Single Ply Membrane
Request A Callback
A single ply membrane roof is one of the most reliable ways to waterproof a flat or low-pitch roof, and it’s the system many UK homeowners, property managers, architects and facilities managers now request by name. The Flat Roofing Company installs, maintains and repairs single ply roofing membranes on residential, commercial and industrial buildings across the UK, using materials and techniques that hold up against the demands of the British climate.
If you manage a warehouse roof, a school extension or a home flat roof, the information below will help you make an informed decision, and our team is on hand to talk through the details for your specific building.
Trusted & Reliable
EcoFriendly
20 YearWarranty
What Is a Single Ply Membrane?
A single ply membrane is a flexible waterproofing sheet, usually made from EPDM rubber, PVC or TPO, that’s laid across a flat or low-pitch roof in one continuous layer. Unlike traditional built-up felt roofing, which relies on several layers bonded together, a single ply roofing system uses one sheet, mechanically fixed, fully bonded or ballasted to the roof deck, with joints sealed to form a continuous waterproof barrier.
This single-layer approach makes the material lighter and more flexible than older flat roofing methods such as GRP roofing or traditional felt. Because the membrane can stretch and move with the building, it’s less prone to cracking in extreme temperatures, which is one reason single ply membrane flat roof systems have become the standard choice for large commercial roofs as well as domestic flat roof extensions.
Request call back - get an installation estimate
Types of Single Ply Roofing Membrane
Not every single ply roof membrane is the same. The right choice depends on the building, the budget, and how the roof will be used.
EPDM Single Ply Membrane
EPDM (ethylene propylene diene monomer) is a synthetic rubber membrane and one of the most widely used single ply roofing membranes in the UK. It’s valued for its flexibility, UV resistance and long service life, often exceeding 25 to 30 years when installed correctly. EPDM single ply membrane is a popular option for both domestic flat roofs and larger commercial applications because it performs well in a wide range of temperatures without becoming brittle.
Alwitra Single Ply Membrane
Alwitra is a recognised manufacturer of high-performance single ply membranes, including PVC-based systems used extensively across commercial and industrial roofing projects in Europe and the UK. Alwitra single ply membrane products are known for consistent quality control and strong technical backing, which matters on larger projects where warranty terms and manufacturer accreditation are part of the specification.
PVC and TPO Single Ply Membranes
PVC membranes offer strong resistance to chemicals, oils and pollutants, making them a common choice for roofs near industrial processes or restaurant extraction systems. TPO (thermoplastic polyolefin) membranes combine some of the flexibility of EPDM with the heat-weldable seams of PVC, giving installers a strong, durable joint without solvent-based adhesives.
Reinforced vs Non-Reinforced Membranes
Reinforced membranes include a polyester or fibreglass scrim within the material, adding puncture and tear resistance. This makes them suitable for roofs that see foot traffic, plant equipment or ballast. Non-reinforced membranes are more flexible and often used where the roof will remain undisturbed, though they generally need more careful handling during installation.
Benefits of a Single Ply Roofing System
A well-specified single ply roofing system brings together several practical advantages for building owners. The seamless, fully sealed nature of a single ply membrane gives it excellent waterproofing performance, and properly welded or bonded joints leave no gaps for water to track through, which is why the system performs so well on roofs with limited falls or complex detailing around upstands, rooflights and plant.
Beyond waterproofing, single ply membranes bring several further practical benefits. They’re significantly lighter than built-up felt or asphalt systems, which reduces loading on the roof structure, and they remain flexible in cold weather, reducing the risk of cracking. They also require comparatively little ongoing intervention once installed correctly, which keeps long-term running costs down and makes them a practical choice for building owners managing multiple properties.
For roofs that also need to manage biodiversity or drainage requirements, a single ply system can be combined with a green roof build-up. This flexibility across different roof types and building uses is one of the main reasons single ply membranes have become the standard specification for new-build and refurbishment flat roofs across the UK.
Single Ply Membrane Roof Installation Process
Installing a single ply membrane roof properly involves several distinct stages, and skipping or rushing any one of them is where most roof failures start. From the initial survey through to final sign-off, each stage builds on the last, and the quality of the finished roof depends on how carefully each step is carried out. Our installation teams follow the same structured process on every project, regardless of size, to make sure nothing is missed and every detail is accounted for before the membrane goes down.
Site Survey and Roof Assessment
Every project starts with a full roof survey. Our team checks the existing deck, falls, drainage points and any areas of standing water or damage, and identifies detailing around rooflights, upstands and plant equipment that will need specific attention.
