Roofing

Expert advice on roof repairs, maintenance, replacements, storm damage and everything homeowners need to know about keeping their roof safe, secure and weatherproof.

How To: Remove Roof Moss - Safely

15th January 2021

Moss on the roof isn’t just unsightly, it can damage your tiles and cause damp. Before you make the most of even more time at home by getting up onto your roof to get rid of that moss, it is important that you understand how to do the job properly. A gung-ho attitude could cause more harm than good. We take a look at some common questions about moss on rooves – asked by customers and answered by reliable local traders.

Q1: Is it important to remove moss?

A: Whether you are offended by the appearance of moss or not, the argument to remove it extends far beyond the cosmetic. Moss acts as a sponge, soaking up moisture, rain, hail and snow, and holding it in place on your roof. Eventually, this moisture will leak through and could lead to structural damage. So, to put it simply, if you have significant moss coverage on your roof, get rid of it asap.

Q2: Can I just use the pressure washer?

A: No! Yes, a pressure washer will obliterate your moss, but it will also damage your roof and has potential to cause far greater long-term damage than the moss itself. A pressure washer is just too powerful; it will strip away surface granules and, if you have even the tiniest leak, could cause a leak or flood in your home.

Q3: So, what is the best way to remove moss?

A: As always, if in doubt, contact a professional tradesperson for advice. Clearing the moss from your roof isn’t just about removing the moss, it is about safely accessing your roof without causing further damage to people or possessions. If you can access the moss from a stable set of ladders or a flat roof, then you can remove moss fairly easily and cheaply using a stiff broom and a trowel. Don’t scrub too hard; you don’t want to damage the roof. Use the trowel to loosen stubborn moss, and brush it away with the broom.

Q4: Do moss removal chemicals work?

If you have significant moss coverage, chemical treatment can be a good solution. Although more expensive, chemical treatment kills small moss spores that you won’t necessarily see when cleaning with a trowel and brush, as well as any moss that has got into more hard-to-reach areas. Using chemicals isn’t a quick fix, however. Before you use moss removal chemicals you need to remove most of the moss before covering up any plants or furniture that could be sprayed accidentally during the process. Be aware that moss chemicals won’t just kill or damage your moss – so be extra cautious if you do decide to use it.

If you have moss coverage on your roof and you are not sure about accessing your roof or removing the moss yourself, get in touch with a local handyman or roofing specialist for a quote. If you secure a handyman, you can get him to check your gutters while he is there!

Q5: Can you prevent moss?

A: Copper or zinc strips can be used to prevent moss growth - follow Trust A Trader on Facebook or Twitter to find out more.

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Looking for more roofing advice?

Find clear, practical answers to common roofing questions, helping homeowners understand everyday issues, know what checks they can carry out safely, and when it is best to contact a qualified professional.

How do I know if my roof needs repairing or replacing?

A few broken tiles or a small patch of damaged flashing? That's usually a repair job. But if your roof is over 20 years old, leaks keep coming back in different spots, or you're seeing sagging or widespread cracking, replacement is probably the smarter long-term call. A proper inspection from a roofer will give you a straight answer before you commit to anything.
What are the signs of a leaking roof I shouldn't ignore?

Water stains on ceilings, damp patches on walls, mould in the loft, or daylight peeking through the roof boards - all worth acting on quickly. A musty smell upstairs can also point to a slow leak, even when there's nothing visible. Roof leaks don't fix themselves, and the longer they're left, the more damage they do to insulation, timbers, and your ceilings.
Is moss on my roof a serious problem?

Not an emergency, but don't leave it too long. Moss holds moisture against the tiles, which can work its way underneath and cause cracking in winter. It'll also block your gutters if it spreads far enough. Getting it professionally cleaned and treated is the way to go - it's not a job to DIY given the risks of working at height.
What happens if I delay getting my roof repaired?

Small problems get expensive fast. A few displaced tiles can leave the felt underneath exposed to weather damage, and even a minor leak can cause timber rot, saturate insulation, and eventually ruin ceilings and walls. What could've been a straightforward repair becomes a much bigger project the longer you leave it, so it's best to get it sorted sooner rather than later.
How do I temporarily protect my home if my roof is damaged in a storm?

If tiles are missing or water's getting in, the priority is limiting the damage until a roofer can get to you. A heavy-duty tarpaulin over the affected area is your best bet - make sure it extends well past the damage and is secured so it doesn't lift in the wind. Inside, move furniture out of the way, put buckets down, and use towels to manage any water coming through. Don't go up on the roof yourself as wet tiles are dangerously slippery.
What types of roofing materials are best for UK homes?

Clay and concrete tiles, natural slate, and EPDM rubber for flat roofs are the most common on UK homes. Clay tiles are durable and handle our freeze-thaw winters well - though they're heavy, so not every roof can take them. Slate looks great and can last over a century done properly. For flat or low-pitched roofs, EPDM rubber has largely replaced traditional felt because it holds up much better against UV damage and standing water. The right call depends on your roof's pitch, your property's age, and what the structure can support.
How quickly can I get an emergency roof repair?

Most roofers offer emergency callouts, but response times vary. In quieter periods, someone might get to you within a few hours. After a big storm when everyone's calling at once, you might be waiting a day or more. If there's a delay, get a tarpaulin over the damage in the meantime. One thing to watch: be wary of anyone who knocks on your door unsolicited after a storm offering to check your roof - it's a well-known scam.
What are green roofs and are they worth it?

A green roof has a waterproof layer topped with soil and plants - usually sedums or grasses for a low-maintenance version, or something more garden-like if you want to go further. They insulate well, soak up rainwater, and are good for local wildlife. They can also extend the life of the waterproofing underneath by shielding it from sun and temperature swings. Whether it's worth it depends on your roof's structure and what you're hoping to get out of it. Installation needs to be done professionally - a leak underneath a green roof is a far bigger headache than on a standard flat roof.

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