Flat roofing services
Domestic Flat Roofing
Whether it is a new extension, a leaking garage roof or a dormer that needs replacing, we deliver domestic flat roofs that look smart and stay dry. We work cleanly and respectfully around your home, protect your property throughout, and leave the site tidy every day.
Flat roofs for extensions and home improvements
A flat roof on a single-storey extension does a lot of work: it has to be warm, watertight, and tidy where it meets the house. We build extension roofs as warm-roof single ply systems with insulation to meet current Building Regulations, so the new room is comfortable to use all year and cheaper to heat.
We also integrate the things that make a flat roof feel like part of the home, from roof lanterns and flat rooflights that bring light into a kitchen-diner, to neat parapet and abutment detailing where the roof meets the existing brickwork.
Replacing a tired garage, porch or dormer roof
Many of the roofs we replace are old felt or asphalt on garages, porches, bay windows and dormers that have reached the end of their life. The signs are familiar: bubbling and splitting, water sitting in dips, or a stain spreading on a bedroom ceiling.
We strip the old covering, check and make good the deck, and fit a modern single ply membrane that will outlast the felt many times over, with the awkward junctions and upstands detailed properly so they do not leak.
Clean, considerate work around your home
A roof job should not turn your home upside down. We protect the areas we work around, manage waste responsibly with our own skips and clearance, and tidy up at the end of every day. Most domestic flat roofs are completed in a few days, and we keep you informed from the first visit to the final sign-off.
Why choose us
What you get with Sureseal
Extensions & new builds
Warm-roof single ply build-ups that meet current Building Regulations for insulation.
Garages & outbuildings
Durable replacements for tired felt or asphalt garage roofs at a sensible price.
Dormers & bays
Neat detailing around awkward junctions, upstands and abutments to the main roof.
Tidy & respectful
We protect your home, manage waste responsibly and clear up fully on completion.
Systems & materials
What we install and use
Single ply warm roof
Hot-air welded membrane over Building-Regulations insulation, the standard for extensions and replacements.
Liquid systems
Cold-applied PMMA or polyurethane for small, complex or heavily detailed roofs where a poured finish works best.
Rooflights & lanterns
Flat rooflights and roof lanterns set in and detailed so they are fully watertight.
Insulation to current regs
Insulation specified to meet the thermal requirements for a renewed or new flat roof.
Our process
What to expect
- 1
Free home visit
We measure up, talk through your options and explain what is causing any current problems.
- 2
Written quotation
A clear price with no surprises, including insulation, membrane and guarantee.
- 3
Installation
Most domestic roofs are completed in a few days, working cleanly around your household.
- 4
Guarantee
You receive a workmanship guarantee plus the manufacturer system guarantee.
Frequently asked questions
Do I need planning permission for a flat roof?
Most like-for-like flat roof replacements and small extensions fall under permitted development, but building regulations apply to the thermal performance. We are happy to advise on your specific project.
How much does a domestic flat roof cost?
It depends on size, access and the system specified. We give a fixed written quote after a free survey so you know exactly where you stand.
How long will the work take?
Most domestic flat roofs, such as an extension, garage or dormer, are completed within a few days, weather permitting.
Can you fit a roof lantern or rooflight?
Yes. We regularly install roof lanterns and flat rooflights, dressing and welding the membrane into the kerb for a watertight detail.
Will you remove the old roof?
Yes. We strip the old covering, dispose of waste responsibly and prepare the deck before installing the new roof.
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 →Single Ply Flat Roofing
Hot-air welded PVC & TPO membrane systems, the watertight, long-life choice for flat and low-pitch roofs.
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.