ALT Global, LLC (ALT), a subsidiary of WestWood kunststofftechnik Germany, is one of the leading names in advanced cold applied liquid roofing, waterproofing and surfacing systems, with more than 20-years proven performance. Quality, innovation and service are evident from start to finish in our products, sales support and technical services. ALT products meet strict internationally recognized assurance standards for manufacturing, consistency, quality and performance. Our production facilities are ISO 9001:2000 registered.


ALT roofing and waterproofing systems are flexible, seamless, inherently root and rot resistant monolithic waterproofing solutions that outlast and outperform traditional roofing and waterproofing materials. In addition, ALT membranes bond directly to the substrate, eliminating the need for caulked terminations and pitch boxes, thereby providing a virtually maintenance free system. All systems are cold applied for maximum safety and efficiency. Additionally, our membranes may be installed with minimal disruption and less risk than many conventional roofing systems. ALT membranes can be applied in a variety of color combinations to match corporate colors or other aesthetic building elements. Custom colors are also available upon request.


Technical Support

Our knowledgeable and professional sales and technical staff can assist our clients to find the perfect ALT System to match the performance and budgetary requirements of each project. Our team will advise and assist architects, specifiers and contractors in the use and application of our range of liquid applied systems. Before, during and after every application, you can count on us to assist you every step of the way.

Nationwide Network
of Certified Applicators

To maintain the highest standard of quality, all ALT membranes are installed by factory trained and certified applicators.


ALT Global roofing, waterproofing and surfacing systems provide durability, performance and have exceptional life expectancy.