1. Roof leaks. Roof Leaks can occur due to any of the issues listed below. Roof Leaks can be easily repaired but in general won't last forever and will eventually lead to complete roof replacements, since a properly installed quality roof should not have any leaks at the first place. 2. Missing Roof Shingles. Since shingles are installed piece by piece, it’s possible for individual shingles to unattach and/or come off the roof. 3. Shingle Blistering Repair. This happens when moisture trapped within the shingle expands and pops/breaks through the surface and creates an exposed spot. Most of the time, blistering occurs during the high-temperature summer months. Another reason for blistering is poor ventilation of the roof that creates trapped moisture. Blistering exposes your roof, decking, and property to the elements, which can ultimately lead to leaking and premature failure of the roof system. 4. Shingle Roof Curling. If you can see the edges of the shingle lifting off the roof’s surface or the corners turning upward, you’re seeing curling. 5. Roof Shingle Cracking. Cracking is a natural part of the aging process for shingles. Over time, wind, roof stresses, thermal movement, and deck movement aid in a shingle cracking. So, if  surface cracks split or tear through the shingles, it’s most likely because the shingles are older. 6. Roof Shingle Granule loss. It happens is where the top layer detaches from the shingle and falls off. All shingle roofs will experience some level of granule loss over time due to weathering and exposure. 7. Mold, Mildew & Algae on shingles. These occurrences are especially common in high-humidity areas and on northern-facing roofs that are heavily shaded or rarely get sun. Mildew and algae often looks like black streaks down a roof. Trapped moisture can wreak havoc on the roof underlayment and even rot out a plywood or OSB roof deck.