BALCONY ROOF GARDENS & FLAT ROOFING IN PIMLICO SW1V
Across the Thomas Cubitt stucco terraces of Eccleston Square, Warwick Square, and St George’s Square, as well as the multi-storey townhouses and mansion blocks lining Lupus Street, Belgrave Road, and Tachbrook Street (SW1V), properties rely on first-floor porticos, rear closet-wing flat roofs, and high-level mansard crown decks. When aged mastic asphalt fractures or rotten timber decking traps standing water against brick upstands, damp penetrates rapidly into the reception rooms below. On our Pimlico balcony roof garden refurbishment pictured here, London Roofing Specialist acted as the appointed flat roofer—stripping the degraded timber decking and perished membrane right back to the bare structural joists to engineer a watertight overhaul.
Careful Deck Strip-Outs, C24 Joist Checks & Tapered Firrings
Working on interconnected SW1V terraces demands quiet, considerate site discipline. Once our operatives stripped and cleared the decayed decking, we inspected the exposed C24 timber joists for wet rot, fitted graduated timber firring strips to establish a positive 1:40 drainage gradient towards the rainwater outlets, and fixed 18mm WBP exterior-grade marine plywood decking to BS 6229 standards.
PART L WARM ROOFS, SIKA SINGLE-PLY & LIQUID TANKING IN SW1V
Upgrading the thermal performance of a flat roof above a heated living space in Pimlico eliminates cold bridging and winter condensation. Over a continuous foil-faced vapour control layer, our technicians bonded high-compressive rigid PIR thermal insulation boards before installing a hot-air welded Sika Sarnafil single-ply waterproofing membrane.
Sika Sarnafil & IKO Polymeric Single-Ply
Hot-air welded thermoplastic membranes offering 40-year BBA-certified longevity, high puncture resistance, and zero naked gas flames.
Cold-Applied Sika Liquid Plastics & Portico Tanking
Seamless, fibre-reinforced elastomeric resins brushed around classical stucco portico columns, French door thresholds, and cast-iron railings.
Vulcanised One-Piece & Fleece-Backed EPDM
Flame-free synthetic rubber sheets engineered for rear SW1V additions, mansard crowns, and dormer roofs.
Part L Tapered & Flat PIR Thermal Insulation
High-density thermal boards that cut household heating overheads and satisfy Westminster Building Control U-value targets.
Zero-Flame Waterproofing for Listed Pimlico Properties
We never bring hazardous bitumen gas torches near dry nineteenth-century roof timbers or sash window boxes. Every membrane we install in SW1V is either cold-applied or fused with calibrated hot-air welders, backed by a 10-year insurance-backed workmanship guarantee.
FLOATING TERRACE DECKING, SKYLIGHTS & 10-YEAR GUARANTEES
Once the single-ply waterproofing membrane on our Pimlico project was flood-tested and signed off, our craftsmen installed bespoke hardwood and composite roof terrace decking alongside architectural paving tiles. Crucially, all terrace bearers and support pedestals sit on protective rubber crumb isolation pads without a single screw penetrating the waterproof membrane below—allowing rainwater to drain freely beneath the walking surface while creating an elevated outdoor retreat.
Structural Load-Bearing Appraisals
Pre-start joist and masonry checks to verify safe dead-load capacities for planters, paving slabs, and timber decking.
150mm Waterproof Perimeter Upstands
Dressing single-ply and liquid membranes up parapet walls and skylight kerbs, sealed with stepped Code 5 lead counter-flashings.
Floating Pedestal Decking & Porcelain Tiles
Level, slip-resistant walking surfaces that conceal drainage channels and protect the underlying membrane from UV and foot-traffic wear.
10-Year Insurance-Backed Guarantees
Comprehensive workmanship cover alongside 15-to-25-year manufacturer membrane warranties across SW1V.
Frequently Asked Questions: Flat Roofer Pimlico SW1V
View our wider portfolio or call our central London office today for a free, no-obligation Pimlico flat roof survey: 020 7205 4557
Why is the front portico or rear balcony on my Pimlico townhouse leaking?
Stucco-fronted portico balconies and rear closet-wing terraces in SW1V traditionally rely on mastic asphalt or mineral felt that splits where iron balustrade stanchions and low French door sills meet the deck. We strip the cracked covering, dress a seamless Sika liquid or single-ply membrane continuously around every railing post and threshold upstand, and float new decking or tiles above the waterproof layer.
Can you replace a flat roof for a Share of Freehold mansion block in Pimlico?
Yes. We work closely with SW1V resident management companies and block surveyors on Section 20 major works, providing core-sample condition reports, Westminster scaffold licences, and 20-to-25-year Sika or Garland manufacturer warranties.
