Choosing the best coating for a flat roof in the UK depends on what matters most to you, such as cost, durability, appearance, or speed of installation. Each system has its advantages.

Because no two roofs are the same, there’s rarely a one size fits all answer. Climate exposure, roof structure, and project timescales all play a role in determining which coating performs best.

Why Liquid Applied Systems Are So Popular

Liquid applied waterproofing has become a leading choice for UK flat roofs. It delivers a seamless, flexible, and highly weather resistant membrane that adheres to most substrates.

The benefits include:

• Cold application: No flames or hot works required.
• Quick curing: Many systems can be installed in a single day.
• Easy detailing: Perfect for complex roof shapes or verticals.
• Proven durability: Resistant to ponding water and UV degradation.

At SRS Roof Systems, we supply a complete range of liquid coatings suitable for domestic, commercial, and industrial applications. Each system is backed by expert technical support and nationwide delivery.

SRS Perma-Flex – Cold Applied Liquid Waterproofing

Perma-Flex offers fast drying, single component protection with rapid curing in just one coat. Using advanced aliphatic polyurethane, it requires no extra UV protection or additives, cutting installation time without compromising on performance.

Ultra Flex – Advanced Flat Roof Waterproofing

A fully reinforced polyurethane system that cures on contact with moisture. Ultra Flex provides a long lasting, totally seamless finish ideal for both refurbishment and new build projects. It combines strength with flexibility, delivering exceptional crack bridging performance even under movement or stress.

Desmopol – A High-Performance Flat Roof System

A pure polyurethane elastomeric membrane applied in a single layer. With BBA and ETA certification, Desmopol provides outstanding adhesion, elasticity, and a 25+ year service life, making it ideal for professional contractors.

Aquapol – Fast Acting Liquid Roofing System

When water ingress needs urgent attention, Aquapol provides instant waterproofing, even in wet conditions. It bonds directly to damp surfaces, bridges cracks, and offers long term protection for flat roof repairs and maintenance.

Which Roof Coating Is Right for You?

There’s no single “best” coating for every roof, but there is a right one for each project.

Whether you prioritise longevity, speed of installation, or appearance, the SRS team can advise on the most suitable product and application method.

If you’d like help choosing, our experts are happy to recommend the best option based on your project type and location.

FAQs

How long does a liquid applied roof coating last?

Most liquid systems such as Ultra Flex, Perma-Flex, and Desmopol offer lifespans of 20–25 years when properly applied and maintained.

Can liquid roof coatings be applied in cold or damp weather?

Yes. Products like Aquapol are specially formulated for damp conditions and can be applied even when light rain or moisture is present.

Are liquid applied systems suitable for both new and existing roofs?

Absolutely. These coatings adhere to a wide range of substrates, making them ideal for refurbishment projects as well as new installations.