Is moss on roof tiles a problem?

When undergoing an annual roof inspection, one of the most common issues flagged is moss growth. An experienced roofing contractor will advise whether it’s adversely affecting your roofing, as moss may pose a risk to the stability of your tiles, for example. But how much should you worry about its growing presence on your roof?

Here are some reasons that moss on roof tiles may be an issue.

Roof tile distortion

When moss grows under and around your roof tiles, it can disrupt their formation, causing some of them to become loose as they lift. This can also accelerate issues in the colder months if water gets in between and underneath tiles. If temperatures drop below zero and ice forms, the water will expand as it freezes, causing slates and tiles to crack. This makes them even more vulnerable if storms hit, and they may break off entirely.

Wet roof conditions

The added moisture held on your roofing can cause problems over time, including rotting timber and decomposition, especially if water works its way into the sublayers of your roofing or loft space. If you don’t pick up on these developments early, you may find yourself having to pay for costly roof repairs further down the line, especially if there’s damp insulation within the rafters. That’s why internal roof inspections are vital each year, looking for signs of damage in your attic or loft.

Extra roof weight

Over the years, all roofs age and deteriorate as they face many harsh weather conditions. Unfortunately, if you don’t maintain your roof and rectify concerns early, it could speed up the ageing process. Water-logged moss adds weight to your roofing, putting extra strain on its supporting elements.

Blocked guttering

As well as roof tiles, moss can grow across the entirety of your roof, including areas of your guttering. If this happens, the added debris and water can cause gutters and downpipes to become clogged and start overflowing, reducing the effectiveness of your property’s rainwater drainage system. Always ask for your gutters to be checked during inspections to help prevent this problem from occurring.

Reduced kerb appeal

As well as functional issues, moss can also affect the kerb appeal of your home or business property, especially if you have a tiled roof. Moss looks unsightly, growing rapidly in damp conditions. Unfortunately, clay and concrete tiles are particularly susceptible to moss growth due to their porous nature, creating the ideal environment for algae to spread fast.

If you’re selling your home, you may want to tackle any moss growth on your roof first so that it doesn’t put off potential buyers or raise questions about the condition of your roofing.

Spotted moss on your roof? Ask for a roofing inspection

If you’ve spotted moss on your roof, book a roofing inspection with our team. At Collier Roofing, we deal with all types of roof issues and repairs, maintaining both flat and pitched roofing. We work across Surrey, London and surrounding areas, coming out to properties in Oxted, Redhill and beyond.

To book a roofline inspection, contact us now.