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How To Sand A Deck With A Belt Sander

how to sand a deck with a belt sander

Routine upkeep is the secret to any polished wooden structure, and your wooden deck is no exception. Even with regular upkeep, the deck loses its luster. To restore the deck's appearance and maintain its durability, you'll need to stain it again.

Now, sanding with a belt sander removes all previous stains, smoothens the surface, and opens up the pores using a coarse sandpaper belt. Sanding is an essential step in the staining process since it aids the deck's ability to absorb the stain. While using a belt sander to polish a deck may seem simple, You must consider several factors to complete the task successfully. Without the correct instructions, you risk damaging your entire deck.

We have provided these thorough step-by-step instructions to help you sand your deck yourself. We’ve also covered project planning and personal safety to complete the project successfully and safely.

Steps For Sanding A Deck Using A Belt Sander


Using a power washer or detergent and water, clean the deck before sanding it. It will eliminate any dirt or grime accumulation on the surface.


Allow the deck to dry completely for one to two days after cleaning. Otherwise, your sanding tool will clog up later, and sanding won't work.


After thoroughly cleaning and drying, examine the deck for any uneven areas, protruding nails, and holes. Use a nail set and hammer to remove the nails or recess them. Otherwise, it can ruin the sanding belt. You can fix the holes with wood filler and a putty knife. Before sanding, make sure the filler is firm.


Start sanding with a coarse 60–80 grit sanding belt on your belt sander. It will quickly remove any outdated sealants and stains. Sand parallel to the planks as you enter, starting at the corner.


The grinding belts may become clogged during sanding, which shortens their lifespan. With a belt cleaning stick, you can clear the obstruction. After finishing the coarse belt, switch to a fine belt with a 150+ grit rating to smooth the surface.


To prevent clogging, remove wood dust with a hand brush or Hoover cleaner before using a fine grit belt. When the deck is ready for staining, resand the entire surface using a fine sanding belt.


Following the main deck sanding. Step up to the railing and deck edge. For the deck edge and railing, the procedure is the same. You'll start with coarse sanding belts and work up to finer ones.


The higher portion of the railing where we place our hands can be sanded using the same belt sander. But a detailed sander might be necessary for the small places between the railing and the deck edge. Use a sanding sponge to eliminate sharp edges.


Lastly, use a long screwdriver to remove all the dirt and debris from the spaces between the planks. Then, brush or vacuum the area for a final brushing or vacuuming.


Your safety must come first before you begin sanding. Knee pads are crucial because you'll spend much time working on your knees. Next, wear your mask and eye protection to protect yourself from dust and wood dust that fly around when you sand.

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