The answer to 'shingle replacement damage' is that there are several common causes, including severe weather, age and wear, and improper installation. Symptoms can include missing, cracked, or curling shingles, leaks, and water damage to the home's interior. The best solution is often to have a professional roofing contractor assess the damage and provide a recommendation for repair or full shingle replacement.
Homeowners should be cautious about attempting DIY shingle replacement, as it can be dangerous and difficult to do properly. Improper installation can lead to further damage and leaks. Unless the damage is minor and the homeowner has experience with roofing work, it's generally best to hire a licensed and insured roofing professional to ensure the job is done safely and effectively.