A qualified roofer will need to look at your roof in person to tell you the best method of repair. Unfortunately, this must be a hands-on expert opinion.
The added weight of solar panels
As far as solar panels are concerned, if your roof is properly engineered for concrete tiles, solar panels should pose no weight problem.
I usually estimate them at 3-5 lbs, but you will need to find out the specifics of the panels you choose to buy.
Get estimates and check references
As with any contractors, have the roofer and the solar contractor out to the site, have a complete estimate done and check their references.
- In the case of roofers, I always recommend getting references from architects or general contractors, as well as homeowners.
- Sometimes you get a more objective and knowledgeable opinion that way.
- Same with a solar contractor, but there you might want to get a reference from a mechanical engineer, too.
For more information:
Read "I want to convert my home to solar energy. Should I install panels on the roof or build a trellis?", a Q&A with Cynthia Phakos.