When it comes to the energy landscape, 2025 has been full of changes. Many building owners are interested in solar energy to reduce environmental impact and generate additional income. However, one important factor often overlooked is the condition of the building’s roof. Because solar panels are typically installed for long periods, usually 20 to 25 years, the roof must be able to support the system safely and effectively throughout that time.
Why Roof Condition Matters for Solar Panels
Solar panels are mounted directly on the roof, so the roof’s structural integrity and lifespan are critical considerations. Here’s why:
- Longevity: Solar panels have a long service life (20 years is a long time!). If the roof is near the end of its life, it may need replacement before panels are installed to avoid costly removal and reinstallation later.
- Structural Support: The roof must be strong enough to bear the weight of the panels and mounting equipment without risk of damage or leaks.
- Maintenance and Repairs: Installing solar on a roof that will require repairs soon can complicate maintenance and increase costs, which is precisely what building owners want to avoid.
What Roofs Are Best Suited for Solar?
Roofs that are new or in excellent condition are the ideal candidates for solar panel installation. Generally, if a roof is 10 to 12 years old or older, a professional inspection is recommended to assess its condition and expected remaining lifespan. If the roof shows signs of deterioration, such as cracks, leaks, or missing shingles, it is advisable to plan for replacement before proceeding with solar.
Considering Roof Replacement Alongside Solar Installation
Replacing a roof is a significant investment. Combining this project with solar panel installation can be a practical approach for building owners already planning a roof replacement. Doing so ensures the roof will last as long as the solar lease or system lifespan, preventing the need for costly panel removal later.
Additionally, leasing rooftop space for solar panels can generate income that helps offset the cost of a roof replacement—easing the financial burden and making the investment more manageable.
What to Expect During the Solar Evaluation Process
A typical process for evaluating solar installation readiness includes:
- Roof Assessment: A detailed inspection to determine the roof’s age, condition, and structural capacity. If a roof replacement is necessary (especially if it’s older than 10 years), you will need to complete any necessary roof work before solar installation.
- Solar Potential Analysis: Evaluating available rooftop space and sunlight exposure to estimate energy production and potential earnings.
- Financial Estimate: Providing an annual estimate of income from solar, which can help inform decisions about roof replacement.
- Solar Installation and Lease Agreement: Finalize contracts and install the solar energy system once the roof is confirmed suitable.
We covered common questions you should ask a commercial rooftop solar provider before signing up for a lease here on the blog.
Solar Leasing with Catalyst Power
We at Catalyst Power® install, own, and maintain solar panels—at no upfront cost—on commercial rooftops. We typically require that the roofs be new or in excellent condition before signing a lease agreement, since our rooftop leases last 20 to 25 years. Catalyst Power does not pay for roof replacement, but we can provide estimates of potential earnings from leasing rooftop space, which may help building owners justify the cost of a new roof.
Our process includes inspecting the roof’s condition and proceeding with a signed lease once the roof is ready—including all replacements and repairs. This approach helps ensure a long-term, trouble-free solar installation for both parties.
If you’re considering solar for your building and want to understand how your roof’s condition affects your options, consulting with one of our Energy Experts can provide clarity on next steps and potential financial benefits.
