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- LRWA Design Guide for Specifiers
This Design Guide, prepared by the Liquid Roofing and Waterproofing Association (LRWA), gives advice and recommendations on the specification and use of liquid applied waterproofing systems.
- LRWA Hot Melt Code of Practice (April 2025)
This Hot Melt Code of Practice, prepared by the Liquid Roofing and Waterproofing Association (LRWA), is the result of unpaid cooperation by professional
technical experts across the UK Hot Melt industry. It is intended to be recognised as a code of best practice and, as such, it should be used to guide behaviour relating to the design, specification, installation and maintenance of Hot Melt waterproofing systems.
- LRWA downloads
LRWA guidance notes
- Guidance note no 1 – roof, balcony and walkway inspection for the specification of liquid applied waterproofing systems
- Guidance note no 2 – substrates for liquid applied waterproofing systems for roofs, balconies and walkways
- Guidance note no 3 – generic types of liquid applied waterproofing systems for roofs, balconies and walkways
- Guidance note no 4 –roof, balcony and walkway refurbishment using liquid waterproofing systems
- Guidance note no 5 –health and safety provision for liquid applied waterproofing systems on roofs, balconies and walkways
- Guidance note no 6 – safe use of liquid applied waterproofing systems
- Guidance note no 7 – specifier guidance on flat roof falls
- Guidance note no 8 - CE marking of liquid applied waterproofing kits
- Guidance note no 9 -waterproofing of profiled fibre cement sheet roofing and cladding
- Guidance note no 10 - waterproofing of metal profiles sheet roofing and cladding
- Guidance note no 11 -use of adhesives for liquid flat roof systems
- Guidance note no 12- termination of waterproofing at cils and thresholds
- Guidance note no 13- drying of existing roof substrates prior to the installation of liquid waterproofing systems
- Guidance note no 14 - best practice for the installation of water flow reducing layers (WFRL)
- Guidance note no 15 -clarification of BS 6229 regarding thermal performance if inverted and blue roofs
- Guidance note no 16 - walls built onto waterproofing systems
- Guidance note no 17 - best practice for the installation of flues passing through a flat roof
LRWA detail drawings
- Warm roof 1 - minimum 300mm insulated upstand
- Warm roof 2 - typical external gutter
- Warm roof 3 - typical movement joint with raised kerbs
- Warm roof 4 - typical pipe penetration
- Warm roof 5 - typical rooflight or access hatch
- Warm roof 6 - typical sumped internal outlet
- Warm roof 7 - typical watercheck
- Inverted roof 1 - typical balcony with low level threshold
- Inverted roof 2 - typical insulated parapet
- Inverted roof 3 - typical pipe penetration
Guidance notes - flat roof sector
Guidance notes - coatings industry
LRWA Code of Practice
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