Ultimate Deck Coating System (SEQ Conditions)

How to Build a Deck Finish That Actually Lasts The Problem Most Decks Have Most deck coatings fail early because the timber underneath was never properly prepared. In South East Queensland, this is made worse by merbau (kwila)

Bleed when wet Stain surrounding surfaces Interfere with coatings if not properly removed Once tannins stain concrete or masonry, you’re not removing them—you’re managing the damage

Stabilise the timber first. Then build your coating system on top of that.

Note: This guide applies to all timber types used for decking. The steps outlined below are particularly important for tannin rich timbers like Blackbutt, Western Red Cedar, Merbau/Kwila and Jarrah as well as oily timbers like Spotted Gum, Teak and Rosewood.

The PHMS System — Overview This is a layered system , not a single product solution. Remove tannins and contaminants Neutralise and brighten the timber Allow to properly dry Penetrating oil (timber stabilisation layer) Final coating (appearance + wear layer)

Protects the timber long-term Extends coating life significantly Produces a far better finish Step 1 — Tannin & Oil Removal Fresh merbau must be treated. Use a tannin and oil remover (alkaline cleaner)

Aggressively lifts tannins and surface oils Essential before any coating system begins This step is non-negotiable for new timber. Step 2 — Deck Wash & Brightening Follow with a deck wash solution