For smaller structures such as an arbour or a pergola it might not be a big deal but for larger surfaces such as a wooden deck youll want to go for something thicker that lasts longer. Most homeowners find it entirely possible to sand using ordinary consumer power sanders though patience is required especially with a large deck which may require several days of work if you are using a hand power sander.
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Wipe down the whole surface with a tack cloth to remove any dust from sanding.
Do you have to sand a deck before staining. To remove those last bits of finish palm sand with medium sandpaper 150 grit until you see the bare wood. Sand in the direction of the wood grain. The wood grain needs to be totally exposed so the stain will take.
You need to sand a deck before you stain it power washing is not enough people. In some cases sanding is a better alternative than power washing because it flattens and smooths weathered boards while removing the old finish. As with any good remake it begins with a good wash and ends with the right product.
You can sand through the layer of stained wood and apply any type of stain but this is time consuming. Use 50 to 80 grit sandpaper. Lesson learned time for a do over.
For maximum protection use a solid stain or paint. I would power wash the deck then sand it lightly to smooth out any fuzz. I rented a floor sander from home depot and used 60 grit sand paper to remove the remaining stain from my deck.
If your deck already has a semi solid or solid stain use the same type of stain again. Sanding a wood deck. You do not need to sand railings as they are a vertical surface and do not wear as fast.
Cleaning your new deck. After the deck has dried you are now ready to sand the deck. Then switch to fine sandpaper 200 grit until the entire piece is uniform.
Use a pole sander so you can sand the deck standing up. The more pigment a stain has the better it protects the wood from ultraviolet light. Any of these will adequately sand your deck if used properly.
You would need to remove the sanding dust. If your deck is larger than 100 square feet you can save time and effort by renting a flooring orbital sander to do the job. To answer your direct question no you dont need to clean the deck if all the wood is sanded down to raw wood.
Otherwise the stain will sit on top like paint and just look blotchy. Alternatives to power washing. Sanding takes more time but its the right way to do it.
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