JW Flat Roofing Waterproofing Solutions
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Commercial
flat-roof
specialists.

Factories, schools, warehouses, retail. All flat roofing and waterproofing systems — single ply, GRP, bituminous, PU & PMMA liquid. 40 years on commercial flat roofs, insurance-grade reports, planned maintenance, out-of-hours installs to keep your operation running.

Factories & industrial Schools & academies Warehouses & logistics Retail & hospitality Healthcare facilities Offices & mixed-use
Commercial systems

Built for spans, signed off for warranty.

All flat roofing and waterproofing systems — single ply (incl. EPDM), GRP, bituminous, hot-melt, PU & PMMA liquid. Specified to the building, signed off by a manufacturer-approved hand.

Single ply membranes

EPDM, TPO and PVC for large-span industrial roofs. Heat-welded, mechanically fastened or fully adhered. EPDM sheets up to 30m × 60m — almost no seams, almost no fail points. 20–50 year warranties.

PU & PMMA liquid systems

Cold-applied liquid waterproofing — polyurethane and PMMA resins. Fully bonded, seamless, fast cure. Ideal for complex detail work, parapets, plant areas and overlay refurbishments where strip-out isn't viable.

GRP commercial

Single-storey commercial extensions, plant rooms, lift over-runs, parapet caps. Seamless cold-applied resin and topcoat. 20-year material guarantee. Heavy-traffic walkways for plant access.

Bituminous & hot-melt

The oldest membrane system, still hugely popular. Single-layer through full built-up with insulation. Hot-melt for inverted podium decks, balconies and terraces over occupied space. 10–30 year warranty schemes.

Planned maintenance

Annual drone inspections, gutter clears, seam checks, outlet flushes. Catch the £200 fix before it becomes a £20,000 strip-out. Rolling contracts available.

Insurance-grade drone surveys

Full thermal & visual drone reports for insurers, landlords, schedules of dilapidation. Documented evidence, dated, geo-tagged — everything your broker wants to see.

Out-of-hours installs

Nights and weekends to keep retail trading, schools open and warehouses moving. We schedule round your operation — not the other way round.

Asbestos-aware

Older industrial roofs are full of surprises. HSE-compliant, asbestos-aware crews. We survey, isolate, and work to the management plan — no shortcuts, no contamination.

Manufacturer-approved

Certified installer for major commercial systems — Bauder, Sika, Mapei, Permaroof. Means manufacturer-backed warranties, not contractor IOUs.

Also: cool roof installations · BREEAM-compliant build-ups · green/biodiverse roofs · solar PV pre-installs · firings & falls · roof-edge fall protection

Why facilities managers call me

When the roof's on the schedule, it gets done right.

No subcontractor daisy-chains. No "we'll get a man out next month." I'm the surveyor, the installer, and the warranty point of contact — one number, one job, one signed-off result. Operating across Dorset, Hampshire and Wiltshire on commercial flat roofs since 1984.

JW
JW Flat Roofing
Owner-operated. 40 years on commercial flat roofs.

25-year manufacturer warranties

Bauder, Sika, Mapei, Permaroof — proper certified-installer warranties on every commercial system. Backed by the manufacturer, not just the contractor.

Out-of-hours scheduling

Strip and re-roof over weekends, evenings or shutdown weeks. Production keeps moving, retail keeps trading, schools stay open.

Insurance-ready paperwork

Full drone reports, RAMS, public liability £5m, employer's liability £10m. Everything your insurer, broker or schedule-of-dilapidations needs.

Fixed-price written quotes

Drone survey, fixed quote in writing, no provisional sums or "subject to opening up". You know the number before the order goes in.

How it works

Four steps. Production keeps moving.

01

Site enquiry

Call, email or drop the form. I'll respond the same working day with availability and next steps.

02

Drone survey & report

Booked within the week. Full visual + thermal report, written quote, system recommendation, warranty schedule.

03

Schedule round you

Phased works, out-of-hours, shutdown weeks — whatever keeps the operation running. RAMS submitted, dates locked.

04

Sign-off & warranty

Manufacturer-issued warranty docs, full photographic record, post-install drone flythrough. Site left spotless.

Domestic job?

House extension, dormer or garage roof.

Residential flat roofing is on a different page — same hands, same warranty, different scope.

See residential
Site enquiries

Tell me about the building.

Drone survey, written quote, system recommendation. Most commercial sites surveyed within the week.

Phone
07584 469397
Or call
07884 457324
Coverage
Dorset · Hampshire · Wiltshire
Insurance
£5m PL · £10m EL · RAMS supplied

Most commercial enquiries get a survey date within 48 hours. Prefer to chat? Call direct.