What Grit Sandpaper for Deck Sanding?

Sanding your deck is a vital step in sanding, so you must be careful to do it correctly. Before we explore the best ways to stain decks, let’s first discuss how to smooth them out.

After the deck is put in place, the wood is completely unprotected. This color will deteriorate if you don’t replace it after some time. Although this color can be elegant, it is essential to thoroughly dry the deck before applying either a protective stain or a seal. The coating of your deck must be prepared before you can add a stain.

One advantage of sanding a wood deck is to get a clean and smooth surface and remove any and repair any splinters or roughness. You are preparing the wood before adding the finish coat by sanding first, so you can rely on the latter to stay in place for a long time.

The best way to finish is by sanding the deck. The old stain can be removed, but re-staining your deck is a lot more complicated. A bonus is that it eliminates fragments and pieces of wood from the glass. Our handy guide to finishing your deck with sandpaper. If you want to know what grit sandpaper for deck sanding is, you would have to read this content.

Table of Contents

  • What Is Grit In Sandpaper?
  • Know About Sandpaper Grit Number
  • Choose the Right Sandpaper Grit for Deck Woods
  • Why Do You Need To Use Sandpaper For Deck Sanding?
  • Final Words

What Is Grit In Sandpaper?

Grit is a term describing the abrasive particles and is equal to the number of microns used. It does not matter if the finer grit number produces a cleaner finish. We use finer sandpaper since lower numbers reflect faster removal of material.

To get the best results from sandpaper, you must know which sandpaper grit for deck you should use. To being labeled according to the grain size of the abrasive used sand, sandpaper grits are often organized by the level of fineness. coarser or lower-grit sandpaper is less difficult to remove than finer grit sandpaper. A fabrication technique is used to do this by sharing the fibers on the surface.

In general, finishing or painting a surface progresses from coarse to fine grits to smoothness. Coarse sandpaper will roughen up the surface and take away any detail in painting or in refinishing.

Know About Sandpaper Grit Number

Grit is measured by the number of grains per square inch: the better the ranking, the more difficult the obstacle. Upward-numbered grades are used on finer grades of sandpaper. Also written on the back of each paper is the Grit value.

Although finer grades of sandpaper are commonly used to refine furniture and antiques, it’s common to use medium grades for general purposes. Repeated injury can ruin a fine surface finish. Medium-grit abrasives remove scratches or improve the existing finish. Grits with coarser grits are commonly served as a final stage of wood sanding before the stain. A grit number typically shows up on the sandpaper surface as well. Grit values generally are within a scale of 24#-1000#, but most users will rarely rise above or fall below these levels.

Some sandpaper grit numbers are given here below:

#60–#80 Grit: Coarse

The fine-grade sandpaper removes paint and the fine scratches with little effort. It also has the capability of removing wood, shaping, and smoothing out sharpening edges.

An edge like this won’t work for fine edges or fine details, so go for fine-grit sandpaper instead. It is crucial to use the lubricant carefully on the veneer because the thin face layers are hard to sand.

#100–#150 Grit: Medium

What is most often used is used on the spectrum of paper sandpaper is a coarse grade. For most uses, it is difficult to make mistakes with the grit variety of sandpaper. Through more significant effort, you can crush rock, or you can feather rock. In general, this sort of sandpaper is used on uncoated wood.

Most often, a finishing grit of 150 is advised for wood. This makes the paint thicker and more durable but leaves a slight tooth toothy surface.
Having the right amount of medium-grit sandpaper is essential for all kinds of projects.

#180–#220 Grit: Fine

This sandpaper usually is not used on the first pass unless the surface is already smooth. Fine-grit sandpaper is occasionally used as a first step for applying a glazed or smooth paint coat. A 220-grit sandpaper should not be used to stain a finished piece of wood unless you want to wear away the surface of the stain for fine- or ultra-fine-grit sanding.

#320 Grit: Ultra-Fine

Another degree of smoothness can be obtained with ultra-fine sandpaper. Ultra-fine sanding grits are also used to level between coats. Such fine grits are used for wet sanding that a smooth finish, enhancing the effectiveness of the abrasive efforts of the sandpaper. With 320-grit sandpaper, the finished surface is smooth.

Choose the Right Sandpaper Grit for Deck Woods

The success of your deck depends on the type of wood used. How many grit sandpaper for deck sanding you need depends on the kind of deck wood.


In most cases, a very smooth surface is desired with hardwood sanding. Redwood can go up to the 20-grits and remain flat after the sanding if needed. Use progressively finer sandpaper is the best grit sandpaper for redwood deck.


Many deck species, such as softwoods, can be damaged if you use power tools or sandpaper with grits much finer than usual. Treat coniferous timber, such as cedar wood, gently. For the first time, use 50-grit sandpaper. Regardless of the type of belt sander you have, oscillating or orbital sanders are the best to use on softwoods. Also, wear a particle mask and protective glasses when sanding, as it can contain tiny particles that can cause respiratory problems.

Pressure-treated lumber

Pressure-treated timber is a good solution for rot and termites. Preservative additives have been applied to pressure-treated timber, so it should be treated with caution. Pressure-treated lumber may be sanded but use safety glasses, a dust mask, and gloves. After you’ve sanded, wash your hands before you handle food.

Why Do You Need To Use Sandpaper For Deck Sanding?

  1. When sanding hardwoods, you still strive for the smoothest finish, but if you are sanding an exterior deck, roughness is the result you are trying to avoid. It is a good idea to use sand boards using sandpaper for deck of 60 or 80, but no higher than that, because you want to preserve the wood grain structure.
  2. Using sandpaper grit for sanding deck with finer grit will cause the pores to shrink, decreasing the amount of material the wood will take. Use the palm of your hand as you go to determine the evenness of the finish of the surface.
  3. This requires roughening the surface before painting to obtain an excellent adhesion, thus eliminating defects simultaneously for the paint to adhere.
  4. Choosing the best sandpaper grit for sanding a deck will make all the difference in a woodworking, painting, or finishing project. To help you pick out your next project’s sandpaper, here are some suggestions on how to do so.
  5. The numerical rating of the sandpaper describes the grit size of the particles. When the number is low, the material is scratchy; when it is high, it is abrasive.
  6. A finer grit leaves a larger number of noticeable scratches, so begin with the coarser paper and work your way up.

Final Words

When stored properly, these wood fibers can be very dry and susceptible to causing splinters. After power washing and sealing, you can expect to sand the deck. This is an essential step to successful finishing, which results in excellent work that looks great.

From coarse to very fine sandpaper is foundry sandpaper is on sale at your nearest hardware store. The higher the amount, the finer the sandpaper is, and the smoother the material will be removed but with less material left on the drum. Increasing the surface roughness with grit paper gives you better control, but decreasing the thickness will yield more content. Finally, it will provide you with a smoother wood surface as well.

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