Preparation and Substrate Requirements
The substrate needs to be sound, dry and free from debris before installation begins. Depending on the existing roof, this might mean stripping back to the deck, repairing damaged sections, or installing new decking where the original structure isn’t suitable to build on.
Membrane Fitting and Sealing Techniques
The membrane is rolled out and fixed using the method appropriate to the material and roof type: mechanical fixing, full adhesive bonding, or ballasted loose-lay. Joints are then sealed using hot-air welding for PVC and TPO membranes, or specialist tape and adhesive systems for EPDM, forming one continuous waterproof layer.
Quality Checks and Sign-Off
Once fitted, every seam and detail is checked, and on larger commercial projects this often includes a manufacturer inspection to validate the system warranty. A completed project is signed off with clear documentation, including any guarantee paperwork the client will need for building records or insurance purposes.
Thermal Performance and Insulation for Single Ply Membrane
Insulation for single ply membrane roofs is typically installed beneath the membrane as part of a warm roof build-up, with rigid PIR (polyisocyanurate) boards being the most common choice due to their high thermal performance per millimetre of thickness. The insulation thickness is calculated to meet current Building Regulations Part L requirements, and on refurbishment projects it’s often possible to increase insulation depth significantly compared with the original roof build-up.
Getting the insulation right does more than meet regulations. It reduces heat loss through the roof, lowers heating costs, and helps prevent condensation within the roof structure, which protects the timber or steel deck underneath.
On commercial buildings, better thermal performance also supports EPC ratings and sustainability targets, which is increasingly relevant for facilities managers reporting on building performance. Getting the insulation specification right at the design stage also avoids costly upgrades further down the line, particularly on buildings where roof access is limited or expensive to arrange.
Single Ply Membrane Roof Maintenance and Repairs
One of the appeals of a single ply membrane roof is how little attention it needs once installed, but “low maintenance” doesn’t mean “no maintenance.” Small issues left unchecked, a lifted flashing, a blocked outlet, a minor puncture, can develop into much larger problems if they go unnoticed for too long. A modest, consistent maintenance routine is usually all it takes to keep a single ply roof performing well for its full expected lifespan, and it’s far more cost-effective than dealing with water damage after a leak has already reached the building below.
Routine Maintenance Requirements
Single ply roofing needs comparatively little upkeep, but regular checks make a real difference to lifespan. We recommend at minimum an annual inspection to clear debris from outlets and gutters, check for any lifted flashings, and confirm that seams and detailing remain intact.
Common Issues and Repair Solutions
The most common issues on ageing single ply roofs are seam failure, punctures from foot traffic or dropped tools, and detailing failures around penetrations such as pipes or rooflights. Most of these are straightforward to repair when caught early, typically involving a patch weld or bonded repair section that restores the waterproof layer without needing to replace the whole roof. Our Roof Repairs team handles everything from small patch repairs to more involved detailing work.
Signs Your Membrane Roof Needs Attention
Watch for ponding water that doesn’t clear within 48 hours, visible blistering or lifting at the seams, staining on ceilings below the roof, and any cracking or brittleness in the membrane surface. Any of these signs is worth a professional inspection before the issue develops into a full leak.
Why Professional Installation Matters
A single ply membrane is only as good as its installation. Poorly welded joints, incorrect fixing patterns or badly detailed upstands are the most common causes of early roof failure, and these issues are often invisible until a leak develops. Membrane manufacturers also tie their long-term guarantees to installation by accredited contractors, so using an unqualified installer can affect the validity of that warranty from the outset.
Our team holds manufacturer accreditations across the leading single ply membrane brands, which means every installation is backed by both our own workmanship guarantee and the manufacturer’s material warranty. For property managers and architects specifying a roofing system, that combination gives a clear paper trail and genuine long-term protection for the building.
Why Choose The Solar Company
Trusted and reliable, we provide end-to-end solar solutions with guaranteed workmanship, full warranties, and expert support, ensuring your system is safe, efficient, and designed to last.
Long-lasting waterproof protection
Lightweight roofing solution
Fast installation process
Excellent UK weather resistance
Low maintenance requirements
Versatile application
Single Ply Membrane Roofing Cost Factors
The cost of a single ply membrane flat roof depends on several variables: the membrane type selected, the size and complexity of the roof, the amount of detailing around upstands and penetrations, insulation thickness, and the decision between a full strip-back and an overlay onto an existing structure. Access requirements also play a part, particularly on multi-storey commercial buildings where scaffolding or specialist access equipment adds to the overall project cost.
