Did the pressure washing crew just destroy my old deck boards?

Pressure washing doesn't acutally shred healthy wood fibers unless the nozzle is held an inch away from the surface for an eternity. What you're seeing is almost certainly a case of the machine revealing **deteriorated wood** that was alredy structurally compromised by years of UV damage and moisture. If the wood was healthy, it would just look clean after that long, not like it went through a wood chipper. That fuzzy texture is called furring. It happens when the high pressure lifts wood fibers that have already lost their lignin, which is the natural glue holding the wood together. While the contractor claims they can sand it down, you need to check how deep that damage actually goes. Take a flathead screwdriver and poke some of those shredded areas. If the metal sinks in easily or the wood feels soft and punky, no amount of sanding or paint is going to save those boards. You can't paint over mush and expect it to stay attached for more than a season. If the boards are still structurally sound under that layer of fuzz, they absolutely have to hit it with a random orbital sander using 60 or 80 grit paper. Don't let them just spray over the fibers. If they do, the paint will bond to the loose fibers instead of the solid wood, and the whole finish will peel off in sheets when you walk on it. It is a massive amount of labor to do correctly, which is why a lot of cheaper crews try to skip it or do a rushed job. Honestly, if a deck is at the point where a standard cleaning turns it into a hairy mess, you are usally better off replacing the deck boards. Old pressure-treated wood was definitely chemical-heavy and rot-resistant, but it still has a limited shelf life. Painting it now is just a band-aid. If you do proceed, make sure they use a high-quality **solid color stain** rather than a standard exterior latex paint. Paint traps moisture inside the wood, which will just accelerate the rot that the pressure washer already uncovered.

I'm defintely going to try that screwdriver test on my own boards today. I was wondering though, if the contractor didn't mention sanding in the original quote, is that somethig they usually charge way more for once they see the damage? I’m worried about getting hit with a huge 'extra labor' fee if I point out the fuzzing.

Also, does solid color stain really hide the texture of those shredded fibers? I’ve seen some decks where you can still see the grain even with heavy stain, and if the wood is already all chewed up, I'm afraid it'll just look like painted lint.

Watch out for that "sprayer" plan. If they just spray a solid stain on old, thirsty wood without back-brushing it in with a real brush, it’s going to peel in a year anyway. The sanding alone is a massive job—if it wasn't in the original bid, they'll defintely want more cash becuase it's a total grind. If the boards are relly that fuzzy, you're looking at a ton of prep. Sometimes by the time you pay for the labor to save "shredded" wood, you're halfway to the cost of just buying new lumber. Don't let them rush the prep just to get to the painting.

That claim about old PT wood being tougher is true for rot, but the surface still gets brittle. If that worker used a red 0-degree nozzle, he basically used a water-knife on your deck. Even healthy wood can't stand up to that without splintering. If they sand it deep enugh to remove the fuzz, they're thinning the boards. You might end up with bouncy spots if they go too aggressive. Definitely check the joists underneath while they’re prepping; no point spending a fortune on labor if the skeleton of the deck is already going soft. Those fibers in your yard are a huge pain to clean up, too.

Make sure you check the moisture content before they even touch it with a sander or stain. Since that kid blasted it for four hours, those boards are likely waterlogged. If they try to sand damp wood, the sandpaper will just gum up and create wet 'slurry' rolls instead of clean dust.

You relly need a cheap moisture meter—don't let them apply anything til it’s consistently under 15%. If they spray while the core is still wet, you’re sealing in a swamp, and that solid stain will bubble up and pop off by next spring regardless of how much sanding they do.