the main reasons that cracks occur. However, there are many potential causes of stress; some of the more common ones are:. Expansion and contraction due to hot and cold weather this can be common in vacation homes and homes that have been left vacant due to the fact that the internal temperature of the home has been allowed to get higher and lower depending on the outside temps.
Earthquakes — if the home is in an area that has trimmers or earthquakes. Truss uplift — can create cracks where interior walls meets ceiling read more. Poor quality workmanship in taping the drywall joints. Too much mud, too little mud, missing drywall tape, and drywall secured with internal stresses are some causes.
It is important to note that while these cracks should be looked at more closely, these types of cracks may not be serious. Whether or not these cracks are serious is dependent on the particular circumstances. The above items can be an indication that a structural issues may exist, depending on the location and severity. If so, some of these issues may need to be addressed to help keep the drywall cracks from coming back.
For the majority of cracks a painter would be the appropriate person to seal and cover the cracks. At times, a drywall contractor or a skilled handyman who can tape and mud joints may be needed. There are many products that can be used such as mesh tape, mesh patch kits, drywall mud and caulking. Thought I would post a follow-up. And when I said "first coat", I meant the coat after the tape was up. Is that considered to be the second coat?
The source of my problem was the mud. I was using some left-over junk from my father-in-law that just wasn't cutting it. The mud even smelled a little odd. After buying new mud, mixing it properly, and putting on another coat, it looks fine. I just hope those cracks underneath don't come back to haunt me.
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Reply to Ed Pawlowski. Stormin' Norman Contact options for registered users. Cracks in freshly applied drywall mud can be simple to address once you understand the cause. Drywall mud is used where different pieces of drywall meet, creating a seam or corner. Drywall explains that this creates an area of high stress in the building's construction, which can flex and shift with changing temperature, humidity and the building settling.
To strengthen these areas and hide the seams, tape is applied along the length of the seam and is then sealed over with drywall mud. The drywall mud is applied in increasingly thin layers starting with a thicker layer and then applying thinner coats that are feathered out to provide a smooth finish when the wall is painted.
The drywall mud has to dry completely between coats, which happens via different processes depending on the type of compound used. The most common type of joint compound is ready-mixed and contains water. This type of joint compound dries through evaporation. As the water evaporates from the compound, the solid particles left behind take up less space, causing the compound over the area as a whole to shrink.
Even when the joint compound is applied properly, this can cause small, shallow cracks to develop over the surface. Powdered joint compound, on the other hand, dries through curing in a chemical process similar to concrete.
While this makes cracking less likely, improperly applied drywall mud of either type can still crack. The most common cause of cracking in freshly applied drywall mud is when it is applied too thickly. This exacerbates the issue with evaporation-based drying and can even crack curing compounds. Past this point, applying more drywall mud will cause the cracking to worsen if done improperly. This also weakens the building structurally.
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