IKO SINGLE-PLY & WARM ROOF UPGRADES ACROSS TW9 & TW10
Replacing an ageing felt roof on a period rear extension or detached family home in Richmond upon Thames is an opportunity to transform both the thermal performance and appearance of your living space. On our recent residential refurbishment in Richmond, London Roofing Specialist stripped away perished bitumen felt to install a complete IKO single-ply flat roof system paired with 130mm rigid thermal insulation and custom architectural rooflights.
Timber Deck Preparation, Vapour Barriers & Drainage Falls
Before any waterproofing layer is fitted, our surveyors inspect the exposed timber joists and structural decking for deflection or damp decay. We re-level the substrate using tapered firring pieces so rainwater clears cleanly into the perimeter gutters, lay a continuous foil-faced vapour control barrier, and mechanically fix the insulation and IKO single-ply membrane in strict accordance with UK Building Regulations.
130MM THERMAL INSULATION & ARCHITECTURAL SKYLIGHTS
Uninsulated flat roofs over kitchen-diners and garden rooms lose heat rapidly in winter and overheat during summer. By building a 130mm rigid PIR warm roof assembly above the structural deck, we keep the roof timbers at a stable ambient temperature, eliminate interstitial condensation, and bring TW9 and TW10 homes into full compliance with Part L energy standards.
IKO & Sika Sarnafil Single-Ply Systems
Hot-air welded thermoplastic membranes offering crisp detailing, high UV reflectance, and complete resistance to standing water.
Frameless & Lantern Skylight Integration
Precision timber kerb construction and welded membrane upstands around structural glass rooflights to flood interiors with daylight.
One-Piece EPDM Rubber & Liquid Coatings
Elastomeric rubber membranes and cold-applied liquid polyurethanes for bay window tops, garages, and complex parapet junctions.
Insulated Roof Terrace & Balcony Overlays
Heavy-duty waterproofing assemblies designed to support composite decking or pedestal-mounted porcelain paving slabs.
Weathered Upstand Flashing Around Structural Glazing
Skylights and roof lanterns are prime leak points if flashed with basic silicone or poorly lapped felt. Our NFRC-accredited installers form insulated timber upstands and hot-air weld bespoke single-ply collars and Code 5 lead apron flashings directly around every glazing frame for a permanent, watertight seal.
HEAT-WELDED SEAMS & 10-YEAR INSURED GUARANTEES
Torch-on bitumen systems rely on naked flames that pose a fire risk on period timber roofs. By contrast, our IKO and Sika single-ply membranes are fused using temperature-controlled hot-air welding equipment, creating a monolithic bond stronger than the sheet itself. Every completed flat roof in Richmond upon Thames carries a 10-year insurance-backed workmanship guarantee alongside manufacturer material warranties.
Frequently Asked Questions: Flat Roofers Richmond
Can you install glass skylights when replacing an existing flat roof in Richmond?
Yes. Stripping the old roof covering down to the joists is the ideal time to trim and double-up the structural timber rafters to form openings for flat glass rooflights or pitched lanterns. We handle the structural timber framing, 130mm warm roof insulation, and welded perimeter flashing as one seamless package.
How long does a single-ply flat roof last compared to traditional felt?
While standard mineral felt typically degrades and blisters within 10 to 15 years under UV exposure, an engineered IKO or Sika Sarnafil single-ply system remains flexible across all seasons and delivers an expected service life of 35 to 40 years with virtually zero maintenance.
