Solar Panels on Flat Roof - Complete Guide

( Is It Possible to Use Solar Panels on a Flat Roof? )

  • In the UK, solar panel usage is seeing a historic surge, and many families are interested in learning more about how to switch to solar power.
  • They frequently inquire whether solar panels can be mounted on flat rooftops, which is one of the most frequent queries they make. While historically the customary roof pitch ranged from 40° to 50°, flat roofs have actually become quite prevalent in current British construction.
  • We can definitely say YES to your inquiry if your family is one of those that resides in a flat-roof structure. The installation of solar panels on your roof, particularly flat rooftops, will be covered in this article.

Different Roof Pitches for Installing Solar Panels

First, it's good to look at the best roof pitches for installing solar panels to know the pros and cons of each one.

Flat Roofs
-As previously said, flat roofs are among the most popular roof pitches in the UK. Fortunately, there are more benefits than disadvantages to mounting solar panels on flat rooftops.
  • Advantages
    1. Being more economical and using less material per square foot
    2. Easy and quick installation procedure
    3. Less exposure to the elements from the street easier upkeep
  • Disadvantages
    1. When installing solar panels on your flat roof, there are a few more important things you need to think about.
    2. For instance, improper drainage might increase the risk of stagnant water and hasten the demise of your fixtures. To ensure you won't encounter any problems down the road, it is imperative to deal with a skilled specialist.
Low-Sloped Roofs
-In the UK, low-sloped roofs are also typical and can be equipped with solar panels. Here are some of these roofs' benefits and drawbacks.
  • Advantages
    1. Less roofing materials per square feet
    2. Easier and safer installation and repair processes
    3. Better drainage
  • Disadvantages
    1. Longer melting process in case you have heavy snow, and as a result, more pressure on fixtures.
    2. Building codes of your region in the UK must be strictly followed.
Pitched Roofs
-Pitched roofs still exist in the UK, and installing solar panels on them has both advantages and disadvantages.
  • Advantages
    1. The slope brings about better run-off for debris, water, and snow. Lower probability of water buildup, which can lead to leaks and mould damage.
  • Disadvantages
    1. Because of the slope, installing, maintenance, and repair are more challenging and may be less safe and more expensive.

What Roof Material Is Best for Solar Panels?
Metal Roof

There are several benefits to metal roofing. For instance, they are strong and sustainable at the same time.

Furthermore, the standing seams make it simple to attach the solar array, which makes the installation process simple. People on a tight budget should consider this because the labor cost will be somewhat lower.

The ideal form of roof for putting solar panels is generally a standing seam metal roof.

Tile Roof

Another kind of roof is Tile roof.

Tiles are produced from a variety of materials such as metal, ceramic, concrete, bituminous, polymer-sand, composite, and stone.

Tar and Gravel

One of the oldest styles of roof available is this one. Alternating layers of asphalt or tar and specific supporting components are used to position them on the roof.

They make your constructions heavier and the upkeep process more challenging. Additionally, the installation of solar panels can call for additional bracing and other supplies. When installing solar panels, other materials can also be used, including wood, foam, and torch down roofs.

Is Planning Permission Needed for Installing Flat-Roof Solar Panels?
  • Minimal impact on the external appearance of the building and the amenity of the area.
  • Equipment should be immediately removed when you don't need them any longer.
  • You can't install solar panels higher than the highest part of your building's roof (excluding the chimney).
  • Solar panels shouldn't protrude more than 0.2 meters beyond your roof slope plane.
Tips for Installing Solar Panels on a Flat Roof
Consider the Cost of Installing Solar Panels on a Flat Roof

In various parts of the UK, the cost to install solar panels on a flat roof normally ranges between £750 and £900 per kW. This is a lot less expensive than putting PV panels of the same size on a sloped roof, which would cost £1,250 per kW. Furthermore, the price of installing solar panels may vary depending on a number of variables. Such as quantity of PV panels and the mounting technique you use. The argument is that, when compared to other types of roofs, the labour cost for solar panels on flat roofs is significantly lower. Overall, the cost of labour will not be higher than 10% of the cost of a solar panel installation. Keep an eye out for solar panel grants in your area since they might help lower the cost.

Find the Best Angle for Flat Roof Solar Panels

A Stanford University study found that the ideal roof tilt angle for solar panels in the UK is 34°. The normal flat roof angle for solar panels is between 30 and 40 degrees, which increases the likelihood that the panels will absorb sunlight. Additionally, because rain will wash away dirt and debris that could affect the performance of the panel, cleaning solar panels can be done more easily from this perspective. Make sure you hire a qualified individual to complete the task. Professional installers typically use specialized equipment to place panels at the correct angle.

Pay Attention to the Way Solar Panels Are Fixed on Your Flat Roof

You should take caution when having PV panels installed on your flat roof, as was already explained. Solar panels are typically mounted using a “penetration mount” on steep rooftops, which entails drilling many holes in the roof to secure the racking that holds the solar panels. But flat roof solar panel mounting solutions differ slightly from other types. Ballast systems, or weighted mounting systems, are frequently used on flat roofs. Such technologies allow for installation without the requirement of any holes. A flat roof solar panel mounting solution really floats above your roof utilizing gravity, which makes the installation process incredibly simple. You can also use the excellent Bauder roof system, commonly known as BauderSOLAR.

It attaches to the roof without having to pierce the waterproofing of the roof deck because the solar PV module and the substructure are combined into a single unit. This ensures that the integrity of the roof is preserved throughout installation. Additionally, depending on the module you're using, it weighs between 9 and 12.5 kg per square meter. We are aware that locating the best solar panel provider may require spending a significant amount of time conducting research. By giving you up to 4 quotations from several local vendors, we hope to simplify this process for you. This service is entirely unrestricted and without obligation to you. Filling out the contact form at the top of the page is all that is required. We will then link you with the most qualified installers after getting back to you as soon as we can to ask you some additional questions. You may be confident that you received the greatest solar panel quotes!


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