Roof maintenance can be a tough thing. It takes quite a lot of time and effort for the homeowner. This doesn't mean it should ever be neglected however. Be sure to maintain your roof, since it is your home's main defense. Read these tips to keep your roof in good shape for years. Don't hesitate to replace shingles. You might think it's okay to wait on fixing something, however, the damage will worsen over time. You should fix or replace…