115+ Years of Experience

Professional waterproofing, caulking & exterior hardscaping

Residential

Commercial

Facility Types

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We've performed work in the D.C. metropolitan area for over 100 years.

Chamberlin-Washington strives to provide simply the best services to our customers which means we focus on the details – like cleaning up, respecting our clients’ space, while being honest and efficient. We tailor each project to your specific need. We are known for our superior customer service, our professionalism, and pride in workmanship.

What We Do

Services You Can Count On

Waterproofing

We specialize in the prevention of water intrusion, including professional installation according to manufactures and product requirements keeping water out of buildings, homes, and parking garages.

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Caulking

We specialize in caulking, both the process and material (also called sealant), to seal joints or seams in various structures and a wide variety of applications for the prevention of water intrusion.

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Restoration & Repair

Specializing in masonry restoration, preservation, and conservation for decades, we are the experts of repairing, cleaning, and restoring.

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Gallery

See Our Work

Exterior Hardscaping

Waterproofing

Caulking

Masonry

Our Mission

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

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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