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Roofing Roofing ALT MMA membrane systems
Waterproofing ALT MMA membrane systems
Traffic ALT MMA vehicular & pedestrian traffic systems
Flashing Icon Flashing ALT MMA reinforced flashing systems
Tech Guide Technical Library For design professionals & applicators
Products Roofing, Waterproofing, & Surfacing Product Data
MSDS Material Safety Data Sheet Library



ALT Global Guide Spec Library


ALT Global Flashing Detail Library




  • Quick easy application
  • Low maintenance
  • Fast curing
  • Minimal disruption
  • Cold temp application


  • Fully reinforced membrane
  • Cold applied
  • Seamless
  • Flexible
  • Durable
  • UV resistant
  • Root resistant
  • Chemical resistant


  • Single-ply roofing
  • Modified bitumen
  • Asphalt BUR
  • Concrete
  • Wood
  • Metals
  • Plastics


  • New construction
  • Refurbishment
  • Renovation
  • Repairs

ALT Umbrella


Seamless Liquid Applied Membranes

ALT systems are flexible and seamless monolithic waterproofing solutions that substantially outlast and outperform traditional waterproofing materials.  In addition, ALT membranes conform and bond directly to the substrate, eliminating the need for caulked terminations and pitch boxes, thereby providing a virtually maintenance free system.  ALT membrane may be installed with minimal disruption and less risk than many conventional waterproofing systems, offering a diverse range of solutions suitable for most roofing needs.


Used where long-term cost effective protection is required.  ALT systems eliminate the risks associated with adhesive, torches, and hot-applied systems while providing ease of application for access restricted and difficult waterproofing conditions.  The membranes are also less prone to accidental damage by other trades during construction.


ALT systems are ideal for refurbishing existing waterproofing systems where persistent leaking and problems have been encountered.  In many cases they may be used as recovery systems, eliminating the cost and disruption associated with removal of the existing waterproofing.


ALT membranes and flashing systems are ideal for repairing existing waterproofing where problems will typically occur at joints, seams, flashing and penetrations or where different materials interface.

Typical Waterproofing Membrane System (un-insulated)

R230 membrane smooth finish

1-Accpetable substrate

2-ALT Primer

3-ALT R230 Resin

4-ALT Fleece

5-ALT R230 Resin

6-Optional Aggregate Surfacing

7-Optional ALT Finish

Typical Waterproofing Membrane System (insulated)

R230 Roof Membrane (Insulated)

1-Acceptable Substrate

2-Acceptable Rigid Insulation

3-Acceptable Roof Barrier Board

4-ALT Primer

5-ALT R230 Resin

6-ALT Fleece

7-ALT R230 Resin

8-Optional ALT Finish