Deck Coating · Vancouver WA · Portland OR

Waterproof Deck Coating

360 Surfaces restores decks, balconies and landings with the Westcoat ALX Pro waterproof walking deck system. As a Westcoat Qualified Contractor Applicator, we install a Class A fire-rated surface backed by up to a 20-year manufacturer warranty and our 5-year workmanship warranty.

Westcoat QCA installer
Up to 20-year manufacturer warranty
5-year workmanship warranty
Class A fire rated

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Completed balcony deck with Westcoat ALX Pro tile-pattern coating by 360 Surfaces

Signs Your Deck Is Failing

Leaks, soft spots, peeling coatings and cracked surfaces are signs a deck is failing. We repair the damage underneath, then install a fully waterproof walking surface using the Westcoat ALX Pro system, backed by a manufacturer warranty and our own workmanship warranty.

ALX Pro can be installed over many existing deck surfaces as part of a restoration, and the system can also be applied over concrete, including entry steps, porches and patios.

Project Spotlight

Balcony Restoration, Start to Finish

This balcony deck had reached the end of its service life. We removed the existing surface, repaired the joists, installed new plywood and applied the complete ALX Pro system. Use the arrows, swipe, or press play to view each stage of the project.

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Before: the original balcony deck, balcony deck restoration by 360 Surfaces — Before: the original balcony deck

Removal of the existing deck surface, balcony deck restoration by 360 Surfaces — Removal of the existing deck surface

Joist repair, balcony deck restoration by 360 Surfaces — Joist repair

New plywood installation, balcony deck restoration by 360 Surfaces — New plywood installation

Lath fastened over the plywood, balcony deck restoration by 360 Surfaces — Lath fastened over the plywood

Base coat and reinforced membrane, balcony deck restoration by 360 Surfaces — Base coat and reinforced membrane

Texture coat application, balcony deck restoration by 360 Surfaces — Texture coat application

Completed: waterproof, concrete-look finish, balcony deck restoration by 360 Surfaces — Completed: waterproof, concrete-look finish

The completed balcony, ready for use, balcony deck restoration by 360 Surfaces — The completed balcony, ready for use

The Westcoat ALX Pro System

ALX Pro is a bonded, waterproof walking deck system applied in layers over plywood. Each layer serves a specific purpose:

Sheet membrane applied to every plywood seam
Lath fastened down for reinforcement
Base coat troweled into the lath
Fiberlath-reinforced resin membrane, which forms the waterproof layer
Slurry coat for a smooth, uniform surface
Texture coat for appearance and slip resistance
SC-10 acrylic topcoat to seal the system

System Benefits

Fully Waterproof

A durable walking surface that protects the structure below from water intrusion.

Decorative Finishes

The look and feel of concrete, with decorative options such as tile and stone patterns.

Durable Topcoat

A UV-resistant topcoat with a skid-resistant finish.

Fire Rated

Class A fire rating, one-hour fire-rated assembly, and compliance with Wildland Urban Interface (WUI) requirements. IAPMO ER-587.

Inside the coating

How the deck system is built

A waterproof deck is only as good as what is underneath it. Westcoat ALX Pro is built up one layer at a time, each with a specific job.

For decks, balconies & concrete

Westcoat ALX Pro deck system

Plywood or concreteFailing surfaces removed, framing repaired and new plywood installed where needed. ALX Pro also goes over concrete.
Sheet membraneApplied over every plywood seam.
Reinforcing lathFastened across the deck to anchor the system.
Base coatPolymer-modified cement troweled into the lath.
Fiberlath membraneA reinforced waterproofing membrane.
Slurry and texture coatsBuild the walking surface and the decorative finish.
Acrylic topcoatTwo coats seal the finished surface. Class A fire rated system.

Manufacturer and Workmanship Warranties

360 Surfaces is a Westcoat Qualified Contractor Applicator (QCA). Every ALX Pro deck we install is covered by two warranties:

Up to 20 years

Westcoat manufacturer warranty

The warranty term depends on the system and the surface it is installed over.

5 years

360 Surfaces workmanship warranty

Our own warranty on the quality of the installation.

Recent Deck Projects

Decks, balconies, covered porches and ALX Pro installations over concrete. Select any photo to enlarge it.

Long covered porch with dark tile-pattern ALX Pro deck coating — Covered porch, tile-pattern finish

Large upper deck with light grey ALX Pro coating and cable railing — Upper deck with cable railing

ALX Pro tile-pattern finish over concrete entry steps — Concrete entry steps

Covered concrete patio with ALX Pro tile-pattern finish — Covered concrete patio

Covered porch tented with tarps so the deck installation can continue in the rain

Year-Round Installation

We install year-round. In rain, we tent the deck with tarps, and in summer heat we schedule installation for the cooler early morning or evening hours. Work pauses only when temperatures fall below the manufacturer’s minimum.

To maintain protection and appearance, Westcoat recommends resealing the system every 3 to 5 years, depending on foot traffic and UV exposure.