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When a framing member in your home becomes weakened because of damage it compromises the structure. Replacing the damaged piece is not always necessary or practical so the Pros use a common fix called a “sister” for easy residential repairs. A “sister” is an identically sized piece of lumber that adds a second support along side an existing structural member that is damaged or weakened. The damaged member is leveraged or jacked back into place with a temporary support to keep it there. Then a new stud, joist or rafter is cut to size with as much length as possible and “sistered” into place alongside the original piece. Then the two are fastened together with the appropriate nails, screws or bolts. As the old saying goes, sometimes two is better than one.