COMMERCIAL FLAT ROOF REFURBISHMENTS & WARM ROOFS IN LONDON
Refurbishing an expansive commercial flat roof on an occupied London office block, industrial warehouse, transport depot, school, or mansion block demands rigorous engineering and live-site management. On our commercial flat roof overhaul pictured here, London Roofing Specialist acted as the principal commercial flat roofer—stripping the failed waterproofing down to the structural substrate to install a high-compressive 130mm IKO Enertherm PIR warm roof assembly topped with a mechanically fastened and hot-air welded IKO Armourplan PSG single-ply PVC membrane.
130mm Enertherm PIR Insulation & IKO Armourplan PSG Single-Ply
Standard domestic roofing specifications fail rapidly under the thermal movement, wind uplift, and foot-traffic loads of a large commercial span. Over a continuous foil-faced vapour control layer, our operatives laid 130mm of foil-faced Enertherm PIR insulation boards to eliminate cold bridging and bring the building into full Part L thermal compliance (achieving U-values of 0.18 W/m²K or better). We then fused IKO Armourplan PSG—a glass-fibre and polyester scrim-reinforced PVC membrane—using calibrated Leister hot-air welders for a flame-free, 35-to-40-year BBA-certified weather seal.
Explore our domestic and commercial membrane specifications at Flat Roofer London.
SINGLE-PLY, GARLAND SBS FELT & LIQUID PLANT-DECK SYSTEMS
Because London Roofing Specialist holds approved contractor status with the UK’s and Europe’s foremost commercial membrane manufacturers, we specify the exact waterproofing build-up suited to your building’s deck type, plant layout, and insurance requirements.
Core-Sample Moisture Mapping & Tapered Falls
Non-destructive moisture probes and core sampling prior to tender, paired with tapered insulation schemes that establish a positive 1:40 drainage fall under BS 6229.
Sika Sarnafil & IKO Armourplan Single-Ply
Hot-air welded PVC and FPO/TPE thermoplastic membranes offering fast installation, high solar reflectance, and zero naked gas flames on site.
Garland UK & SikaBit Pro Multi-Layer SBS Felt
Heavy-duty, polymer-modified bituminous systems exceeding 8mm in thickness for high-traffic plant decks, backed by up to 30-year Single-Point Guarantees.
Cold-Applied Sika Liquid Plastics (Sikalastic & PMMA)
Seamless, fibre-reinforced elastomeric resins brushed around complex HVAC chiller plinths, ductwork stanchions, cable trays, and corroded metal or asbestos-cement roofs.
Commercial Skylight Domes & Continuous Rooflights
Thermally broken polycarbonate domes, structural glass lanterns, and smoke-vent upstands weathered into the primary roof membrane.
Zero-Flame BROOF(t4) Compliance & Live-Business Continuity
Commercial property insurers across London increasingly prohibit naked bitumen gas torches. Every single-ply, cold-applied liquid, and flame-free felt system we install achieves unrestricted BROOF(t4) external fire designation under BS EN 13501-5, phased in watertight daily sections so your staff, tenants, or trading operations below are never disrupted.
NFRC ACCREDITED CONTRACTORS, SECTION 20 & 25-YEAR WARRANTIES
Appointing an NFRC-accredited commercial flat roofer in London protects freeholders, chartered surveyors, and facilities directors from split-liability disputes. Every registered commercial roof installation we deliver is audited on site by Sika, IKO Polymeric, or Garland UK technical field engineers at key build stages prior to final sign-off—unlocking 15-to-30-year manufacturer material and single-point warranties alongside our 10-year insurance-backed workmanship guarantee and £10m public liability insurance.
Call our Kensington commercial surveying team today on 020 7205 4557 to book a free core-sample roof inspection and itemised tender quotation.
Frequently Asked Questions: Commercial Flat Roofer London
Can you replace our commercial flat roof while our office, warehouse, or retail unit remains open?
Yes. We schedule material crane lifts outside peak business hours, erect alarmed perimeter scaffolding with full pavement protection, and strip and weather-seal the roof in phased daily bays so your building remains 100% watertight and operational throughout the contract.
Do you provide core-sample reports and specifications for RICS surveyors and Section 20 leasehold tenders?
Yes. Working alongside Sika, IKO Polymeric, and Garland UK technical managers, we supply full photographic core-sample condition surveys, U-value interstitial condensation calculations, wind-uplift calculations, and manufacturer stage-inspection sign-off certificates for RICS surveyors and Section 20 mansion block consultations.
More information on Flat Roofer London.
