Do you serve my area?

We work within 50 miles of Seattle. That covers most of the Eastside, South King County, and Snohomish County.

Are you licensed and insured?

Yes. Fully licensed in Washington state and insured on every job.

How long does a typical deck build take?

Most residential decks take 3 to 7 days depending on size and complexity.

What materials do you work with?

Cedar, composite, pressure treated, ipe hardwood, and more.

Do I need a permit for a new deck?

Usually yes, depending on size and height. We handle the permit process for you.

How much does a new deck cost?

Most residential decks run between $15,000 and $50,000 depending on size, material, and scope.

Do you offer any kind of warranty?

Yes. We stand behind our work with a craftsmanship warranty on every project.

What makes Mill Decking different from other contractors?

We're a family business. The people who quote your job are the same people who build it. We've built 200+ decks across the PNW.

Waterproofing & Paver Installation

Deck Waterproofing and Paver Installation Seattle | Mill Decking

The Pacific Northwest's rain cycles don't forgive water intrusion. A properly waterproofed deck protects your framing, your ledger board, and everything beneath the surface from the slow damage that builds unseen over years. We also install paver systems from Western Interlock, Mutual Materials, MSI, and Eterno — properly base-prepped and leveled for Seattle's freeze-thaw conditions.

5+ years of experience

Certified Contractor

Seattle's Favorite Deck Builders 2026

What we offer — Waterproofing

Under deck and over deck protection, installed right.

Under-deck waterproofing membrane systems
Deck surface waterproofing and sealing
Zip Up System structural sheathing integration
Flashing and penetration sealing
Waterproofing as part of new builds, covered decks, and resurfacing projects

Why waterproofing matters in Seattle

Constant rain cycles accelerate rot in unprotected framing
Proper under-deck waterproofing creates dry, usable storage space below the surface
Protects the ledger board — the most common structural failure point on any deck
Extends deck lifespan by 10–15 years in high-moisture environments

What we offer — Paver Installation

Extend your outdoor living space at grade.

Residential patio and pathway paver installation
Pool surround paver builds
Raised paver systems using Eterno pedestals
Transitions from deck surface to yard grade
Base preparation, compaction, and proper leveling throughout

Materials we use

Western Interlock — PNW's premier concrete paver manufacturer
Mutual Materials — full range of brick, concrete, and regional masonry
MSI — natural stone and porcelain for premium outdoor finishes
Eterno — pedestal systems for elevated, level paver surfaces over uneven grade

FAQs

Do pavers shift or sink in Seattle's wet winters?
Properly installed pavers on a compacted, well-drained base hold through PNW freeze-thaw cycles. Base preparation is where most paver failures start — we don't shortcut it.
Can waterproofing be added to an existing deck?
Yes — we install under-deck membranes and surface sealing systems on existing structures as a standalone service.
Can pavers be installed alongside a new deck?
Yes — coordinating both in the same project scope ensures proper transitions and shared drainage planning.

Explore Other Services

Deck Building

Deck Resurfacing

Covered Patios

Railing Replacement