I have a problem in my house where the drywall separates from the ceiling and opens up a gap of 1/4″ in the winter. In early spring the gap closes completely and stays that way until late fall. The drywall tape comes loose from the wall and the gap is most significant on the walls towards the interior of the home. There is negligible or no separation of the tape along the walls around the perimeter. Also, the problem is severe on the second floor while it is non-existent on the 1st floor. At first I thought it had something to do with settling as I had noticed considerable settling of the soil outside.
A specialist firm inspected my home and told me that the foundation slab in the basement was in perfect condition and settlement was not a factor. I have had many contractors come to look at the problem and received two standard responses. One is that the workmanship of the original builder was poor and poor quality tape was used. The other answer I get is that this is related to humidity. During the winter the air inside the house is dry and it causes the wood in the joists to buckle. But most of them are perplexed that this happens only upstairs and not downstairs. They also seem surprised that the gap is as wide as 1/4″. Do you know what is going on? More importantly, do you know how I can fix it?
You can solve the problem by taking the following steps:
- Make sure that your attic is well ventilated. Add eave vents, gable venting, a ridge vent or turbine ventilator.
- Be certain that household exhaust fans (range top, bathroom and laundry) DO NOT discharge into the attic.
- Check to make sure that the attic is well-insulated — R-38 minimum and more if you live in a cold climate.
- Control air infiltration by installing gaskets at electrical outlets and switches.
Keep in mind that you will only “minimize” expansion by taking these steps. Some cracking at the wall to ceiling connection may continue to occur. You can further prevent cracking by making sure the ceiling joist are securely anchored to the top of the wall framing with nails, screws or L-brackets.