Under Deck Roofing System


Waterproof Pergolas


Create an Outdoor Living Space


Claim the Space Under Your Deck.


Lifetime Warranty. Request a Quote.

Serving Pierce, King, and Snohomish Counties

Create Your Outdoor Living Space Call (206) 455-6644

Undercover Systems Washington finishes the underside of your deck with a ceiling. Providing dry, useable outdoor living space without sacrificing headroom or aesthetics. Our under deck roofing system channels rainwater into your gutter system and provides a washable mold resistant surface. Panels are Easy to Remove and Replace for Plumbing or Electrical Access.


Our team of talented designers, project managers, and undercover system contractors provide a wealth of experience that is unmatched. With Undercover Systems Washington, the construction process moves seamlessly from design to installation.


Let us show you why we have been trusted by clients across Washington for years. Call (206) 455-6644 or complete the free estimate form.

Quality Counts – Choose Undercover Systems

  • Meets Class A Fire Rating
  • Modern, Grid-free Look
  • Easy to Clean
  • Stain, Mold, & Mildew Resistant
  • Interlocking Design is Water-tight
  • Pricing is $22-$25 a square foot

USI Undercover Systems LLC

We service the entire State of Washington and Oregon and are willing to travel to any territory not currently covered.


(206) 455-6644


(503) 922-1024



  • Pierce County
  • King County
  • Snohomish Co