Should You Replace Your Roof Before Going Solar?

What St. Louis Homeowners Need to Know Before Installing Solar Panels

If you are considering solar for your home, one of the most important questions to answer first is whether your roof is actually ready for it.

Many homeowners in St. Louis get excited about lowering utility bills, protecting against rising energy costs, and increasing property value with solar energy. But before installation begins, the condition of the roof becomes a critical factor that can significantly impact long-term cost and performance.

The short answer is simple:

If your roof is nearing the end of its lifespan, replacing it before going solar is usually the smarter long-term decision.

Why Your Roof Matters Before Installing Solar Panels

Solar panels are designed to last 25–30 years. Ideally, the roof underneath them should have at least the same remaining lifespan.

If a roof is already 15–20 years old, installing solar panels on top of it can create a major issue later. When the roof eventually needs replacement, the solar system must be removed and reinstalled afterward. This process, known as a detach and reset, can add significant additional labor and equipment costs.

This is why roof condition is one of the first things professionals evaluate before any solar project begins.

At SunSent Solar & Roofing, roofing and solar assessments are often combined to help homeowners avoid unnecessary future expenses and project delays.

Signs You Should Replace Your Roof Before Going Solar

1. Your Roof Is Over 15–20 Years Old

Most asphalt shingle roofs in Missouri last around 20–30 years depending on storm exposure, installation quality, and maintenance.

If your roof is approaching that age range, it may not be ideal for a long-term solar installation.

2. Missing, Curling, or Cracked Shingles

Visible roof damage is a clear warning sign. Common issues include:

• Curling or brittle shingles
• Granule loss
• Soft or sagging spots
• Active leaks or water stains

These problems can worsen over time and compromise a solar installation.

3. Recent Hail or Storm Damage

St. Louis homeowners frequently experience hailstorms and high winds that can weaken roofing materials even if the damage is not immediately visible.

Even minor hail impacts can reduce roof lifespan and increase the risk of future leaks once solar panels are installed.

Why Roofing and Solar Projects Are Often Combined

Many homeowners are now choosing to complete roofing and solar installation together as a single coordinated project.

This approach can help reduce:

• Future detach-and-reset costs
• Scheduling conflicts
• Permit delays
• Warranty complications
• Duplicate labor expenses

By aligning both projects, homeowners can ensure the roof and solar system are designed to work together for decades.

SunSent Solar & Roofing specializes in coordinating roofing upgrades with solar installations for maximum efficiency and long-term value.

What Roofing Materials Work Best for Solar Panels?

Not all roofing systems perform the same when paired with solar energy systems.

Asphalt Shingles

• Most common in St. Louis
• Highly compatible with solar mounting systems
• Cost-effective and widely supported

Metal Roofing

• Excellent durability
• Long lifespan (often outlasting solar systems)
• Strong compatibility with solar mounting solutions

Because both roofing and solar longevity matter, many homeowners choose to upgrade to metal roofing before installing solar for a fully long-term solution.

Financial Considerations: Replace the Roof Now or Later?

One of the biggest financial risks is installing solar on a roof that will soon need replacement.

If the roof fails after solar installation, homeowners may face additional costs such as:

• Solar panel removal
• Temporary system storage
• Roof replacement labor
• Solar reinstallation
• Additional inspections and permits

These combined costs can often exceed what it would have cost to replace the roof beforehand.

Working with a provider like SunSent Solar & Roofing helps homeowners plan both systems together to avoid unnecessary duplicate expenses.

Common Mistakes Homeowners Make Before Going Solar

Many costly issues can be avoided with proper planning.

Some of the most common mistakes include:

• Skipping a full roof inspection before solar installation
• Focusing only on upfront solar pricing
• Ignoring previous storm or hail damage
• Waiting too long to replace an aging roof
• Not coordinating roofing and solar together

A roof evaluation before solar installation helps prevent these issues early.

Why St. Louis Homeowners Are Combining Roofing and Solar

Across St. Louis, including areas like Chesterfield, St. Charles, Ballwin, Wildwood, and O’Fallon, more homeowners are choosing to upgrade roofing and solar systems together.

This trend is driven by:

• Increasing storm activity
• Rising utility costs
• Improved solar technology
• Long-term home improvement planning

Combining both services ensures the roof is fully prepared to support solar panels for their entire lifespan.

Frequently Asked Questions

Should I replace my roof before installing solar panels?

If your roof is older, damaged, or nearing the end of its lifespan, replacing it before solar installation is typically the best long-term decision.

Can solar panels damage my roof?

Properly installed solar systems should not damage a healthy roof. However, improper installation or an aging roof can increase the risk of leaks and structural issues.

Final Thoughts

For many homeowners in St. Louis, replacing the roof before installing solar panels is not just a precaution—it is a long-term investment strategy that helps prevent future costs, system removal, and unnecessary complications.

Ready to Find Out If Your Roof Is Solar-Ready?

Schedule your roof and solar evaluation with SunSent Solar & Roofing today.

Call 636 757 3083 to speak with a specialist and determine whether your roof is ready for solar or needs replacement before installation.