Under Deck Waterproofing in Eastside King County

Keep Your Space Dry, Beautiful, and Usable Year-Round

At Petra Decks, we believe every inch of your outdoor living space should be functional and protected — rain or shine. Our under deck waterproofing services keep the area beneath your deck dry, turning it into a comfortable, usable space while extending the life of your deck.Whether you want extra storage, a cozy patio, or simply protection from Eastside King County’s wet weather, we have the expertise to make it happen. 

 

Under deck waterproofing system installation

 

Why Choose Petra Decks for Under Deck Waterproofing?

  • Local Deck Company – Proudly serving Eastside King County homeowners for over 25 years.

  • Professional Deck Builder Expertise – We handle every stage of deck construction, from framing to finishing touches.

  • Client Satisfaction Guaranteed – Our process is built on quality craftsmanship, transparency, and reliability.

  • 5-Star Reviews – Homeowners trust us for results that look great and last.

  • Free Consultation – We’ll assess your space and provide a clear, no-pressure estimate.

Our Waterproofing Process

  1. Inspection & Planning – We assess your existing deck or design a new one with integrated waterproofing.

  2. Drainage System Installation – Custom under deck drainage solutions to channel water away effectively.

  3. Ceiling & Finishing – Decorative under deck ceiling panels for a polished look.

  4. Final Testing – Ensuring water flows exactly where it should, keeping the space below completely dry.

Benefits of Under Deck Waterproofing

  • Create a dry, usable area under your deck

  • Protect your deck structure from moisture damage

  • Reduce mold, mildew, and rot risks

  • Increase home value and curb appeal

  • Add functional living or storage space without expanding your footprint

Areas We Serve

We proudly provide under deck waterproofing services in:

Get a Free Estimate for Under Deck Waterproofing

Contact Petra Decks today to schedule your free consultation.
Let’s create a dry, functional space under your deck—designed to last through every season.