- Flat Roofs
Flat Roofs
Watertight flat roofing for homes across Hampshire, Dorset and Surrey. EPDM rubber, GRP fibreglass, liquid and felt systems. Fitted properly, guaranteed for decades, and never a leak we didn’t plan for.
Not All Flat Roofs Are Created Equal
A flat roof isn’t actually flat. It has a subtle fall built into it, around 1 in 40 to 1 in 80, to let rainwater drain off instead of sitting in puddles. When that fall is wrong, when the seams are poorly laid, or when the wrong material is chosen for the job, flat roofs develop the reputation they sometimes get: leaky, short-lived and constantly needing attention.
Done properly. With the right material, the right detailing around upstands and outlets, and a team that actually understands how water behaves. A flat roof will outlast most tiled roofs that get nailed on top of it. We’ve been fitting them for over twenty years across extensions, dormers, garages, porches, bay windows and outbuildings, and we’ll always tell you which system genuinely suits your project rather than defaulting to whichever one’s easiest for us.
Every flat roof we install comes with a 20-year workmanship guarantee, backed by our CORC insurance-backed guarantee scheme, plus the manufacturer’s own warranty on the material itself.
Flat Roof Systems We Install
GRP Fibreglass Roofing
Glass reinforced plastic. The same material used on boat hulls and commercial roofs. Laid in a liquid form over a plywood deck and cured into a single seamless surface with no joins, no seams and nothing to peel away. We use industry leading GRP systems from the likes of Cure It and Scott Bader Crystic, with a proper topcoat finish and matching trims. Typical manufacturer backed warranty up to 25 years, expected working life 30+.
EPDM Rubber Roofing
A single-sheet synthetic rubber membrane. Also known as rubber roofing. Bonded to the deck in one continuous piece so there are no seams to fail. Highly flexible, UV-stable and unaffected by the temperature swings that crack felt. Systems from manufacturers like Firestone RubberCover and ClassicBond come with manufacturer warranties of 20 years or more and a genuine 50-year expected life. An excellent choice for garage and extension roofs where long-term peace of mind is the priority.
Felt Roofing
Modern torch-on felt. A long way from the bitumen felt that gave the material its dated reputation. Laid in three layers (vapour barrier, reinforcement and a mineral-finished cap sheet), properly overlapped and torched at the seams, it remains one of the most proven and cost-effective flat roofing systems available. Best suited to budgets where GRP or EPDM isn't practical. We'll tell you honestly when it's the right call and when it isn't.
Liquid Roofing Systems
Cold-applied liquid waterproofing membranes. Brushed, rolled or spray-applied straight onto the existing substrate, curing into a fully bonded seamless coating. Ideal for awkward shapes, roofs with complex detailing, or situations where a hot-works system isn't safe. We use proven systems such as Kemperol, Polyroof and similar, with warranties typically 20-25 years depending on specification.
Flat Roof Replacement
When a flat roof is genuinely past saving. Multiple leaks, deteriorated decking, sagging timbers, end-of-life felt. A proper replacement is always cheaper in the long run than endless patches. We strip the old covering back, inspect and replace any damaged decking, and rebuild with your choice of EPDM, GRP, liquid or modern felt. With full insurance-backed warranty on the finished job.
Flat Roof Repairs
Leaks, splits, blisters, failed seams, bubbled felt, loose upstands, ponding water. We diagnose and repair the whole range. The tricky part with flat roofs is that the leak indoors rarely sits directly under the fault outside, so we take the time to track the actual cause rather than chasing the symptom. Repairs come with a written guarantee appropriate to the work carried out.
Fibreglass Roofing
Liquid Roofing Systems
Our Services
Speak to a Flat Roofing Specialist
GRP, EPDM, liquid or felt? The right answer depends on your roof, your budget and how long you need it to last. Book a free survey and we’ll walk you through the options. Honestly, with no hard sell.
Don't Let a Failing Flat Roof Become a Bigger Problem
The difference between a flat roof that leaks within five years and one that sees out 30+ years is almost entirely down to how it was fitted. We don’t cut corners on the prep, we don’t skimp on the detailing, and we always use the system that’s right for your specific roof. Not the one that’s right for our diary.
Get in touch for a free, no-obligation survey. We’ll take a proper look at the existing structure, explain your options in plain English, and give you a written quote with everything accounted for.
Three Layers of Protection on Every Flat Roof
A flat roof is a long-term investment. Here’s how yours is backed from the moment we finish the job:
20-Year Workmanship Guarantee
From us, in writing, on the day of completion. Covers the installation itself. Fixings, detailing, laps, upstands, outlets, the lot.
Insurance-Backed via CORC
Our Confederation of Roofing Contractors membership means the guarantee is underwritten, so if for any reason we couldn't honour it ourselves, the insurer steps in. Most flat-roof firms simply can't offer this level of cover.
Manufacturer Material Warranty
Whichever system you choose. GRP, EPDM, liquid or felt. The manufacturer warrants the material itself, typically for 20 to 25 years. Cure It, Firestone, ClassicBond, Kemperol, Polyroof and the major felt manufacturers all provide this independently.
F. A. Q
Frequently Asked Questions
The questions homeowners ask us most often about flat roofing. If yours isn’t here, ring us on 07304 092761. Always happy to talk through specifics.
There isn't a single best system. Only the best system for your particular roof. For most domestic flat roofs we'd generally point homeowners towards EPDM rubber (long life, seamless, good value) or GRP fibreglass (extremely durable, excellent for foot traffic). Liquid systems come into their own on awkward, complex roofs. Modern felt still has its place where budget is the deciding factor. We'll survey the roof first and recommend honestly. Not just default to whichever system we prefer.
Depends entirely on the material, the quality of installation and how exposed the roof is. As a rough guide: properly fitted EPDM should see 40-50+ years, GRP around 30 years, liquid systems 20-30 years, and modern torch-on felt 15-25 years. Cheap installations of any of the above can fail within five.
Yes, and for most homeowners with an ageing felt roof, that's exactly what we'd recommend. We strip the old felt back, inspect and replace any damaged decking, then install your chosen system fresh from the substrate up. Full new warranty, no compromise from laying one system over another.
We'll repair any flat roof regardless of who installed it originally. We'll always tell you honestly whether a repair is genuinely viable or whether you're throwing good money after bad. Sometimes a replacement works out significantly cheaper over five years than repeated patching.
Usually one of two things: the fall was wrong to begin with, or the structure has sagged over time. Small amounts of short-term ponding after heavy rain aren't necessarily a problem. Persistent, deep pools sitting for days absolutely are. They accelerate material breakdown and find their way through even pinhole-sized faults. Worth a free survey to diagnose properly.
It can. During a full replacement we can build in insulation to current Building Regulations standards as a "warm deck" or "inverted warm deck" construction, significantly improving the thermal performance of rooms beneath. For straight swaps of the covering only, no additional insulation is added unless you specifically ask for it. Happy to talk through the options at survey stage.
Yes. £10 million public liability cover on every job, backed by our CORC membership. A copy of the certificate can go out with your quote if you'd like to see it.
What We Use :
