✅ Flat Roof FAQs

Got flat roof questions? We’ve got trusted answers.

Flat roofs are a popular choice for extensions, garages, and modern builds across Canterbury and Kent — but they come with their own set of questions.

Whether you're curious about materials like EPDM rubber, wondering how long your flat roof should last, or trying to work out if you need a full replacement, our team at StoneRidge Roofing has the answers.

This FAQ covers the most common queries from local homeowners and landlords about flat roofing — from costs and materials to repairs and drainage.

📞 Need help with a specific issue? Get a free quote or ask us directly.

Top 10 Flat Roof FAQs

  • EPDM (rubber roofing) is currently the most popular due to its long lifespan, durability, and low maintenance. We also offer felt and GRP (fibreglass) depending on your needs. See our materials guide

    • EPDM: 20–30 years

    • Felt: 10–20 years

    • GRP/Fibreglass: 20–30 years
      Proper installation and drainage are key to reaching full lifespan.

  • Costs vary by size, material, and condition of the existing roof. Most residential flat roof replacements in Kent start from £1,000+. Get a tailored price on our Quotes & Pricing FAQs.

  • No — flat roofs get a bad reputation due to poor past installations. Modern flat roofing systems, especially EPDM and GRP, are highly waterproof when properly installed.

  • Sometimes, yes — particularly with EPDM overlays. But we always assess whether it’s best to remove and replace. Ask us for a Free Quote.

  • Not usually. Most single-storey flat roof extensions fall under permitted development, but it’s worth checking with Canterbury City Council or asking us.

  • Most single flat roofs (garage or extension) take 1–2 days, depending on complexity and weather.

  • Yes — we offer warm roof systems which include insulation above the joists. It improves energy efficiency and complies with Building Regs.

  • We ensure correct falls are built into the roof and use tapered insulation or outlets to keep water flowing properly.

  • Yes — but only if it’s been reinforced or designed for foot traffic. Let us know and we’ll use the right materials for accessibility.

🧰 Need help with your flat roof?
From small repairs to full replacements, we install durable, leak-proof flat roofs across Canterbury and Kent.

👇 Get a free quote today — no obligation