By ZIKRIA MUJAHID<\/a> \u2022 Home Painter Services \u2022 Last updated: 2026-07-11<\/em><\/p>\n North\u2011facing decks near Walker Park<\/strong> and the crescents off Tremaine hold moisture longer. After the same rain, they can trail sun\u2011soaked yards by 4\u20135 days. We add a buffer day and re\u2011check moisture before sanding\u2014especially where evening breeze off Tremaine at Bergamot<\/strong> brings heavy dew.<\/p>\n<\/div>\n Sand pressure treated wood lightly once it\u2019s dry (we look for \u226418% on a pin meter). The goal is to break mill glaze and knock back fuzz without polishing. Use 80\u2013120 grit, collect dust, and stain promptly for even color and reliable adhesion.<\/p>\n We treat sanding as a prep move, not a makeover. You\u2019re not grinding away the treatment or flattening boards; you\u2019re creating a fresh, micro\u2011profiled surface that lets an exterior stain soak in instead of sitting on top.<\/p>\n Example from our week: a Mississauga client washed their new deck, skipped sanding, and spot\u2011tested stain. Shiny mill\u2011glaze patches flashed lighter. One controlled pass at 80\u2013100 grit evened the surface, and the second test matched end\u2011to\u2011end.<\/p>\n Dry first, sand second, clean thoroughly, then stain the same day if weather cooperates. Target \u226418% moisture, 80\u2013120 grit, and dust\u2011free boards. This sequence prevents blotchy color and early peeling on pressure treated decks.<\/p>\n Sand when you see mill glaze, raised fibers, splinters, or blotchy absorption after cleaning. Don\u2019t sand if the wood is wet, decayed, or you\u2019re using a heavy\u2011build coating that tolerates minor texture. Always wash first and confirm dryness with a moisture meter.<\/p>\n Field note: We showed up to a job off Bergamot last May where the homeowner had already sanded\u2014but boards still read 22% on the meter. The stain looked fine for two weeks, then edges began lifting. We washed, waited for 16\u201317% readings, resanded lightly, and recoated; the finish held through winter.<\/p>\n For deck fields, we stop at 100. Go finer and you can burnish the surface so stain sits on top. For handrails and seating edges, we finish at 120 because fingertips feel everything. We reserve 60\u2011grit for isolated scars only, then blend those spots back to 100 with a random orbital so the sheen stays consistent.<\/p>\n Wash, dry, verify moisture (\u226418%), sand 80\u2013120 grit with a random orbital, vacuum and tack\u2011wipe, then stain the same day. This order protects penetration and keeps color even on pressure treated decks.<\/p>\n Need a refresher on cleaning gear and timing? Our power washing overview<\/a> explains dwell\u2011time choices and sequencing. Planning a full refresh? Review our square\u2011footage basics in this power washing article<\/a> before you book.<\/p>\n Skipping cleaning and light sanding leaves glaze and fibers that block stain, leading to blotchy color, early peeling, and a rough feel. Expect failure at board edges first, especially on steps and handrails with heavy contact.<\/p>\n For broader planning, compare wood options and behavior: a primer on deck wood selection<\/a> and a local look at pressure treated vs composite decking<\/a> can set expectations before you choose a stain system.<\/p>\n Call a pro when drying drags on, texture varies wildly, or you need repairs plus sanding and staining inside a tight weather window. A coordinated crew cleans, confirms moisture, sands, and stains without losing that ideal moment.<\/p>\nMilton & Mississauga timing tip our crews rely on<\/h3>\n
Should You Sand Pressure Treated Wood? The Short Answer<\/h2>\n
Quick Summary<\/h2>\n
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When Sanding Is Necessary (And When It Isn\u2019t)<\/h2>\n
Top 5 fixes for rough pressure\u2011treated boards<\/h3>\n
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Our grit choices\u2014and why<\/h3>\n
How to Sand Pressure Treated Wood Before Staining \u2014 Step by Step<\/h2>\n
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<\/p>\nWhat Happens If You Skip Proper Prep<\/h2>\n
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When to Call a Pro Instead of DIYing It<\/h2>\n
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