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.


A firestop is a fire protection system made of various components used to seal openings and joints in fire-resistance rated wall and/or floor assemblies. Firestopping is not just one material or item, but an assembly of various materials and components that restore the fire rating to wall or floor system. These materials and components may include mineral fibers, intumescents, cementitious mortars, silicone, urethane, firestop pillows, and rubber compounds. Our group of companies have the experience, training, and certifications to properly install firestopping in a variety of building types and construction assemblies. We are Factory Mutual (FM) 4991 Certified Contractors and undergo yearly auditing for proper installation, record keeping, and quality control processes. We work closely with respected manufacturers such as Hilti, STI, Rector Seal, 3M, and Tremco.



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