Best Sander for Decks

Best Sander for Decks – Tools for Exterior Wood Maintenance

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Maintaining the decking outside your home might be a tiresome task, but it sure is a rewarding one when the wood lasts a lot longer than if you left it to the weather. Something that is essential for maintaining your outside deck is to sand it down when it starts looking a bit worse for wear and apply a new coat of varnish. For this you will need a deck sander. You can use a belt sander for a deck, or an orbital deck sander, both of which we will discuss today within this tutorial. We will include what the best sander for decks is and the various brands that have manufactured some great machines which are the best way to sand a deck compared to other brands. Keep reading for information on the best sander for deck refinishing.



Sanders Suitable for Maintenance

To maintain your deck, you will need to use one of two types of electric sanders that are designed for this purpose and style of sanding. They are not the most affordable of all sanders, so you must make sure you get the right one. The one type of sander you could use is called the pneumatic sander, and the other is your standard orbital sander. In order to understand which is the better option for the job you have on hand, then you must understand the differences between all the machines.

Types of Sanding Tools for Decks


Pneumatic Orbital Sanders

Compressed air is the staple ingredient to success in any auto body workshop. They use it to inflate the tires of the cars, give them spray paint jobs, and clean the car of all dirt and grime. Funnily enough, some electric sanders, known as pneumatic orbital sanders are amazingly powerful because they also make use of the power of compressed air. They might be a little too powerful for sanding down your deck, and they can be hard to move around or control, so if you are not skilled yet, we recommend gaining some experience with these guys before you attempt anything that might ruin the deck forever.

  • High powered
  • Lower heat output
  • Setup is simple
  • Wood will be sanded quickly
  • Expensive
  • Motion is difficult to control and limited
  • Needs a compressor to work
  • Air hose is required

Orbital Pneumatic Sander for Decks

This type of sander will need a compressor bought separately because they do not come included. This might be what causes the tool to be expensive for you, and it can end up taking a lot of space so they are hard to store when not in use. 


Electric Orbital Sanders

An orbital deck sander is the best way to sand a deck. This machine is much easier to control than its pneumatic counterpart, and it makes it the preferred tool to be used by most DIY experts, and even professionals prefer to use it for the ease it offers. It is less intense with the sanding as the pneumatic sander, and this means there is less risk of damaging the surface of the wood.

Electric Orbital Deck Sander

Many orbital sanders will have attachments included, like a brush attached to the sander so that it sweeps up the dust as it stands, a vacuum to suck it up, and possibly even a container that catches all the dust so there will be less mess to clean up when you are done. Orbital deck sanders are not limited to sanding down decks. They are quite versatile and they can be used for many different types of jobs. This makes it a great investment for your workshop.

That being said, if you are skilled enough with a pneumatic sander, then we suggest you stick to the big guns because those machines are phenomenal sanders if you have the right know-how and practice.

  • Sands vertical surfaces, provided the direction of the grain is followed
  • Simple application
  • Can be found at any hardware store
  • Not too expensive
  • Sandpaper is quite coarse
  • More appropriate for general sanding
  • Control is hard to master


Electric Belt Sander

If you thought that pneumatic sanders were too strong, wait till you try out a belt sander for a deck. This is a bit too much strength for simply sanding down your deck. However, with the right amount of skill, you could use it for just about any large sanding job. They are suited for sanding and trimming down the edges, so if you need to smooth down the railings you will find this tool helpful.

Belt Sander for Deck Refinishing

The motorized sanding mechanism of these machines packs a big punch. Therefore, you must practice a bit before sanding down the deck at home or work so that you do not damage the smooth and flush surface. To find out a bit more from craftsmen who have tried these tools out and posted their reviews online. There are a few sites where you can find some epic comparisons of the different sanders, but ultimately, the belt sander is the more intense sanding machine.

  • High powered electric sanding machine
  • Able to smooth out the edges of the wood
  • A great option for sanding your deck
  • Simple to use
  • Works on various other surface materials
  • A lot of power is needed to complete the task
  • Costly machines, not suited for small budgets
  • Only uses one directional sanding motion
  • Must purchase the right size sander that you can use on your deck
  • Not all belt sanders are designed for the same task

If you are looking for the best sander for deck refinishing, do not be scared away from using a belt sander if that is the type of sander you have at home or in your workshop already. They can be used perfectly and can produce some outstanding results with the right amount of skill, and if you work with patience.



The Best Sanders for Refinishing Your Deck

Our next lesson will be for those who wish to refinish their deck. You should first ascertain what type of wood your deck was made with, as well as take into account the size of the deck, or what paint or varnish was painted over that you will need to remove. For this lesson to unfold, we will discuss the best sander for a deck made by various manufacturers.


Most Recommended: DEWALT Random Orbit Sander

Some think that buying into brands is feeding a lie and that they are no better than your average run-of-the-mill electric sanders. They are said to work the same way for a much higher cost. That might be the case with some aspects of life, but not when power tools are in question, because you want to make sure the job gets done safely and accurately. You need to have a lot of trust in these machines, and DeWalt has proven itself over the many years of manufacturing tools and equipment.

