The homeowner gave us a call for some much-needed roof repair as they noticed some shingles were sliding down their roof. It's a common problem that occurs when shingles are not installed properly, either due to inadequate nailing or nailing outside of the designated zone. The use of high-pressure nail guns in warm weather could also contribute to this issue. This problem is more prevalent in steep roofs and often appears within the first 5 years of installation.