Homeowners often give little thought to the roof over their heads until there are signs of water damage such as mold, ceiling stains or, in the worst case, structural rot. Too often people think that a newer roof is fine up until the end of its expected lifespan. In fact, a common cause of water penetration is poor workmanship during installation. Once the roofing materials contract in cold winter temperatures and expand in the summer heat, installation problems can begin to manifest as leaks.There are two main typ... read more