Australia is known for its abundant sunshine, making it an ideal location for harnessing solar energy. With solar power becoming increasingly popular, many homeowners are eager to install solar panels on their roofs. However, solar installers often express their reluctance to work on tiled roofs. This article explores the reasons behind why solar installers in Australia have a love-hate relationship with tiled roofs.
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How solar panels are installed on tiled roofs?
Solar panels can be installed on many roofs, including tiled roofs. The most common method is to install mounting brackets to the rafters and use a rail system. The rails are then attached to the brackets, and the solar panels are attached to the rails.
Here is a detailed breakdown of the installation process:
- Pre-installation inspection and measurement. The first step is to assess the roof and determine the best place for the solar panels. The installers will also take measurements to ensure that the brackets and rails are installed in the correct locations.
- Removing tiles. The installers will remove tiles in the area where the solar panels will be installed. This is necessary to access the rafters and roof structure.
- Fitting the mounting brackets. The installers will attach stainless steel mounting brackets to the rafters. The brackets will be spaced evenly and secured in place.
- Installing the rail system. Aluminium alloy rails are placed across the roof and fixed to the brackets. These rails are the anchor point for the solar panels.
- Fitting the solar panels. The solar panels are attached to the rails using clips that bolt onto the panels’ edges. The panels are then aligned and secured in place.
- Connecting the electrics. The electrical cables from the solar panels are connected to one another and then to the inverter. The inverter converts the DC electricity from the panels to AC, which can power your home.
Factors to consider for installation
There are a few factors to consider before installing solar panels on a tiled roof:
- Roof integrity. Solar panels add extra weight to a roof, so it is important to ensure it is strong enough to support the panels.
- Roof pitch. Solar panels function best on roofs with a pitch between 10 and 45 degrees. Flatter roofs may require additional support structures.
- Roof orientation. Solar panels perform best on south-facing roofs in the Northern Hemisphere and north-facing roofs in the Southern Hemisphere.
- Shading. Solar panels need direct sunlight to produce electricity, so it is important to ensure trees or other objects do not shade the roof.
Reasons why solar installers hate tiled roofs in Australia
Tiled roofs are Australia’s most common type of roof, accounting for over 70% of all residential roofs. However, solar installers often dread dealing with tiled roofs, as they can be significantly more difficult to install solar panels on than other types, such as metal roofs.
Fragility and weight
Tiled roofs are both fragile and heavy, making installing solar panels challenging. Solar panels require secure anchoring to the roof to ensure they can withstand various weather conditions, including strong winds and heavy rain. Tiled roofs are often delicate, and the weight of solar panels, combined with the necessary mounting equipment, can pose a risk of damaging the tiles during installation. This increases labour and material costs as installers must take extra precautions to avoid breakage.
Increased installation time
The fragility of tiled roofs means that solar installers must spend more time carefully installing panels. This increased installation time can make solar projects on tiled roofs less profitable and less efficient than installations on more robust roofing materials such as metal or asphalt shingles. Solar installers may need to charge higher rates for tiled roof installations to compensate for the additional time and labour required.
Delicate wiring and drilling
Drilling into tiled roofs is a delicate process. Proper installation requires making holes in the tiles to secure the mounting brackets and wiring. These holes need to be well-sealed to prevent leaks. Drilling into tiles without breaking them and sealing them correctly requires precision and experience. Solar installers may need to invest in specialised tools and training to work with tiled roofs effectively, further increasing the cost and complexity of installations.
Maintenance and repairs
Solar panels on tiled roofs can be more challenging to maintain and repair. If a tile becomes damaged or needs replacement, it may require the removal of solar panels, adding extra labour and cost. In contrast, asphalt shingles or metal roofs are often easier to repair and maintain. This can be a significant drawback for homeowners who may need to address roofing issues in the future.
Limited space and aesthetics
Tiled roofs are known for their intricate designs and patterns, which can limit the available roof space for solar panels. In many cases, installers may have to work around these patterns, reducing the number of panels that can be installed and potentially limiting the system’s energy-generating capacity. Additionally, some homeowners are concerned about the aesthetics of solar panels on their tiled roofs, which can affect the property’s visual appeal.
Additional costs
The challenges associated with installing solar panels on tiled roofs often incur additional costs. Solar installers may need to invest in specialised equipment, insurance, and training to ensure the safety and success of such installations. These costs are typically passed on to the homeowner, making solar panel installations on tiled roofs more expensive.
Roof age and condition
Solar installers in Australia also need to assess the age and condition of the tiled roof before installation. Older roofs may be more fragile, and solar panels could exacerbate existing issues. In some cases, roof repairs or replacements may be necessary before solar panel installation can proceed, adding even more costs to the project.
Increased risk of roof leaks
Tiled roofs are more prone to leaks than other roofs. Tiles can crack or become loose over time, allowing water to seep into the roof. Installing solar panels on a tiled roof can increase the risk of leaks, as the panels can create additional stress on the roof.
Limited solar panel placement options: The placement of solar panels on a tiled roof is often limited by the location of the roof rafters. This can make it difficult to optimise the solar panel system’s performance.
Limited access
Tiled roofs often have a lot of hips and valleys, making it difficult for installers to access the roof trusses and attach the solar panels. This can make the installation process more time-consuming and difficult.
Despite the challenges, installing solar panels on a tiled roof is possible. However, it is important to choose a qualified and experienced solar installer with experience installing solar panels on tiled roofs.
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Some tips for choosing a solar installer to install solar panels on your tiled roof
What can mitigate the challenges of installing solar panels on tiled roofs?
Several things can be done to mitigate the challenges of installing solar panels on tiled roofs:
- Make sure to choose a qualified and experienced solar installer with experience working with tiled roofs.
- Get multiple quotes from different solar installers before making a decision.
- Make sure that the solar installer has the proper insurance and licensing.
- Ask the solar installer to provide a detailed installation plan that outlines how they will protect the roof from damage during installation.
- Ask the solar installer to provide a warranty on their workmanship.
If you have a tiled roof and are considering installing solar panels, carefully weigh the pros and cons. Solar panels can be a great way to save money on your energy bills and reduce your carbon footprint. However, it is important to know the challenges of installing solar panels on a tiled roof and to choose a qualified and experienced solar installer.
Read more about solar panel installation
- Solar Panel Theft and Security – Anti-theft Devices
- Solar Panel Systems in Australia – Tips, Prices & Key Info
- Why You Need to Secure Your Solar Panels
- How to Test, Calculate And Maximise Your Solar Panel Output
- Rooftop Solar Power Panels: How many can you install?
- How Many Solar Panels Needed To Power A Home?
- How to Make Your Solar Panels Last Longer in Australia
- Solar Photovoltaic (PV) System: All You Need To Know
- What size solar system will I need for my home?
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