Switching to solar energy is a smart investment, but if your home or business has a tile roof, you may be wondering how that affects the installation process. Tile roofs—particularly lightweight ones—present unique challenges that require specialized installation techniques to ensure durability and roof integrity.
At Sunhub, we help businesses connect with the right solar resources, making it easier to navigate the complexities of solar installation on different roofing materials. In this blog, we’ll break down the key considerations for installing solar panels on tile roofs, the best installation methods, and the benefits of doing it the right way.
Understanding tile roofs and their challenges
Tile roofs are popular in warm, sunny climates, especially in the southwestern United States. They are often made from materials like clay or concrete and are available in three common shapes:
- “S” tile – Curved tiles that resemble waves when installed.
- “W” tile – Similar to “S” tiles but with a more pronounced shape.
- Flat tile – Sleek, modern-looking tiles that sit flush against the roof.
Lightweight tiles weigh less than nine pounds per square foot, making them less durable than their heavyweight counterparts. While they provide excellent protection against the elements, they are brittle and prone to cracking under pressure.
Walking on a tile roof for repairs or maintenance can result in breakage, and the same risks apply when installing solar panels. If not done correctly, the installation process can damage the tiles, compromise the roof’s underlayment (the protective layer beneath the tiles), and lead to leaks or other structural issues.
Why traditional installation methods don’t work on tile roofs
A common approach for solar installation on standard roofs involves mounting solar panel racking directly onto the roofing material. However, on lightweight tile roofs, this method can lead to problems such as:
- Tile breakage – The added weight and pressure of solar panel mounting hardware can crack fragile tiles.
- Roof leaks – Drilling into the tiles and underlayment can weaken the roof’s waterproof barrier.
- Long-term wear and tear – Wind and environmental factors can cause vibrations between the panels and the roof, leading to further damage over time.
To avoid these risks, specialized techniques must be used when installing solar panels on tile roofs.
The best way to install solar panels on tile roofs
One of the most effective and recommended methods for installing solar panels on tile roofs is the inset solar installation, also known as a “comp-out”. This method ensures both durability and a clean, seamless look.
How the inset solar installation works
- Tile removal – A roofing professional carefully removes the tiles in the area where the solar panels will be installed.
- Composite shingle installation – Instead of placing solar panels directly on fragile tiles, a layer of composite shingles (the same material used on asphalt shingle roofs) is installed in the designated solar panel area. This provides a stable, durable base.
- Waterproofing – Sheet metal flashing is added to seal transitions between the shingle area and the surrounding tiles, ensuring the roof remains waterproof.
- Solar panel mounting – Solar panels are securely installed on the composite shingle section, preventing damage to the original tile roof.
- Tile reintegration – The removed tiles are placed around the solar array, creating a clean and natural look that blends seamlessly with the rest of the roof.
This technique not only prevents damage but also ensures that the solar panels have a solid foundation for long-term performance.
Benefits of an inset solar installation
1. Preserves roof integrity
Since solar panels are mounted on composite shingles rather than fragile tiles, the risk of breakage and roof damage is significantly reduced. The underlayment remains intact, protecting your home from leaks and structural issues.
2. Aesthetically appealing
An inset solar installation creates a sleek, integrated look that makes it seem like the home was designed with solar power in mind. Many modern homebuilders are now using this method to maintain architectural aesthetics while incorporating solar energy.
3. Long-term durability
By reducing stress on the tiles and preventing direct contact between the panels and the roofing material, this installation method minimizes wear and tear. This ensures that both the solar system and the roof last for decades.
4. Potential tax benefits
The Solar Investment Tax Credit (ITC) may apply to solar installation-related roofing upgrades. If the composite shingle installation is necessary for your solar project, you may be eligible for tax credits that help offset the cost.
5. Extra tile storage
When tiles are removed for the inset installation, they can be kept as spares for future roof repairs. This is especially beneficial if your tile style is discontinued or difficult to match.
Why choosing the right installer matters
Some solar companies may attempt to install solar panels on tile roofs without using the comp-out method, but this can lead to costly problems down the road. A poorly executed installation can result in cracked tiles, water leaks, and long-term roof damage.
When selecting a solar installation provider, make sure they:
- Have experience working with tile roofs.
- Use proven installation techniques like inset solar mounting.
- Offer a strong warranty on both the solar system and the installation work.
Sunhub’s B2B solar platform connects businesses with reliable solar providers and installation experts who understand the complexities of solar projects on different roofing materials.
Final thoughts: A smart investment for tile roof owners
Installing solar panels on a tile roof requires extra care, but when done correctly, it offers a long-lasting, efficient, and visually appealing solution for clean energy. By choosing an inset solar installation, you can protect your roof, maximize the lifespan of your solar system, and enjoy the financial and environmental benefits of solar power.
If your business is in the solar industry, ensuring proper installation methods for tile roofs can set you apart as a trusted provider. Sunhub makes it easy for solar businesses to find the right materials, partners, and solutions to support high-quality solar installations.
As solar adoption continues to grow, understanding the best practices for different roof types will be essential for delivering top-tier solutions to customers. Whether you’re a solar supplier, installer, or distributor, Sunhub provides the connections you need to succeed in the evolving solar market.