Installing a shelf might seem like a simple, do-it-yourself project, but done incorrectly, you could end up with a front-heavy shelf that tilts when you stack it with belongings. Or you might have a shelf that pulls away or out of the drywall. When this happens, the nail holes enlarge, and your drywall can chip, leading to the potential for extensive repair work and a safety hazard. Done correctly, your shelf will hold the load you built it for, and it will not damage your drywall. You can install your shelf safely, securely and permanently using a few simple carpentry tools.