You’ve heard the old adage … measure twice – cut once. In the world of replacement windows this couldn’t ring more true. The correct window type, fit, and proper, professional installation can make or break a replacement window project. If you’re replacing wood or metal windows, this can require additional expertise and work. If you choose a professional, check the reputation of the company. Though there are many reputable window installation companies to choose from, you should be aware that there are disreputable ones as well. Look for a professional that backs their installation work with a warranty on labor and parts in addition to a product warranty.