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EXPANSION & CONTRACTION All building materials are subject to expansion and contraction caused by changes in temperature and humidity. Dissimilar materials expand or contract at different rates. This results in separation between materials, particularly dissimilar ones. The effect can be seen in small cracks in drywall and in paint, especially where moldings meet drywall, at mitered corners, where tile grout meets tub or sink, etc. This can be alarming to an uninformed homeowner, but, in fact, it is very normal. Shrinkage of the wood members of your home is inevitable. This will occur in your home. It will be most noticeable during the first year, but may continue beyond that time. In most cases, paint and caulking are all that is needed to conceal this minor evidence of a very natural phenomenon. Properly installed caulking will shrink and must be maintained by the homeowner.
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