How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
What is causing the cracks in my wall?
Saturday, December 5, 2020
Think of it this way: a crack is your wall creating its own expansion joint. It happens due to what’s called “differential expansion.” Walls are affected by factors such as temperature changes, moisture intrusion, shifting of the loads on and around them, and movement in the foundation below them. But, if the whole wall is affected in the same way, it moves as a solid, unrestrained unit and does not crack. When the forces acting on it are different in one area from another, or part of the wall is restrained from movement, then something has to give and that means a crack opens up.
The location and shape of the crack can tell you a lot about what’s happening. Here’s some links below to our articles about specific types of cracks and their underlying causes. But we suggest your start with our course in “crackology” at Where are the places to look to find structural cracks in a house?
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