Flat roofs are a common feature on extensions, garages, dormers and garden rooms across Surrey and Berkshire. They’re practical and versatile, but they also face a tough test every winter. Heavy rain, strong winds and freezing temperatures can quickly expose any weaknesses.
The good news is that a little preparation in autumn can prevent costly leaks and repairs later. Here’s how to get your flat roof ready for winter and how to tell when it’s time to call in a professional.
Unlike pitched roofs, flat roofs don’t shed water quickly. They rely on a slight fall and clear drainage to move rainwater away. When outlets become blocked or the surface develops dips, water can sit on the roof for long periods.
Over the winter months, that standing water, combined with repeated freezing and thawing, puts extra strain on the roof covering. Small cracks can widen, joints can open up and a minor problem can turn into a leak.
Autumn leaves are one of the biggest causes of flat roof problems. Leaves, moss and debris collect around outlets and in gutters, stopping water from draining properly.
Making sure drainage is clear before winter is one of the simplest ways to protect your roof. If your flat roof is easy and safe to see from a window or the ground, check it after leaf fall. If it isn’t, ask a professional to do it for you. Never climb onto a roof unless it is safe to do so.
Flat roofs usually give plenty of warning before they fail. Look out for:
Catching these issues early usually means a simple repair rather than a full replacement.
The edges of a flat roof and the points where it meets walls, chimneys or rooflights are particularly vulnerable. Strong winter winds can lift loose trims and flashing, allowing water to get underneath the roof covering. Make sure edge trims are secure and that flashing is firmly in place before the stormy weather arrives.
Overhanging branches drop leaves onto the roof, block drainage and can cause damage if they break in high winds. Trimming them back in autumn reduces debris and lowers the risk of storm damage. It can also reduce shading if you have, or are planning, solar panels.
Every flat roof has a lifespan. Older felt roofs in particular may be nearing the end of their working life, especially if they’ve been patched several times. If your roof is ageing, it may be more cost effective to replace it than to keep repairing it.
Modern flat roofing systems such as EPDM rubber and GRP fibreglass are designed for long term durability and excellent weather resistance. If you’re replacing your roof, it’s also a good time to consider a warm roof system, which adds insulation above the deck to help keep your home warmer and more energy efficient through winter.
If you’re thinking about adding solar panels to a flat roof, the condition of the roof itself is essential. Installing panels on a roof that will need replacing in a few years can mean removing and refitting the system later. Our guide to installing solar alongside a new roof explains why planning both together makes sense.
A professional flat roof survey can identify problems you can’t see from the ground, such as early membrane damage, failing joints or poor drainage. You’ll get a clear picture of your roof’s condition and honest advice on whether it needs maintenance, a repair or a replacement.
Autumn is an ideal time for a survey, as it allows any work to be carried out before the worst of the winter weather. You can read more in our guide to why autumn is the best time for a flat roof survey.
As well as solar, Sheerwater Solar now offers flat roofing for domestic and commercial properties. We install and repair EPDM, GRP, high performance felt, warm roof systems and liquid waterproofing, using premium materials and fully guaranteed workmanship.
Worried about your flat roof this winter? Book a free flat roof survey with Sheerwater Solar before the worst of the weather arrives. Our experienced team will assess your roof, explain any issues clearly and give you honest, no obligation advice.
Before you invest in solar, it’s important to make sure your roof is ready for the job. A solar system is designed to last for decades, so the surface it sits on needs to be safe, secure, and in good condition. At Sheerwater Solar, we work on roofs across Surrey every week, which means we see...
Reaching out to Sheerwater Solar is straightforward and hassle-free. Whether you’re interested in solar panels for your home or business in Woking, we’re here to guide you every step of the way. You can contact us directly by calling 01932 627 555 or by sending an email to info@sheerwatersolar.co.uk.
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What happens next?
In most cases, we’ll need to conduct an on-site survey at your property to assess the feasibility and provide you with a tailored quote. This visit allows us to understand your specific needs and explore the potential for renewable energy solutions. Following the survey, we’ll discuss the best options for integrating solar energy into your property, including detailed costs and the installation process.
We’re excited to assist you on your journey to renewable energy and look forward to hearing from you.