A family-owned waterproofing contractor protecting Los Angeles & Orange County properties for over 40 years.
Capital Deck & Stair is a family-owned and operated waterproofing company built on doing the job right the first time. For over 40 years we have protected homes, HOAs, and commercial properties across Southern California from costly water damage.
We specialize in deck, balcony, and stair waterproofing, magnesite repair, concrete sealing, and commercial systems, every project fully licensed (#1005325) and insured, most backed by our 8-year warranty.
Decades of hands-on waterproofing across LA & OC.
Guaranteed workmanship that lasts.
Fully licensed (#1005325) and insured.
Local, responsive, and accountable to you.
We assess the substrate, drainage, and existing coating to pinpoint the real source of water intrusion, not just the symptom.
We remove failed coatings, repair cracks and dry rot, and rebuild a sound, stable substrate before anything else.
We install the right coating system for your surface, traffic, and exposure, applied to code by experienced crews.
We review the finished work with you and back most projects with our industry-leading 8-year warranty.
Licensed, insured, and family-owned. Get your free estimate today.