In the UK, liquid waterproofing has been issued with approvals by the leading testing and approvals house of the British Board of Agrément since 1975 and has evolved dramatically since then. The materials used in the liquid roofing process are high performance, with many of the products being independently tested and verified.
Liquid waterproofing provides a cost-effective method for waterproofing both new or existing roofs, and when correctly installed and maintained can provide long-term waterproofing (depending on the coating system employed), often in excess of 25 years, giving users the benefits of a watertight surface that is also highly durable and hard wearing. The ease and speed of installation is increased by the easy application of the liquid waterproofing by roller, brush or airless spray, and it is estimated that liquid roofing can provide savings of up to 70% on roof replacement costs.
In repair and refurbishment projects, liquid roofing provides an installation process with no need for noisy generators or cabling, with the contractors only needing to bring onsite what they need for that day. This means that projects where there is difficulty of access, lack of available storage, or difficulties in getting power to a roof, all benefit from liquid waterproofing.
Because the liquid coating offers a seamless roof finish and bonds fully to the substrate, it is ideal for use over existing roofing. The coating forms a permanently elastic membrane which make it a great, easy choice for terraces, patios and balconies, where complex detailing, up-stands, penetrations, terminations and edge details are evident. Liquid waterproofing can also be used above pitches of 15 degrees, as well as below a 5 degree pitch, making it wholly flexible in its uses and suitable for roofs with a combination of flat and pitched areas.
Liquid roofing systems encapsulate whatever surface they are applied to, meaning that whatever is underneath will be preserved and protected from weathering. Using a liquid coating for asbestos roofs is advisable, as this seals in the asbestos, making the disturbance of the material which can trigger asbestosis much less likely. Unlike other installation processes, liquid roofing involves no hot works which can present serious fire risks to both contractors and a building’s occupants. Because the coating material used in the liquid roofing process is applied cold, any fire risk is avoided, meaning that it is a much safer alternative to consider.