We provide a full line of services to meet your waterproofing needs.
Our companies have significant knowledge and experience in the design, function, application, installation and performance of waterproofing, caulking, and moisture protection.


Our group of companies provides a wide variety of services that are typically classified as “waterproofing”. Generally, waterproofing is not defined as an individual system, but as a construction process that involves all the exterior building components. Waterproofing is a combination of materials or systems that prevent water intrusion into structural elements or finished spaces of the building. These materials or systems may fall into sub-categories such as air/vapor barriers, moisture protection, caulking and sealants, below and above grade waterproofing membranes, drainage materials, as well as exterior cladding and concrete sealers. The waterproofing contractor is also often responsible for flashings, joint fillers, masonry sealers, concrete densifiers, firestopping, expansion joint assemblies, firestopping, green roofs, pedestal paver systems, and many other ancillary items. Please contact us for all your waterproofing or restoration needs.



It is great to work with a company that approaches every aspect of a project with the level of professionalism and pride that GDA does. Their involvement in industry organizations and their training programs demonstrate their commitment to excellence.

Rick Johnson, South Central Regional Manager, BASF

W. R. Grace

It is rare to find an applicator that cares as much as GDA and their group of companies.  They have taken waterproofing to the next level.

Jill Heidorf, Architectural Sales Rep, W. R. Grace

United States Cold Storage

The George D Alan Company has done an excellent job...I would definitely recommend this company to anyone with floor issues.

Chad Saltzman, Chief Engineer, United States Cold Storage, Inc.

Silicone Specialties

Every aspect of working with employees from GDA is a step above their competition.

Duane Barnett, President/ CEO, Silicone Specialties