Flat roofing questions, answered.

Our HQ is on Newsam Road, Kilnhurst, S64 5UL — between Rotherham and Mexborough. Domestic work: all of South Yorkshire (S, DN and surrounding postcodes). Commercial work: we travel further for the right project — we've worked as far as Oxford and the North East.

Genuinely local. Family-run, every roofer on our team lives within 20 minutes of the yard, and Chris (the name on most of our Google reviews) is the owner. You can knock on the door if you're passing.

For South Yorkshire postcodes: typically 2–5 working days for non-urgent surveys, often same-day or next-day for active leaks.

£10m public liability, £10m employer's liability. Certificates provided to clients, QSs or insurers at contract stage on request.

Yes. Our case studies include the Google Data Centre at Waltham Cross, the Defence Rehabilitation Centre opened by The Queen, an award-winning project at New College Oxford, and large-scale manufacturing work at Be Modern, Jarrow. For domestic references closer to home — see our location pages with recent jobs by town.

Rough guide: £90/m² for single ply replacement. Scaffolding adds £1,000–£2,000. Insulation upgrade is +£40/m². So a typical 30 m² extension is £3,500–£5,000 all in. Repairs from £250. Use the estimator for an instant range tailored to your roof.

£1,800–£2,500 for a typical 16–22 m² single garage roof, including strip-out of the old roof. Larger or trickier-access garages can be more.

Most patch repairs are £250–£500. We'll always tell you honestly whether repair is the right call or whether replacement makes more sense.

Yes — site surveys and written quotes are free, with no obligation. Estimator quick-prices online are also free and instant.

Our written quote post-survey is fixed. The only thing that ever changes is when we find unforeseen issues stripping out (e.g. rotten deck, asbestos in old felt) — and we'll quote those separately before doing the work, never afterwards.

Modern single ply membranes are tested to last 40+ years in UK conditions. Most carry manufacturer-backed warranties of 20–25 years (we offer 20 as standard). With light periodic maintenance, the membrane often outlasts the building.

GRP is rigid, glued in place, and prone to cracking — typically failing within 10–15 years. Single ply is flexible, with heat-welded seams. Better fire rating, better lifespan, better warranty. Full comparison here.

Felt was standard for decades but degrades under UV and tears with movement. Single ply lasts 3–4× as long, looks cleaner, and stays watertight at parapets and around penetrations where felt fails first.

We're certified across 7 manufacturer systems: Sika (Sikaplan/Sarnafil), Protan, IKO (Armourplan), Icopal Monoplan, Fatra (Fatrafol), Alwitra, Renolit (Alkorplan). Most contractors are tied to one — we pick the right system for the roof, not the only one we're allowed to fit.

Yes — most systems we install carry Broof(t4), the highest external fire rating in the UK. We can also specify FM Global approved systems for commercial projects requiring insurance-grade fire performance.

Repair if the roof is under ~12 years old, damage is localised, and the rest of the roof is sound. Replace if the roof is 15+ years old, multiple leaks across different areas, blistered/brittle membrane, or you're paying for repairs every year.

Domestic (20–40 m²): 2–4 days. House extension: 2–4 days typically. Commercial work is scheduled and phased with you in advance.

Only if the roof is on a first floor or higher. Single-storey extensions and most garages can be done from ground or a tower scaffold (much cheaper).

Yes — and we strongly recommend it. Building Regs require U-value 0.18 W/m²K on roof replacements. We add PIR insulation board to hit spec (+£40/m²) and your heating bills drop noticeably.

We strip it, bag it, and take it off site. You don't need to provide a skip unless you want one.

On a roof with life left in it — yes. We use the same single-ply patches and welded seams we'd use on a new roof. A proper repair often outlasts the rest of the roof.

£250–£600 depending on roof size, access, and report depth. Pre-purchase surveys at the lower end, commercial multi-roof surveys at the higher end.

Single ply, EPDM, GRP and felt are all electrical insulators, but water and the deck below conduct electricity. We place a low-voltage electrode on the roof and scan the surface — any breach completes a circuit and we know exactly where the leak is, to sub-centimetre accuracy.

Electronic leak testing + a full written report: £450–£950. Repair costs quoted separately based on what we find.

No. Very low voltage, only needs a damp surface. The roof is left in exactly the condition we found it (apart from now knowing where the holes are).

Yes if you want — but you're under no obligation to use us for the work. Many clients use our report and get other contractors to bid against our numbers.

20-year manufacturer-backed warranty on the membrane as standard (up to 25 years on commercial). 10-year workmanship guarantee from us. Both transferable if you sell the property.

Yes — almost every manufacturer warranty requires periodic inspection and drain clearance. If you don't maintain the roof at least annually, you can void the warranty when you need it most. See our maintenance plans.

Domestic: once a year. Commercial: twice a year (Spring and Autumn). Heavily trafficked or critical roofs more often.

Yes — most of our maintenance contracts are on roofs fitted by other contractors. We assess condition at the first visit and quote accordingly.

No. Pay per visit, cancel any time.

Yes — commercial is a major part of what we do. Factories, warehouses, schools, healthcare, retail, public sector. See our commercial page for full detail.

We're certified installers for all systems we offer — most of which carry BBA, BRE and / or FM Global approvals. We supply documentation of specific approvals at quote stage so your QS or insurer can verify before sign-off.

Yes. Project-specific RAMS, COSHH assessments, fire risk method statements, manufacturer specs and warranty terms issued at award stage. ISO 9001 / SafeContractor / CHAS certificates on request.

Yes — most of our commercial work is phased around live trading or production. Weekend, evening, or shutdown work as required, with daily reports.

Yes — that's a growing part of our book. We integrate with your CAFM workflow (Concerto, Concept Evolution, Maximo, FSI, MRI, etc.), respond to tickets, and feed back updates in the format you need.

Easiest: use the 60-second estimator for an instant range, then we'll come out and confirm with a firm written quote. Or call 07807 815181, or use the contact form.

Yes — every quote starts with a free site visit. We won't price work we haven't seen with our own eyes.

Domestic: usually within 24 hours. Commercial / tender work: within 5 working days.

Most flat roof replacements don't need planning permission (permitted development), but Building Regs apply. We handle the Building Regs side as standard. For listed buildings or conservation areas, we'll flag it and advise.

Call us. Honestly, a 2-minute chat usually tells both of us whether it's a repair, a replacement, a survey, or a leak detection job. No script, no hard sell.