An Industry Pioneer

About Us

Superior customer service, professionalism, and workmanship.

Chamberlin-Washington, Inc. was founded in 1898. We are a residential and commercial company specializing in waterproofing, sealants, exterior hardscaping, deck & traffic coating, exterior restorations and basement waterproofing, to name a few.

Our Mission

To provide high quality services and complete satisfaction to our valued customers and business partners.

Get in Touch

Testimonials

"Your teams are great professionals! I am very impressed with every one of them! I think they have done a perfect job and I am delighted. Bravo to all."

Elisabeth P., Homeowner

"There are no adequate words to thank you for all your kindness to me. Thank you from a very grateful heart."

Millie M., Homeowner

"You all are wonderful to work with - your patience and commitment is above and beyond."

Kerri Ann F., O’Neill Development Corporation

"Whenever any type of waterproofing is needed Randy Alverson and his employees would be our only telephone call. We have been very pleased with the quality of their workmanship. They are punctual, knowledgeable, and professional and our clients agree."

Andy C., President of Stone Works, Inc.

"Chamberlin-Washington always goes the extra mile to satisfy my clients wishes."

Jack S., Property Manager

"Many thanks for your excellent work; it is much appreciated."

Steve B., Homeowner

"CWI provided a comprehensive plan to resolve my problem. CWI’s work crew arrived as scheduled and they were GREAT!! They were polite, neat and very thorough and completed the work as scheduled. I recommend Chamberlin-Washington without any reservation."

P.F., Homeowner in Potomac, MD

"100% satisfied with their service!!"

Ben Jackson

"Thank you so much for the effort. It's very much appreciated. I wish some of our other subs were as diligent as you guys are. Plus let Randy know that the commission folks said that the waterproofing job done at Remote Inspection Facility was the best they have seen on the campus wide project. Keep up the good work!"

Joseph H., Gilford Corporation

"All of your work looks beautiful, thank you!"

Natalie M., Homeowner