Flat roofing services
Single Ply Flat Roofing
Single ply membrane is the modern standard for flat roofing. A single, hot-air welded waterproof sheet means no joints to fail and no torch-on flame on your property. We have installed single ply since 1995 and hold approved-installer training with the leading manufacturers, including as an award-winning Renolit installer, so every roof is fitted to specification and backed by a genuine manufacturer guarantee.
What is single ply membrane roofing?
Single ply is a flexible waterproofing membrane laid in a single layer, rather than the multiple layers of traditional built-up felt. The sheets are rolled out across the roof and the overlaps are hot-air welded together, fusing them into one continuous skin with no glued laps to peel and no naked flame in the process.
The two main types are PVC and TPO. Both are proven, long-life thermoplastics; PVC has a long track record and excellent flexibility and chemical resistance, while TPO is valued for its environmental profile. We specify whichever suits your roof, its detailing and its budget, and explain the choice at the survey.
Why single ply outperforms felt and asphalt
Older felt and asphalt roofs rely on multiple layers and, often, a naked flame to install. They have many more joints, they go brittle and crack in cold weather, and they are heavy. Single ply has far fewer joints, every one of them welded, stays flexible in the cold, and is light enough to suit most existing decks.
The result is a roof with a realistic service life of 25 to 35 years, carrying a manufacturer guarantee of 20 years or more, installed without bringing a flame onto an occupied home, school or commercial building.
Warm roof build-up and detailing
A modern single ply roof is more than just the membrane. We build it up as a warm roof: a vapour control layer, high-performance insulation to meet current Building Regulations, and the membrane on top, with the falls set so water clears to the outlets rather than ponding.
The detailing is where roofs are won or lost. Upstands, kerbs, outlets, rooflights and abutments are all dressed and welded so there is no weak point for water to find. It is slow, careful work, and it is exactly what a specialist installer is for.
Why choose us
What you get with Sureseal
Manufacturer-approved systems
Installed using Renolit, Sika, Protan and Fatra membranes, fitted to spec for valid long-term guarantees.
Hot-air welded seams
Seams are welded, not glued, into one continuous waterproof skin, so there are no joints to lift or leak.
20-year-plus guarantees
Single ply membranes carry lengthy manufacturer guarantees and a realistic service life well beyond that.
No naked flame
A safer hot-air welded process, ideal for occupied homes, schools and commercial buildings.
Systems & materials
What we install and use
Renolit single ply
We are an award-winning Renolit installer, fitting their PVC membrane systems to manufacturer specification.
Sika, Protan & Fatra
Approved-installer systems from the leading single ply manufacturers, specified to suit your roof and budget.
PVC and TPO membranes
Both proven thermoplastics, hot-air welded into a seamless skin, in a range of colours including grey, anthracite and lead.
Warm roof insulation
Building-Regulations insulation with tapered schemes to create falls and clear standing water.
Our process
What to expect
- 1
Free roof survey
We assess the deck, falls, drainage and detailing, then recommend the right membrane and build-up.
- 2
Clear written quote
A fixed, itemised quotation with the system, insulation spec and guarantee set out in plain English.
- 3
Strip & prepare
We remove the old covering, make good the deck and install insulation and any new falls required.
- 4
Membrane installation
The single ply membrane is laid, mechanically fixed or adhered, and all seams hot-air welded.
- 5
Detailing & sign-off
Upstands, outlets and trims are dressed in, the roof is inspected, and your guarantee is issued.
Frequently asked questions
How long does a single ply flat roof last?
A correctly installed single ply membrane typically carries a 20 to 25 year manufacturer guarantee and commonly lasts 25 to 35 years with minimal maintenance.
What is the difference between PVC and TPO?
Both are welded thermoplastic membranes. PVC has a long, proven track record and excellent flexibility; TPO is valued for its environmental profile. We specify whichever suits your roof at the survey.
Can you install single ply over my existing roof?
Sometimes, if the deck and insulation are sound and dry. We confirm at the free survey whether an overlay is suitable or a strip-and-refit is the better long-term option.
What colours does the membrane come in?
Most ranges offer grey, anthracite, white, lead and other shades, so the roof can be matched to the building or neighbouring properties.
Is single ply suitable for a green roof or a balcony?
Yes. Several systems are designed to sit beneath green roof build-ups, and we can specify walkway or trafficable finishes for balconies and terraces.
Can you fit single ply in winter?
Yes. Hot-air welding works in cold weather and the membrane does not rely on warm, dry conditions to cure. We avoid laying in heavy rain or snow for quality reasons.
Other flat roofing services
Commercial Flat Roofing
Large-area single ply roofing for warehouses, units and public buildings. Phased, certified, minimal disruption.
Learn more →Roof Maintenance
Planned maintenance, surveys and minor repairs that protect your roof and keep manufacturer guarantees valid.
Learn more →Domestic Flat Roofing
Flat roofs for extensions, dormers, garages and porches, warm, watertight and finished to a high standard.
Learn more →New Roofs & Replacement
Full strip-and-refit replacements and brand-new flat roofs, built up as warm roofs and guaranteed for the long term.
Learn more →Flat Roof Repairs
Leak detection and lasting repairs, plus honest advice on whether a repair or a new roof is the smarter spend.
Learn more →Electronic Leak Detection
We test roofs electronically to pinpoint leaks and prove integrity, then give you a full report with every breach located and photographed.
Learn more →Liquid Roofing
Cold-applied, seamless PMMA and polyurethane waterproofing for balconies, complex roofs and heavy detailing.
Learn more →Get a free, no-obligation flat roofing quote
Speak to a single ply specialist today. We survey your roof, explain your options and put it all in writing, with no pressure.