The Right Way to Install Solar Panels During a Re-Roof

If your home already has solar panels and you need a roof replacement, chances are you have questions:

Do the panels come off first? Who handles the wiring? Will your solar warranty stay intact?

The good news is that if you partner with Casas Roofing, we’ll coordinate the entire process for you. Here’s how it works—and why the team you choose matters more than you might think.

Why Choosing the Right Team Is Critical

Re-roofing under solar is a complex process that requires experience and coordination. Your installer has to remove electrical equipment, protect wiring, reinstall mounts, and reseal penetrations, all without voiding your warranty.

If this job is done carelessly, issues tend to show up months or years later:

• Leaks from mounting holes that weren’t sealed correctly
• Wiring damage from pulled or pinched cables
• Misaligned mounts or rails
• Flashing that wasn’t integrated with the new roofing system
• Warranty problems when non-certified techs handled the work

That’s why we work with certified electricians and coordinate the entire project from start to finish. When we manage the re-roof and the solar reinstall together, you get:

• One smooth, unified workflow
• Full warranty protection
• A new roof built specifically for your solar system

Our Process: The Right Way to Handle Solar Re-Roofs

Once your panels are safely removed by our partners at California Electric, our roofing team gets to work. We rebuild your roof with the reinstall already in mind.

Here’s what that looks like:

Panel Removal

Your system is powered down, wiring is safely disconnected, and each component is labeled and stored so everything goes back exactly where it should.

Roof Removal & Deck Inspection

We remove your old roofing, repair damaged decking, and reinforce areas where mounting hardware will be reattached.

New Underlayment & Waterproofing

We install high-quality underlayment and properly seal all future penetration points before any roofing material is installed.

New Roof Installation

Whether your home has shingles, tile, or metal, we install the new roof using techniques that integrate cleanly with solar and prevent leaks.

Solar Reinstalled

Once the roof is complete, the electricians return to reinstall your mounting hardware and reconnect the wiring. We work alongside them to ensure every penetration is flashed and sealed properly.

Final Alignment & System Check

Your panels are set, leveled, tested, and returned to full working order.

How Reinstallation Works on Different Roof Types

Different roofing materials require different solar mounting approaches. Here’s what you need to know:

Metal Roofs

Metal roofs work extremely well with solar, but reinstalling the system requires the right hardware. Homeowners researching installing solar panels on a metal roof will see the same best practices we use:

• Standing-seam clamps or specialized brackets
• Avoiding unnecessary penetrations
• Clean, protected cable paths

Why it matters:

With metal, the goal is to avoid unnecessary holes. The electricians and roofing team work together to secure your system to the seams or ribs of the roof, keep cable paths clean, and protect the finish so your metal roof remains watertight.

Tile Roofs

Tile roofs are beautiful, but they’re also fragile. That’s why solar panel tile roof installation (or reinstallation) requires extra care. Tiles must be removed, stored safely, and sometimes replaced. The mounts anchor to the roof deck underneath, and the tile layer is rebuilt around them.

Why it matters:

Tile can crack easily if handled incorrectly. By using tile-compatible mounts and proper flashing, we make sure your system is securely anchored without damaging your tile or compromising your waterproofing layer.

Shingle Roofs

Shingle roofs are the simplest surface for solar, which is why guides on how to install solar panels on shingle roof systems often highlight straightforward mounting techniques. The same principles apply during a reinstall: mounts tie into rafters, flashing is slid under shingles, and every penetration is sealed.

Why it matters:

Shingles allow for a very clean, watertight reinstall. When roofing and electrical crews coordinate, the result is a solar system that sits securely, drains properly, and protects your home long term.

Do It Once. Do It Right.

If your home already has solar and your roof needs to be replaced, Casas Roofing makes the process simple and effective over the long haul. Whether you have questions about the process or are ready to schedule a free inspection, we’re here to help. Contact us today.