Solar Panels for Flat Roofs: 3 Things You Need to Know

So, you’ve decided you want to install solar panels, but your home or business has a flat roof.

Can you still install solar panels?

The answer is yes!

Installing solar panels on a flat roof is a great way to get as much value as possible from your available surface area and make smart energy decisions. In fact, Consumer Reports states that flat roofs are some of the best for solar panels to power your home.

That said, there are some special considerations you’ll have to take as you install your panels.

Here’s what you need to know.

Key Takeaways

• Solar panels can be installed on flat roofs.

• Flat roof solar panels follow the rafters. Although there is no flexibility on orientation, there is a small amount of flexibility on angle – we recommend 10-15 degrees for best results.

• Flat roof installations cost more since they involve the addition of solar “racking systems” and sealing the roof penetrations with a certified, professional roofer.

• Choosing a local solar installer like Sandbar Solar & Electric, experienced in working with flat roofs, is crucial to designing and installing an efficient system.

Yes - You Can Install Solar on Your Flat Roof

Flat roof solar arrays are a type of solar power setup designed specifically for installation on flat or low-slope rooftops.

They consist of multiple solar panels positioned to maximize sun exposure and energy capture.

FOR COMMERCIAL ROOF-TOPS - The installation process incorporates various methods to avoid roof penetration, such as using weights or ballasts, ensuring the roof's integrity while harnessing clean, renewable energy.

While some people think solar panels aren’t compatible with flat roofs, the opposite is true.

These arrays are particularly beneficial for commercial or industrial buildings with expansive flat roofs, where they provide a sustainable power source that can significantly reduce energy costs.

Because of these outstanding benefits, more people are installing PV systems on their flat roofs and reaping the benefits year after year.

What to Know About Solar Panels on Flat Roofs

Wondering how to install solar panels on a flat roof? Here are a few things to know before you start the process:

1. It is Possible

The question many people have when it comes to solar and flat roofs is simply, “Can you put solar panels on a flat roof?”

The answer is yes.

Flat roof solar panel arrays follow the rafter system of your roof, thereby optimizing the space available.

While there are several specific design considerations associated with installing solar panels on flat roofs, it’s far from impossible. The key is merely finding a local solar installer who works with flat roofs (and can team up with a licensed, professional roofer) and can help you design your system properly.

2. Flat Roof Arrays Tend to be More Expensive

Installing solar panels on a flat roof often proves more expensive than installing panels on a pitched roof.

There are a few main reasons for this:

• Flat roofs require additional hardware and racking to angle the panels towards the sun, allow for shedding water with gravity, and ensure optimal energy production. This increases the overall cost of the installation.

• Flat roofs often necessitate more extensive and intricate waterproofing measures at the point of penetration between the racking system and the roof itself to prevent leaks, driving the cost up (compared to pitched roofs). This typically adds $3,000-$6,000 to the installation, depending on the roof material type and the number of penetrations that need to be sealed.

• The process of installation on a flat roof can be more labor-intensive, requiring more time and expertise, which results in added labor costs.

• Plan for labor and installation costs on a flat roof to account for approximately 10% of the total installation cost.

Don’t let the slightly higher price tag deter you, though - flat roof solar arrays are an excellent addition to any household. By optimizing available space, they can transform your roof into a highly productive energy source.

3. The Panels on Your Flat Roof can be Installed at an Angle to Catch the Sun

Although you can’t alter the orientation of the panels on a flat roof, these systems provide a small amount of flexibility where the angle of the panels is concerned.

We recommend 10-15 degrees for best results.

This will allow your system to function properly and produce energy efficiently.

The Case for Flat Roof Solar Systems

If you have a flat roof that you’d like to install solar panels on, give us a call!

When you choose a solar installer who has experience with flat roofs and can help you with the process, it’s easy to get the renewable energy system you’ve always dreamed of.

Ready to learn more about solar panels on flat roofs? Contact Sandbar Solar today: (831) 469-8888