Rooflock Twelve for flat roofing

BBA and ETA certified, seamless liquid-applied roof waterproofing system for flat roofing

Rooflock Twelve for flat roofing

Rooflock Twelve is a seamless liquid-applied roof waterproofing system for waterproofing both new-build and refurbishment projects, that is appreciated by contractors for its ease of use.  Rooflock Twelve Roof Waterproofing System offers a safe, flexible method of waterproofing roofs, balconies and walkways, including green roofs, inverted roofs, podium decking and high traffic areas.

BBA and ETA Certified

Rooflock Twelve is fully certified by the British Board of Agrément (Certificate No. 17/5455) and to ETAG 005 (Certificate No. ETA 14/0258) and has a certified durability of in excess of 25 years.

A guaranteed roof system

With warranties of 10 and 20 years available, you can have the assurance of a high performance and durable roof system.  (For projects requiring a warranty, Rooflock technical team must be consulted prior to commencement of project)

Durable and hard wearing

Rooflock Twelve is designed to withstand light foot traffic and a further high resistance layer can be applied to areas expected to withstand heavy foot traffic. An additional non-skid coating system can be applied to walkways and balcony areas.

Approved contractors

The Rooflock Twelve Flat Roof Waterproofing System is installed by a national network of approved contractors to ensure ongoing high standards of workmanship.

Podium waterproofing

Rooflock Twelve is suitable for podium waterproofing.


The Rooflock Twelve Flat Roof Waterproofing system is typically applied using the wet-on-wet technique, which crucially ensures total integration of the embedment layer and top layer, and avoids delamination risks. Installation is rapid and weather-related delays are reduced.


Rooflock Twelve coating does not contain plasticisers, eliminating the risk of waterway contamination, and ensuring that the system does not go brittle over time.


  • Cold applied
    –   no hot works insurance
  • BBA and ETA certified for in excess of 25 years
  • Guaranteed roof system
    –   10 and 20 years warranties
  • Fully reinforced, seamless roof covering
    –   no joints or fixings, even at terminations and penetrations
    –   high strength and durability
  • Vapour permeable
    –   suitable for refurbishment applications
  • Free from plasticisers
    –   reduces pollution of waterways
    –   remains flexible and does not go brittle over time
  • Compatible with almost all roof substrates
  • Designed for both new build and refurbishment projects

Compatible substrates

  • Asphalt
  • Metal
  • Bitumen
  • Insulation (1) (2)
  • Plywood (1)
  • Brickwork
  • PVC Single Ply membranes (2)
  • Concrete
  • Solar reflective coatings
  • Fibre cement
  • Masonry
  • GRP
  • Stone
  • Hot melt coatings
  • Timber

(1) Requires Rooflock carrier membrane

(2) Contact Rooflock Technical department