Skybo is correct. Those hair line cracks can turn into bigger problems if left go. Our former neighbors in our old neighborhood did not take care of their cracks and their neighbors sprinklers were hitting their house. Low and behold, moisture over a period of time, got into their home and created a lot of mold. The homes had to have all its drywall taken out on the one side. What a mess. Easy to fix and even check after your 1 year warranty. They develope over time. They will also open and close with weather change (hot and cold) so every once in awhile, take a walk around your home and look at the walls.
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