Flat Roof Solar Panels
Expert flat roof solar panel installations across Reading and Berkshire.
Local, trusted, and professional flat roof solar panel installations
If you have a flat roof, you might assume solar panels aren't an option. In fact, flat roofs can be an excellent surface for solar PV, often offering more usable space than a pitched roof and greater flexibility in how panels are positioned. Tethys Energy designs and installs flat roof solar panels for homeowners across Reading, Wokingham, and Berkshire, tailoring every system to the property and the roof it sits on.
A flat roof doesn't mean you miss out on solar. With the right mounting system, flat roof solar panels can be installed at the perfect angle for your location, delivering all the same energy savings as a conventional installation, just from a different starting point.
Solar Panel Installations Are a Top Choice for Eco-Conscious Customers.
How flat roof solar panel systems work
Mounting systems that do the work
On a pitched roof, the slope itself sets the angle of the panels. On a flat roof, that job falls to the mounting system. Flat roof solar panels are installed on angled frames, typically set between 10° and 30°, that tilt the panels toward the sun and compensate for the lack of natural pitch.
At Tethys Energy, our preferred flat roof mounting system is the Van der Valk ValkPro+, one of the most trusted and widely specified flat roof solar mounting systems available. It's a ballast-based system, which means the frames are weighted down with ballast blocks rather than fixed through the roof surface. There's no drilling, no penetration of the roof membrane, and no risk of leaks. The ballast weight is carefully calculated for each installation using wind tunnel tested data and Eurocode structural standards, ensuring the system stays secure in all conditions without placing unnecessary load on the roof structure.
The ValkPro+ supports both south-facing and east-west panel orientations and is compatible with the most common flat roof membrane types, including bitumen, PVC, and EPDM. Each installation is designed around your specific roof, its surface, structure, load capacity, and available space.
One important consideration with any flat roof system is row spacing. Panels raised on angled frames will cast a shadow, and if rows are placed too close together, the panels in front will shade the ones behind. Getting this spacing right is a key part of the design process, and something we calculate for every installation as standard.
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Short video about how solar panels work and their benefits.
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Considering taking the plunge and making the switch to clean and green Solar PV? Get a quality solar panel installation quote from Tethys Energy.
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Solar Panel Installations Are a Top Choice for Eco-Conscious Customers.
Is my flat roof suitable for solar panels?
What we check before recommending a system
Not all flat roofs are the same, and not all are immediately ready for solar panels, but many can be made to work with the right approach. Suitability depends on a number of factors: the age and condition of the roof, the covering material, its load-bearing capacity, and how much unshaded, unobstructed space is available.
A structural assessment is a standard part of any flat roof solar installation. Before we recommend a system, we need to confirm the roof can handle the additional weight of the mounting frames and ballast, and that the covering is in good enough condition to justify the investment.
It's also worth bearing in mind that flat roof systems require more space per panel than a pitched roof installation. The angled frames take up footprint, and the row spacing needed to prevent shading means the panels can't be packed in as tightly. Obstructions such as air conditioning units, skylights, extraction vents, and roof access hatches all reduce the usable area and need to be factored into the design.
If you're unsure whether your flat roof is suitable, the best starting point is a site survey. We'll assess the roof before making any recommendations, so you get an honest picture of what's possible, with no obligation to proceed.
Respected and Trusted Solar Panel Installers In Reading, Berkshire.
Benefits of flat roof solar panels
More flexibility than you might expect
Flat roof solar installations come with a number of genuine advantages over their pitched roof equivalents:
- Panels can be oriented and angled freely, not constrained by the existing roof pitch or direction, making it easier to maximise solar exposure for your specific location
- Flat roofs often offer more total usable space than a pitched roof, allowing for a larger array and greater energy generation
- Ballasted systems like the ValkPro+ require no roof penetration, reducing the risk of leaks and helping preserve your existing roof warranty
- Easier and safer to access for maintenance and cleaning than panels fixed to a pitched roof
- With careful design, the same overall system output as an equivalent pitched roof installation is entirely achievable
- Can be paired with a solar battery storage system to store surplus energy and reduce your reliance on the grid even further
- Same long-term financial benefits as any solar PV system: reduced energy bills, income through the Smart Export Guarantee, and added value to your property
Because you're not tied to the pitch and direction of an existing roof, flat roof solar panels can be positioned to maximise solar exposure for your location. With a well-designed system, you can expect performance on a par with a conventional installation, and often a larger array too, thanks to the space a flat roof typically provides.
