24/07/2025
๐ Understanding Roof Pitch: Why the Right Angle Matters for Your Roofing Project ๐ ๏ธ
When planning your roofing projectโwhether itโs a garden pergola, carport, lean-to, or commercial walkwayโone of the most critical factors to get right is the pitch (slope) of your roof. At The Polycarbonate Store, we often get asked โCan I install a flat roof?โ and our answer is always the same: We strongly recommend a minimum pitch of 10 degrees for the best resultsโeven though some manufacturers list a minimum of 5 degrees.
๐ง๏ธ Why You Should Avoid a Flat Roof
While a flat roof might seem simpler to build, it comes with a list of headaches:
โข Water pooling: Without proper drainage, rainwater will sit on the surface, leading to material fatigue or even collapse over time.
โข Leaks and seal failure: Standing water increases the chance of water ingress, especially around fixings and joints.
โข Moss and debris build-up: A lack of slope makes it easier for leaves, grime, and algae to settle and stay, shortening the life of your roof.
A pitched roof (preferably 10ยฐ or more) allows for:
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Proper water run-off
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Cleaner appearance over time
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Increased durability and performance
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Warranty protection in line with product guidance
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๐ ๏ธ Pitch-Friendly Roofing Options We Recommend
Whether youโre a DIY enthusiast or working on a commercial build, we offer a range of materials suitable for sloped installations:
๐ Multiwall Polycarbonate Sheets
โข Excellent insulation & strength
โข Ideal for conservatories, carports, garden rooms, and more
โข Works perfectly with our glazing bars, fixings, and sheet closures
โข Requires correct pitch and sealing for best weatherproofing
โ๏ธ Suntuf DIY Corrugated & Beehive Sheets
โข Lightweight and easy to install for homeowners
โข Perfect for pergolas, lean-tos, and shelters
โข Corrugated profile encourages natural drainage when installed on a slope
๐ Ez Glaze โ The Glass-Look Polycarbonate
โข Flat, sleek design with a high-end finish
โข Specifically engineered to work at a minimum pitch of 10ยฐ
โข Ideal for patio covers, verandas, and modern walkways
โข Simple to install with matching glazing components
๐ง Corrugated PVC Roofing
โข A cost-effective, beginner-friendly option
โข Great for sheds, garden buildings, and utility spaces
โข Lightweight yet weather-resistant when properly installed with a slope
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Whether you're going for a multiwall polycarbonate roof or a sleek Ez Glaze finish, a proper pitch is not optionalโitโs essential. Itโs the difference between a roof that performs for years and one that causes constant problems.
๐ฌ Have a question about pitch or which product is right for you? Our team at The Polycarbonate Store is here to help!
๐ฒ Visit www.thepolycarbonatestore.co.uk or drop us an email: sales@thepolycarbonatestore.co.uk !