LRWA launches updated Hot Melt Code of Practice

The Liquid Roofing and Waterproofing Association (LRWA) has launched an updated Hot Melt Code of Practice. It provides critical technical guidance that reflects the latest advancements and regulatory standards in the sector, developed in collaboration with experts from across the hot melt waterproofing industry. 

The document supports specifiers and contractors by offering comprehensive information on the design, specification, installation, and maintenance of hot-applied polymer-modified bitumen systems, more commonly known as hot melt. 

It also provides clarity on the nuances of zero falls design, especially relevant to inverted and blue roof systems, and includes detailed information on structural concrete decks, backfalls, surface preparation and moisture management. It also outlines product certification requirements, installation techniques, health and safety considerations, and ongoing maintenance. 

The 2025 Hot Melt Code of Practice is available to download free of charge from www.lrwa.org.uk.