Flat Roofs for Extensions
If you’re planning a single-storey extension or looking to add more space to your home and want the best roof for the task at hand, we’re here to ensure your new flat roof stands the test of time.
Growing Demand for Flat Roofs
More homeowners are choosing flat roofs for extensions to create light-filled, modern living spaces. It’s a popular choice for open-plan kitchens, garden rooms and home offices.
Choosing the Right Roof for Yours
Whether you’re extending your home to the side, rear, or wrapping around your property, the roof must be durable, watertight and energy-efficient to protect your new space long-term.
Why PVC Roofing Stands Out
PVC single-ply membranes are designed to handle harsh UK weather. They’re waterproof, UV resistant and built to last — without cracking or fading over time.
Trust High-Tech Membrane Roofing
With over 20 years of experience and trusted relationships with top suppliers, we deliver expertly installed flat roofing systems for domestic extensions.
Cost vs. Long-Term Value
PVC may involve a slightly higher upfront investment, its long lifespan and minimal maintenance make it the smart, cost-effective roofing choice for extensions.
Consumer Protection Accredited
High Tech are proud members of leading consumer protection associations and approved installers, so you can rest assured you’re in safe hands.
Fully Protected with the HomePro Insurance Policy
Your peace of mind is our top priority. When you choose us for a flat roof installation on your home extension, our guarantee is partially underwritten by a HomePro insurance policy. What does this mean for you? In the very unlikely event High-Tech is unable to fulfil our commitment, HomePro will take over all guaranteed liabilities.
We also purchase the HomePro Value Plus policy on your behalf. This is a fully paid-up, underwritten policy that can never lapse, providing long-term protection for your investment. Do keep in mind that guarantee periods within the insurance industry are subject to change. At the time of writing, the maximum available period for a paid-up policy is 10 years.
Flat Roof Extensions: The Smart Choice for Modern Homes
flatFlat roofs are the go-to option for modern home extensions — offering impressive design flexibility, performance and value. Whether you’re planning a rear extension, side return, wraparound or freestanding garden room, a flat roof gives you the freedom to shape your space without compromise. When installed by High-Tech using a high-quality PVC single-ply membrane, your flat roof will not only be safe, sleek and stylish — it will stand up to the demands of the British climate for decades. Our PVC roofing solutions are fully waterproof, UV-resistant, low maintenance and compatible with both warm and cold deck insulation systems.
Thanks to their clean lines and contemporary appeal, flat roofs complement a wide range of home extensions. They’re also generally quicker and more affordable to construct than pitched alternatives, so you can save a great deal on labour and material costs. We can also integrate rooflights and lanterns, bringing more natural light into your kitchen extension, whether that’s a dining area or garden room. With any project, the best starting point is to reach out to our friendly team. We’re always happy to answer any questions you have, so drop us a line and we’ll be in touch to discuss your needs as soon as possible.
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Why Homeowners Trust High-Tech for Flat Roof Extensions
With over 20 years of experience, High-Tech Membrane Roofing specialises in premium PVC single-ply roofing solutions for home extensions. We use top-quality materials from trusted manufacturers like Sika Sarnafil, Bauder and Protan, ensuring every roof is built to perform — and built to last. Our expert installations come with a 20-year transferable warranty, giving you peace of mind that your extension’s flat roof is well and truly protected against the elements for years to come.
Whether you’re adding space to your kitchen, extending to incorporate a studio or building an extra living space, we deliver a reliable, professional and durable flat roof solution that fits seamlessly with your home’s surrounding architecture.
The Rising Popularity of Flat Roof Extensions
, soWhy do the majority of homeowners choose flat roofs for home extensions? There are many different reasons but if you’re looking to enhance your home with a light-filled, versatile spaces that suits modern living — from an open-plan kitchens to a studio, dining area, living space or home office — you need a dependable material that offers freedom and flexibility.
Whether you’re extending out the back, side, or wrapping around your home, choosing the right roof for the job at hand is essential to the performance and longevity of the build. We focus on PVC flat roofing solutions, offering unbeatable weather protection, energy efficiency and minimal maintenance. Designed to handle the UK’s unpredictable climate, they’re a smart long-term investment — and ideal for contemporary design features like rooflights or lanterns.
If you’re working with a builder or architect, we can install the flat roof to your exact specifications and leave you with a 20-year guarantee, so that your new living space is protected for decades to come.
Garage Flat Roofs: Frequently Asked Questions
Do I need planning permission for a flat roof extension?
In most cases, single-storey flat roof extensions fall under permitted development rights, meaning you won’t need planning permission, but it’s always best to check with your local authority or architect.
What makes PVC roofing a good choice for garages?
PVC single-ply membranes offer exceptional durability, 100% waterproof protection, and resistance to UV damage, moss, and algae growth. Unlike traditional materials, PVC requires minimal maintenance and provides long-term reliability, making it ideal for garages.
Are flat roofs suitable for kitchen extensions?
Yes. Flat roofs are a popular choice for kitchen extensions, especially open-plan designs. They’re ideal for incorporating roof lanterns or skylights to create bright, welcoming spaces.
How long does a PVC flat roof last?
A professionally installed PVC single-ply roof can last 30+ years with minimal maintenance. We back our installations with a 20-year insurance-backed guarantee for added peace of mind.
Are flat roofs cheaper than pitched roofs for extensions?
Generally, yes. Flat roofs typically require less labour and fewer materials, making them a more cost-effective option for single-storey extensions.
Client Testimonials
“Really pleased with this company from first meeting with Rob to the office staff to the completion of new flat roof from Matt and Danny nothing too much trouble kept aware of every step would highly recommend.“
“Excellent work completed on flat roofs that were failing, new fascia boards and guttering. Super work completed on a chimney repair. The chaps were friendly, efficient and cleared all the waste in good time.”
“Wonderful company. My elderly father’s roof had a leak and they responded so quickly. All the staff from the office staff to the lovely guys doing the roof were incredibly friendly and professional.”
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High-Tech Membrane Roofing Limited is 100% committed to customer care and satisfaction and providing the very best in flat roof waterproofing, we are a safe and economic choice for flat roofing needs.