It’s worth weighing cost against long-term value rather than upfront price alone. A well-installed EPDM or PVC single ply system, backed by manufacturer accreditation, can last 25 years or more with minimal maintenance, which usually works out more cost-effective over the life of the roof than a cheaper system needing repair or replacement sooner. Our team provides a detailed, itemised quotation for every project so clients can see exactly what they’re paying for and why.
Why The Flat Roofing Company Stands Out
There are plenty of contractors offering single ply roofing membrane installation across the UK, so it’s fair to ask what sets one apart from another. Our installers hold manufacturer accreditation across the leading single ply membrane brands, including EPDM and PVC systems, so every project is backed by a genuine material warranty rather than just a workmanship guarantee.
We also offer full-service capability, covering everything from the initial survey and design through installation, insulation upgrades, ongoing maintenance and repairs, all handled by the same team rather than being passed between subcontractors. That continuity carries through our project history too: we’ve completed single ply membrane roofing projects for schools, warehouses, offices, retail units and residential properties across the UK, so whatever the building type, we’ve likely worked on something similar before.
Every quotation is clear and itemised, with no hidden costs, so clients understand exactly what’s included before work starts, and our teams cover commercial sites and domestic properties on a schedule that fits around how the building is used. The Flat Roofing Company has built its reputation on getting the detail right, because on a flat roof, the detail is usually where problems start.
What our customers say
We had a new build flat roof installed and the team were amazing from start to finish. Friendly, professional, and the roof looks perfect. Couldn’t recommend them more!
Sarah H., Bournemouth
Our garage roof was leaking for months. They came out quickly, replaced the felt and now it’s totally dry. Honest people and great workmanship.
Mike P., Poole
They installed a single ply membrane on our extension and I was really impressed with how tidy they left everything. Efficient, polite, and really know their stuff.
Lisa M., Dorset
We needed a flat roof on our commercial unit. The team were brilliant—kept us updated, finished on time, and the quality is top notch. Very happy with the service.
Raj S., Bournemouth
I wasn’t sure about replacing the felt on our old roof, but they explained everything clearly and the job was done perfectly. Friendly team, no fuss, highly recommended.
Joanne T., Poole
Had them work on our extension roof and I can’t believe the difference. So professional, great attention to detail, and finished exactly as promised. Would definitely use again.
Tom B., Dorset
Our new build flat roof needed a single ply system and they were spot on. Super knowledgeable, worked efficiently, and the roof looks flawless. Can’t fault them.
Emma L., Bournemouth
The team replaced the membrane on our commercial building and I was really impressed. On time, polite, and cleaned up afterwards. Finally a company you can trust.
Mark R., Poole
Had a tricky garage roof replacement and they handled it like pros. Friendly, skilled, and didn’t leave a mess. The quality of work is excellent.
Claire W., Dorset
We recently had a flat roof installed on an extension and the team fitted a skylight, it has made such a difference to our living space! They were professional and friendly throughout, and it looks fantastic!
James K., Bournemouth
We had a small green roof section added to our extension. It was such a good decision – it already looks beautiful! The team were approachable, knowledgeable, and it looks incredible. Couldn’t be happier!
Tony H., Bournemouth
Get in Touch With The Flat Roofing Company
If you’re planning a new single ply membrane roof, or need repairs or maintenance on an existing system, The Flat Roofing Company can provide a full survey and a clear, itemised quotation for your project. Our team works across Commercial Roofing and domestic projects, general Roof Waterproofing, and can talk through the right membrane and insulation specification for your building.
To arrange a site visit or request your free quotation, call our team on 01202 925951 or email info@theflatroofingcompany.com. We respond to every enquiry promptly and can usually arrange a survey within a few working days.
FREQUENTLY ASKED QUESTIONS
A correctly installed single ply membrane roof typically lasts between 25 and 35 years, depending on the material used and the level of ongoing maintenance. EPDM and high-quality PVC or Alwitra single ply membrane systems tend to sit at the longer end of that range when installed by an accredited contractor.
Neither material is universally “better”; they suit different situations. EPDM offers excellent flexibility and UV resistance at a lower cost, while PVC provides stronger chemical resistance and heat-welded seams, which can suit sites with industrial fumes, oils or extraction systems. The right choice depends on the building, its location and its intended use.
Book your free consultation
Address
Unit 5, Wessex Trade Centre,
Ringwood Rd, Poole
BH12 3PF
01202 925951
Speak directly with a flat roofing specialist