Cold Applied Liquid Waterproofing

Flame-Free Roofing for Modern Buildings

As building regulations tighten and insurance requirements become more demanding, flame-free roofing systems have become the preferred choice for a growing number of property owners. Cold applied liquid waterproofing eliminates the need for naked flames or hot bitumen on the roof, making it particularly suitable for occupied buildings, schools, hospitals and commercial premises where hot works permits and fire risk management present significant logistical challenges.

At Henleys Roofing Ltd, we have extensive experience installing cold applied liquid systems. We work with industry-leading manufacturers to specify the right system for each individual project, taking into account factors such as roof size, foot traffic levels, existing substrate condition, insulation requirements and budget. Our installations are backed by manufacturer warranties of up to 25 years, giving you long-term peace of mind.

Cold Applied Liquid Waterproofing

Cold applied liquid waterproofing systems consist of a resin-based liquid membrane that is rolled or brushed onto the roof deck, often reinforced with a polyester fleece or glass fibre mat. Once cured, the system forms a seamless, fully bonded waterproof membrane with no joints, laps or seams where water can find its way through. This makes cold applied systems especially effective on roofs with complex detailing, multiple penetrations or irregular shapes where sheet membranes would require numerous difficult-to-seal joints.

Because no flame or heat is required during installation, cold applied systems can be safely installed directly over combustible substrates such as timber decking and PIR insulation boards without any fire risk. The liquid conforms perfectly to upstands, outlets, pipes and other details, providing continuous waterproof protection across the entire roof surface. Most cold applied systems are also trafficable once fully cured, making them ideal for balconies, walkways and accessible roof terraces.

Key Benefits of Cold Applied Liquid Waterproofing

• No naked flames – eliminates fire risk during installation, ideal for schools, hospitals and occupied buildings where hot works are restricted
• Seamless waterproofing – cold applied liquid systems form a joint-free membrane that conforms perfectly to complex roof details and penetrations
• Exceptional longevity – cold applied systems offer service lives of 20 to 25+ years, significantly outperforming traditional built-up felt roofing
• UV and weather resistant – cured liquid membranes are resistant to ultraviolet degradation and will not become brittle over time
• Environmentally responsible – no fumes, no hot bitumen and reduced energy consumption during installation compared to torch-on and hot-applied methods
• Versatile application – suitable for new build and refurbishment projects across domestic extensions, commercial buildings, flat-to-pitch conversions, balconies and more
• Manufacturer-backed warranties – systems installed to manufacturer specification and backed by insurance-backed guarantees of up to 25 years

Is Cold Applied Right for Your Roof?

Cold applied liquid waterproofing is an excellent choice for a wide range of flat roofing projects. It is particularly well suited to roofs with complex geometry, numerous penetrations or areas requiring trafficable finishes, thanks to its seamless, fully bonded nature. Whether you need to waterproof a domestic extension, a commercial building, a balcony or a roof terrace, cold applied systems offer a versatile and reliable solution. Our team will survey your roof, discuss your requirements and recommend the most appropriate specification for your specific situation.