24/07/2025
🏠 Understanding Roof Pitch: Why the Right Angle Matters for Your Roofing Project 🛠️
When planning your roofing project—whether it’s a garden pergola, carport, lean-to, or commercial walkway—one of the most critical factors to get right is the pitch (slope) of your roof. At The Polycarbonate Store, we often get asked “Can I install a flat roof?” and our answer is always the same: We strongly recommend a minimum pitch of 10 degrees for the best results—even though some manufacturers list a minimum of 5 degrees.
🌧️ Why You Should Avoid a Flat Roof
While a flat roof might seem simpler to build, it comes with a list of headaches:
• Water pooling: Without proper drainage, rainwater will sit on the surface, leading to material fatigue or even collapse over time.
• Leaks and seal failure: Standing water increases the chance of water ingress, especially around fixings and joints.
• 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 10° or more) allows for:
✅ Proper water run-off
✅ Cleaner appearance over time
✅ Increased durability and performance
✅ Warranty protection in line with product guidance
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🛠️ Pitch-Friendly Roofing Options We Recommend
Whether you’re a DIY enthusiast or working on a commercial build, we offer a range of materials suitable for sloped installations:
🌟 Multiwall Polycarbonate Sheets
• Excellent insulation & strength
• Ideal for conservatories, carports, garden rooms, and more
• Works perfectly with our glazing bars, fixings, and sheet closures
• Requires correct pitch and sealing for best weatherproofing
☀️ Suntuf DIY Corrugated & Beehive Sheets
• Lightweight and easy to install for homeowners
• Perfect for pergolas, lean-tos, and shelters
• Corrugated profile encourages natural drainage when installed on a slope
💎 Ez Glaze – The Glass-Look Polycarbonate
• Flat, sleek design with a high-end finish
• Specifically engineered to work at a minimum pitch of 10°
• Ideal for patio covers, verandas, and modern walkways
• Simple to install with matching glazing components
💧 Corrugated PVC Roofing
• A cost-effective, beginner-friendly option
• Great for sheds, garden buildings, and utility spaces
• 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 optional—it’s essential. It’s the difference between a roof that performs for years and one that causes constant problems.
💬 Have a question about pitch or which product is right for you? Our team at The Polycarbonate Store is here to help!
📲 Visit www.thepolycarbonatestore.co.uk or drop us an email: sales@thepolycarbonatestore.co.uk !
