What causes Drywall seams cracking?

So, you have just moved into your new house or maybe again occupied the rooms that have been recently renovated. During the first six months after renovation your fresh painted drywall looked beautiful. But eventually cracks start appearing on its  seams and you start noticing screw popping out through the paint.

In such cases, most of the people first start blaming the drywall contractor for the seams cracking. And, we won’t let him off the hook as it may actually appear to be his mistake.

Other reasons for cracking in drywall seams and nails popping:

You can equate the drywall tape to a ‘band-aid’ for the fault line. You can locate the seam where two sheets of drywall meet. It is usually the weak spot in the wall.

The drywall tapers usually cover the joint with the mud and tape in order to give adequate support. And then add several layers of mud to make the seam smooth as compared with the remaining area on the wall.

When the walls of a house moved, drywall seams may develop cracks. If the joint is not strong. It can be caused because the drywall may have used the wrong type of drywall mud to cover the seams. There are different types of drywall mud. Some are used at the end of the project to provide a smooth finish.

Whereas, some drywall muds have good adhering and are manufactured to be used in the drywall taping process. There are also drywall muds which are intended to be used only for second or third coats.

Some drywall tapers don’t recommend the use of mesh tape as it is not stronger as compared to the paper tape. However, some drywall tapers suggest that it is good to use mesh tape with a drywall mud that sets quickly.

Drywall Corner Bead

Sometimes even the drywall corner bead will also crack. One reason for it can be that your drywaller may have not installed it to increase strength. There are various types of corner beads and there are different methods for its installation.

If the contractor may have used screws or nails there may be a few cracks. However, if he used vinyl beads with spray adhesive, he might have not used adequate glue. In general, different drywall hangers and tapers may give you different opinions on what is the best process which offer ultimate strength. However, the tape on corner bead method is suggested to be the strongest method as well as less prone to cracking according to many drywall tapers. 

Common issues

Another problem that house owners commonly see with the drywall is screw popping which is also very common. During the first year after the drywall job has been finished, you may be clearly able to notice the head of a screw popping out of the paint. Usually, drywall screws are used to secure and strengthen the drywall to the studs below it.

The screw’s top puts great pressure against the paper on the drywall surface. If the head of the nail goes very deep and breaks into the gypsum layer given below the paper, it will lose its strength to secure the drywall. For this reason, the drywall contractor may use a construction adhesive on the studs below it, when hanging the drywall. After that, they may use the screws to secure the sheet until the glue dries properly. Although this doesn’t fix the drywall seams cracking problem but it decreases the number of nail pops.

We all know that drywall tape offers limited strength. The construction adhesive tape help to secure the sheets in place. But drywall tape, corner bead and fasteners provide restricted strength. When a house move, not even a huge amount of tape or glue will be able to prevent the cracks in the seams. And, the cracks generally spread along the high stress areas like the areas above windows, doorways and above beams that cover long areas. However, the best way to fix those cracks and screw popping is to use good drywall techniques from the beginning of the project.

In conclusion

A drywall finisher cannot do anything to prevent cracks in high stress areas after the project is finished. It may show that it has happened due to the drywall taper or hangers fault. However, an experienced and reputable Drywall company will be willing to fix even a screw popping or small cracking within one year after the project is finished.

Contact our GIB stopping experts in North Shore, West Auckland, South Auckland and East Auckland.

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