High-Performance Flat Roof Systems for Commercial and Industrial Buildings
At DH Roofing Ltd, we specialise in the design and installation of high-performance flat roof systems for large-scale commercial, industrial, and public-sector projects.
Our fully trained operatives deliver manufacturer-approved installations using systems from Westwood, Sika, Garland, Axter, Proteus, Polyroof, Alumasc, and Langley, ensuring every roof achieves the required NHBC and BS 6229 standards for waterproofing integrity, thermal performance, and durability.
Each project is managed by experienced site supervisors with full quality-assurance documentation, RAMS, and digital photographic records provided upon completion.
Flat Roof
Liquid Waterproofing Systems
Cold-applied PMMA and PU liquid systems offer seamless, fully bonded waterproofing ideal for refurbishment overlays, balconies, walkways and podium decks.
These rapid-cure technologies eliminate hot works, reduce programme times, and provide complex detailing around penetrations without joints or laps.
Key Benefits
- Rapid installation with walk-on times as low as 30 minutes.
- Excellent adhesion to most substrates including bitumen, concrete, and timber.
- Ideal for occupied buildings where odour or flame restrictions apply.
- Warranties available for 20 – 30 years depending on specification.
Typical Manufacturers
Westwood – Wecryl System
Sika – Sikalastic Range
Garland – Dura Coat
Axter – Starcoat
Proteus – Pro System
Polyroof – Protec & 185 Systems
Flat Roof
Balcony & Walkway Systems
Durable, trafficable waterproofing for balconies, walkways, and podium areas.
Designed with long-term performance in mind, these systems can also accommodate common detailing requirements such as upstands, door thresholds, drainage outlets, and movement joints—helping to reduce risk at critical interfaces.
- UV-stable coloured finishes to match project design.
- Anti-slip aggregate finishes for safe access.
- Tile effect for enhanced aesthetics.
- Compatible with PMMA and PU liquid bases for seamless transitions.
Flat Roof
Reinforced Bituminous Membrane (RBM) Systems
Traditional multi-layer felt systems remain a proven solution for large-area flat roofs requiring robust tried and tested waterproofing.
DH Roofing Ltd install RBM systems from Garland, Axter, Proteus, Alumasc, and Langley.
Key Benefits
- Two- or three-layer torch-on or self-adhesive build-ups.
- Integrated vapour control and insulation layers for warm-roof compliance.
- Installed in accordance with Safe2Torch, Brooft4 and NHBC Technical Standards 7.1 & 7.2.
- Warranties up to 30 years, dependent on specification and manufacturer.
Flat Roof
Green Roof Systems
Sustainable green roofs combine waterproofing with planting and drainage layers to deliver environmental and thermal benefits.
These build-ups can also support wider project goals such as attenuation of rainwater run-off, improved biodiversity, and reduced heat gain at roof level, while enhancing visual amenity for residents and occupants.
- Extensive lightweight sedum or wildflower systems.
- Intensive landscaped roof gardens for podiums and communal terraces.
- Compatible with both liquid and RBM waterproofing systems.
- Installed in line with FLL Guidelines and BS 8616:2019.
Flat Roof
Cut-to-Falls & Insulation Systems
Precision-designed tapered insulation schemes improve drainage and thermal efficiency.
Each scheme is set out to suit the roof geometry and drainage strategy, helping to eliminate ponding while maintaining consistent insulation thicknesses at critical junctions.
- EPS, PIR and mineral-fibre systems tailored to outlet positions.
- Full condensation-risk and thermal-bridging analysis provided.
- Ensures compliance with Part L Building Regulations.
View Our Flat Roof Projects
Take a look at our latest flat roof projects to see how we bring technical expertise and industry-leading standards to every flat roofing scheme. From new builds to refurbishments, our work showcases the craftsmanship and reliability that clients across the UK depend on.