- TriRoof Roofing Systems
POLYURETHANE WATERPROOFING ROOF SYSTEM
TriRoof Polyurethane Waterproofing Roof System is a one component; moisture triggered elastomeric urethane coating, recognized for its excellent strength and long lasting durability.
The substrate is first covered with a layer of Polyurethane Roofing Basecoat followed by a layer of matting. It’s then finished with our Polyurethane Roofing Topcoat which is Dark Grey in colour.
Please note, asphalt roof surfaces do not require primer. However, primer must be used on concrete substrates. We offer a range of Primers depending on the substrate e.g. Concrete, GRP or Metal.
Our system is designed for use in applications where a seamless waterproof system is required on structurally sound roof areas. It is recommended that the system is applied at +5 to +35°C.
Key Features
✓ Can be applied to existing roofs (no need to strip back)
✓ Easy by-hand application
✓ Short cure times allowing product to be over-coated quickly
✓ Will work to any size roof
✓ Outstanding waterproofing properties
✓ Provides a seamless finish – no joints will leak
✓ Easy to maintain
✓ Long term protection
✓ Comprehensive technical support
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PU Roofing Systems: A Leading Solution for Flat Roof Waterproofing
Polyurethane (PU) roofing systems have become one of the most effective solutions for achieving long-term, seamless waterproofing for flat roofs. Known for their exceptional flexibility, durability, and resistance to environmental stresses, PU membranes deliver robust and high-performance protection for both new builds and refurbishment projects.
Offering outstanding adhesion and a fully bonded finish, PU roofing systems ensure superior flat roof waterproofing with minimal maintenance — making them a trusted choice across residential, commercial, and industrial applications.
What is a PU Roofing System?
A polyurethane (PU) roofing system is a liquid-applied waterproofing solution that cures to form a highly elastic, seamless membrane. Once fully cured, it creates a tough, durable, and watertight surface that adheres directly to the substrate.
Originally developed for challenging industrial environments, PU systems are now widely used in construction thanks to their outstanding ability to withstand ponding water, extreme temperatures, UV exposure, and structural movement — key challenges in waterproofing for flat roofs.
Why PU Roofing is Ideal for Flat Roofs
Flat roofs are especially vulnerable to water ingress, weathering, and mechanical stresses. A PU roofing solution addresses these challenges with the following key advantages:
1. Seamless, Fully Bonded Waterproofing
Liquid application eliminates joints, seams, and welds — the most common sources of flat roof leaks — creating a continuous, durable waterproof layer that easily manages standing water.
2. Exceptional Flexibility and Crack Bridging
PU membranes retain high elasticity even after curing, allowing them to accommodate thermal movement, structural shifts, and minor cracks without compromising waterproofing performance.
3. Long-Term Durability
Resistant to UV degradation, chemical exposure, and abrasion, polyurethane waterproofing systems maintain their integrity for decades, providing lasting protection with minimal upkeep.
4. Versatile Application
PU systems can be installed over a wide range of surfaces, including concrete, timber, metal, asphalt, and existing roof membranes — making them ideal for both new projects and overlays.
5. Rapid Installation and Curing
Quick curing times and easy application by roller, brush, or spray reduce on-site disruption and enable faster project completion, even on complex or detailed roof designs.
Common Applications for PU Roofing Systems
Polyurethane waterproofing systems are highly versatile and suitable for a wide range of flat and low-pitched roofing projects, including:
- Commercial and industrial flat roofs
- Residential homes and extensions
- Walkways, terraces, and balconies
- Green roofs and podium decks
- Refurbishment of aging flat roofs
Wherever reliable, seamless waterproofing for flat roofs is needed, PU systems provide a robust, flexible solution that performs in the most demanding environments.
Important Considerations When Using PU Roofing Systems
While polyurethane waterproofing offers significant advantages, it’s important to keep the following in mind for optimal results:
- Surface Preparation: Substrates must be clean, dry, and structurally sound to achieve maximum adhesion and performance.
- Weather Conditions: PU systems generally require dry conditions for successful application. Wet or damp substrates can affect curing and membrane integrity.
Professional Installation: For the best waterproofing performance and maximum lifespan, installation should be carried out by experienced contractors familiar with liquid-applied membrane techniques.
PU Roofing Systems: The Smart Choice for Waterproofing Flat Roofs
Polyurethane waterproofing systems offer an unbeatable combination of strength, flexibility, and seamless protection. Their ability to bond securely to diverse substrates and perform under extreme conditions makes PU systems a leading choice for waterproofing flat roofs — from residential projects to complex commercial structures.
If you’re seeking a high-quality solution that combines ease of application with proven durability, a PU roofing system offers lasting peace of mind and reliable flat roof protection.