If the drywall joint compound is put on in one or more coats that are too thick then when the mud dries, it shrinks, creating hairline spider or crazing type cracks. Drywall tape is used as well as drywall joint compound, often called drywall “mud”. Spiderweb or hairline type cracks due to drywall mud issuesĪt drywall joints where two pieces of drywall butt up to one another, drywall installers tape the joint areas. These lower coats tend to crack first and then the cracks work their way up to the topcoat, thus patterns of thin cracks develop in the topcoat of the paint. The layer(s) under the topcoat get brittle over time and expand and contract due to thermal and moisture changes differently than the more flexible topcoat. When repeated coats of paint are applied over other coats, then over a period of years, the chances of crazing (a pattern or network of hairline/ fine cracks) or alligatoring (a pattern similar to the reptiles scaly skin) cracking increases. Hairline type of spiderweb cracks due to paint issues Major track builders know that they will get a number of calls about these cracks in the first year or two and just consider it part of the construction business.
Also, the wood framing lumber usually drys out some which causes the studs, joists, and rafters to twist or bow slightly.
One of the common reasons for this is that many homes will settle a little in the first year or two. New homes will often develop a few cracks in the first year or two, but most of them will be at door and window corners or at the areas where the walls meet the ceilings, rather than on the ceiling itself.
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