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When customers ask me about flat roof costs, I always say the same thing – it depends on the size of the job, the materials you choose, and how much prep work is needed. For smaller roofs like garages or porches, the price can be quite reasonable. But if you’re looking at a full flat roof replacement on an extension or outbuilding, the cost can add up, especially if the old roof needs stripping off first or there are issues underneath.

There are a few different materials available, and each comes with its own price tag. Traditional roofing felt is often the cheapest option and does the job well if installed properly, though it won’t last as long as some of the newer systems. EPDM rubber and GRP fibreglass are more durable and low-maintenance, but you’ll pay a bit more upfront. It’s all about balancing your budget with how long you want the roof to last – and whether you want to avoid repairs down the line. Labour also plays a big part in flat roof costs, especially if the job is awkward or access is tricky.

To get a proper idea of flat roof costs, it’s always best to get a few quotes from local roofers who’ve seen the job in person. Online estimates are a helpful starting point, but nothing beats a tradesman coming out, measuring up, and talking you through the options. That way, you’ll know exactly what you’re paying for – no surprises, just straight-up advice and a fair price for the work.