Reading, Finest Renewable Energy Company For Homeowners In Berkshire.
Flat roof solar panels vs pitched roof solar panels
Different roofs, same outcome
Whether your roof is pitched or flat, the end result is the same: a solar PV system generating clean energy for your home and reducing your energy bills. The difference is in the installation approach. On a pitched roof, panels are typically mounted flush to the existing slope, the angle and direction are set by the roof itself. On a flat roof, mounting frames do that job instead, which gives your installer more control over positioning but does require more roof space per panel due to the row spacing needed to prevent shading.
Flat roof installations can carry slightly higher installation costs than an equivalent pitched roof system, due to the additional mounting framework involved. That said, the ValkPro+ is designed for fast, efficient installation, which helps keep labour time and costs in check.
Our job is to assess what your property has to work with and recommend the right approach for it, whether that's a flat roof system, a pitched roof installation, or in some cases, a ground mount. Get in touch and we'll give you an honest steer.
Accredited Flat Roof Solar panels Installation Engineers In Reading, Berkshire
Planning permission for flat roof solar panels
Usually permitted development, but there are exceptions
In most cases, installing solar panels on a domestic flat roof falls under Permitted Development Rights and does not require planning permission. However, there are exceptions. If your property is listed, in a conservation area, or if the panels would protrude more than 200mm above the roofline, you may need to obtain consent before going ahead. Commercial properties are almost always subject to planning requirements, regardless of system size.
We'll flag any planning considerations as part of the survey and design process, so there are no surprises further down the line. If you're unsure what applies to your property, get in touch and we can advise you.
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Why choose Tethys Energy for your flat roof solar installation?
Local experts. In-house teams. No hidden fees.
Here's why homeowners across Reading and Berkshire choose Tethys Energy for their flat roof solar installations:
- Over 10 years designing and installing solar PV systems, with in-house expertise going back almost 20 years
- We use our own installation teams, no subcontractors used on any of our installs
- Every flat roof system is designed around your specific roof: its structure, covering, load capacity, and available space
- We use the Van der Valk ValkPro+ mounting system, a ballast-based, non-penetrating solution that protects your roof and is wind tunnel tested for long-term stability
- Full project management from site survey to switch-on
- 100% no-quibble guarantee of workmanship
- No hidden fees, the quoted price is the final price
- MCS Certified | NAPIT Approved | Which? Trusted Traders | RECC
Your Guarantee
With Tethys Energy, there are absolutely no hidden fees. What's quoted is what it will cost. All our work comes with a 100% no-quibble guarantee of workmanship, backed by NAPIT, RECC & MCS for your peace of mind.
Get in touch today to arrange your consultation and quote.
Got Questions? Not Sure If It's Right For You? Get In Touch, We Can Help
What our happy customers say
We pride ourselves on our excellent service and believe in always going the extra mile to make sure you get great value for money and the highest standards of workmanship. Read what some of our happy customers have to say about Tethys Energy on Which? Trusted Traders.
Excellent work...
"On time, on budget, professionally done and set up, including replacement of an inverter which was broken on arrival. Top of the line equipment used throughout."
Prompt and efficient...
"Jason did a great job of getting my PV array back working. I have recently taken over the array from another family member, so did not understand anything about it except that it wasn't working. Jason came, quickly figured out what the fault was, and fixed it with no fuss or bother."
Fantastic Service...
"Jason responded to my request for a second opinion promptly. I was "cold called" by a company offering a free check on my 6 year old solar energy system. They then tried to tell me the system was working at 72% capacity, that they would replace my inverter and install optimisers for £5,500 but special offer if i signed a contract there and then for £4,500. Needless to say I declined. I contacted Which? Trusted Traders for advice and was given Jason's name. He checked my system, found no problems and told me if anything it was performing better than expected."
Get A Quote Today
Interested in solar panels for your flat roof?
Get in touch with the Tethys Energy team for impartial advice and a no-obligation quote.
We'll assess your roof, design a system around your energy needs, and handle everything from survey to switch-on.