The impact of sunlight on clay roofs

Can UV rays damage roof tiles?

There’s a good reason clay tiles have been used as a roofing material for centuries. In general, the impact of sunlight on clay roofs is not a concern when surface finishes and supporting materials are robust and intact. But when exposed to continual heat, UV rays can cause surface finishes to deteriorate and the tiles to expand, placing pressure on the roof.

With ever-increasing, severe weather conditions, expanding and contracting tiles can affect the integrity of the roof as a whole. Nowadays, even in the UK, there is an increased chance of thermal shock, where roofing materials rapidly heat up during the day and cool down in the evening. This extreme temperature change, along with moisture in the air, causes wood and metal beams to expand and warp, which can lead to cracked clay roof tiles.

Benefits of clay roof tiles

Clay roof tiles have several benefits, which makes them a perennial choice for homeowners:

• Highly durable and able to withstand harsh weather conditions, clay roofs offer superior thermal insulation. They help to keep our homes cool in hot summers and cosy during the colder months.
• Clay roof tiles are non-combustible, which makes them fire-resistant. They are usually classed as a grade A material, which is the highest category for fire safety.
• Clay is a non-toxic and mineral-based material, which makes them environmentally friendly. Old tiles can easily be recycled back into manufacturing processes.
• Most importantly of all, clay roof tiles have a long lifespan, often lasting for several decades. So, you won’t have to replace your whole roof after a few years.

Maintaining a Clay Roof

The key to keeping your clay roof at its best is through regular maintenance. Inspect your roof periodically for any signs of damage. If you spot any cracked or loose tiles, address these issues promptly to prevent any potential water leaks.

By keeping the tiles free from debris, leaves, and moss, homeowners can prevent potential water damage and leaks. Sunlight encourages the growth of micro roots, which can compromise the integrity of the tiles. In frosty conditions, this organic matter can expand, causing clay roof tiles to crack.

The best way to maintain a clay roof is to have it professionally cleaned and treated with a quality protective finish. This helps to preserve the integrity of the roof and its aesthetic appeal for years to come. Whether it’s your forever home or you want to make your property saleable, investing into your clay roof will preserve its integrity and maintain its visual appeal.

Cleaning and Restoring Clay Roof Tiles

Our professional roof cleaning team use the RENOTEC® Roof Coating. Guaranteed for 10 years, this coating is highly resistant to UV rays and water repellent, offering superior protection against wet icy and sunny conditions. Based on an organic formula, this coating has been specially designed to repel lichen, moss and algae. RENOTEC® is available in several colours – simply match your preferred shade to your existing clay roof tiles.

In some cases, restoration of clay roof tiles may be required to bring them back to their original condition. Restoration involves deep cleaning, repairing or replacing damaged tiles, and applying the protective RENOTEC® coating. We can restore and revive the appearance and integrity of your clay roof. Our experienced team specialise in restoring clay roof tiles.

To conclude, sunlight can have an adverse impact on roof structures over time. UV rays and extreme heat conditions can affect roof frames supporting clay tiles, leading to cracking. Prolonged exposure to sunlight can result in the fading and deterioration of the vibrant, protective colour finishes that give clay roofs their aesthetic appeal.

Cleaning and treating your clay roof will protect and enhance its longevity. Clay tiles can be easily damaged when care has not been taken, so always use a professional roof cleaning company. We use CAT ladders to prevent anyone stepping onto your roof and damaging your clay roof tiles. We will transform your dull and worn-out roof tiles with our RENOTEC® Roof Coating, which will strengthen the integrity of your clay roof.

For more details on our process and how we work, read our previous blog Refurbing Clay Roof Tiles.