Deck Refresh: Is a Pressure Washer Worth It for Old Wood?

Hey folks, I'm finally tackling my 20-year-old deck. It's got peeling stain, mildew spots, and some rough patches. I've never used a pressure washer before. I've seen videos of people restoring decks with them, but I'm worried about damaging the wood. Is it worth investing in one, or should I just rent a big one and hope for the best? I'm also on a bit of a budget (who isn't?).

Hey there! Budget-wise, if you only need it for one project, renting is probably the way to go. But honestly, a decent electric pressure washer (2,000 PSI or less) is under $200 at the big box store, and it'll come in handy for future siding, driveway, etc. If you go electric, you have way less chance of gouging the wood compared to a gas monster. Just use a wide fan tip (like 25-40 degrees) and keep it moving. Test in an inconspicuous spot first!

Good points from Wendy. I restore decks for a living, and I'd say watch out for the wood you have. If it's cedar or redwood (soft), go real easy. A 15-degree tip even at low pressure can tear it up. I'd also suggest a surface cleaner attachment if you rent – it's a game changer for even cleaning. But hey, for a one-off, you might be better off using a deck stripper and a stiff brush. Pressure washers can blast away the soft grain and leave that raised 'fur' effect. If it's just mildew and light stain, maybe just a good cleaning.

Whoa, safety first! Whatever you do, DO NOT point that thing at your face or body. High pressure can cause serious injection injuries – even with a small electric one. Wear goggles, long pants, and closed-toe shoes. And watch out for kicking up debris, especially if you're wearing shorts. Yeah, I've seen too many horror stories. Also, for the wood, never get closer than 18 inches, and use a low-pressure tip (white or green). And never use a jet nozzle on wood – that's asking for grooves!

Totally agree with Felix. I learned that lesson the hard way on my fence. I used a 0-degree nozzle out of curiosity and it instantly sliced a groove into the board. That stuff is no joke. If you decide to rent, I'd ask for a 2,500-2,800 PSI machine and use the detergent tank with a downstream injector. Spray some deck cleaner (like 30 Seconds or Sodium Hypochlorite mix) on the wood first, let it dwell for a few minutes, then rinse at a wide angle. That'll get the mildew off without scrubbing half to death. And plan a sunny/dry day because the wood will be soaked.