The orbital sander by DeWalt is not the most aesthetically pleasing of all the sanders on the market, but rest assured, it is one of the most effective. When you are really needing to get the job done, and it is proving to be a difficult job then the DeWalt sander is ideal for you to use. This brand has inspired hope into the world of sanding because of how reliable they are, and it is an amazingly versatile piece of machinery. It is so easy to change the disks out for a new one being only attached by Velcro.

Another feature that we have discussed earlier in this article, is the container that collects all the dust that is created by the sanding. The DeWalt random orbit sander is equipped with one of its very own, so you will not have to buy one separately. The dust collects in there as opposed to the floor, making the cleaning time much quicker. The DeWalt team has got you covered there!

In terms of power, the DeWalt random orbital sander has a motor with an RPM of 12000, which is its redline as well. RPM stands for Resolution Per Minute, and this makes it a very high-powered sander. You might be relieved and excited to learn that this machine does not only have one set of speeds but rather a selection, so you can change the speed up and down for the specific tasks you might require of it.

There is also a warranty of three years that you can appreciate. If anything goes wrong with the machine from a manufacturing standpoint, then they will replace or repair the sander for free. If you damage it and that breaches the warranty, unfortunately, you will have to bear the cost of it, but they are very well-made and hardy machines, so You should not have to worry.

DEWALT Random Orbit Sander
  • 3 amp motor delivers between 8,000 to 12,000 OPM
  • Separate counterweight and overmold grip for comfortable sanding
  • Dust-sealed switch for longer switch life
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  • Works for a variety of different jobs on different surface materials
  • High powered machine
  • Sanding disks attach with Velcro so they are easy to change
  • Stores easily when not in use
  • Dust collector included
  • Redlines at 12000 RPM
  • The vacuum cleaner must be attached and this can be difficult
  • Uncomfortable to use on low surfaces


Best Performance: MAKITA Belt Sander

These days, there are power tool snobs who might go as far as to call a belt sander the most basic of electric sanders when you consider the new innovative designs that have come out in recent years. In the past, craftsmen would be constantly filling holes that they made in the surface of whatever they sanded with a belt sander. This would be time-consuming and a waste of resources. Today, you can buy modern belt sanders rather than the old ones, and they offer more control to the user so there is less risk of causing damage to the deck’s surface. A perfect example of this is Makita’s belt sander, which is not just easy to use but includes all the refinements that one has become accustomed to from modern random orbital sanders.

Using belt sanders to achieve a flat surface on a deck is what they were designed for! Perhaps not a deck specifically, but the longer planks and larger boards. Additionally, belt sanders can also be used to round and smooth the edges of the planks for the deck railings. This can prevent splinters from accidentally jabbing you, causing pain.

There is more than meets the eye with the Makita belt sander, and you can tell when you switch on the motor. When the machine is at full power you might realize that it is not as loud as other machines similar to this one. There are mechanics installed that help with noise reduction, and it runs at about 85 decibels. The actual sanding disk is also much larger than most, so there is a higher chance you will be able to cover a larger space in less time.

The only downside with the Makita belt sander is that it has a high-speed setting, but the actual weight of the machine is too light. This can make the machine hard to control, particularly when you are changing from one board to another. The same issue can also be used to your advantage since it makes the machine much easier to sand faster down the length of the deck.

There can be an argument that this weight makes it simpler to maneuver for those who have had time to practice their skills. While it is not regarded as a difficult tool to use, for those who have never used a belt sander before, it can be a bit intimidating. This just means you have some practice to do, and you will be an expert in no time at all.

MAKITA Belt Sander
  • 11 AMP motor with speed control for consistency under load
  • Low noise emissions at 84dB amongst the quietest sanders available
  • Replaceable ceramic wear plate and low profile for solid balance
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  • Additional belts can be purchased
  • The dust bag attached is decent
  • Great for those with back problems
  • Low noise level
  • High-powered tool
  • Practice and skill are needed
  • Costly
  • Hard to control
  • Additional belts can be costly
  • Lightweight and hard to control


Best Value: BLACK & DECKER Orbital Sander

Now we get into what most consider to be the best value for your money spent. The Black and Decker orbital sander is one of the easiest to use, thanks to its design which is very easy to work out. Of course, there is a manual with instructions, but you will learn the tricks of this machine in no time at all. Alongside its easy-to-use aspects, you can also clean this machine after you are finished without much difficulty, and storing it when it is not in use follows suit.

You will find this sander extremely useful for the larger spaces that need sanding because of the speed that it reaches. It might be a sander that is designed for beginners, but many professional craftsmen still make use of this machine because of how quick and easy it can get the job done. It weighs about 1.16pounds, and that is light enough to make changing directions easy to do. This also helps to prevent any dents from being made on the surface of the wood by struggling to maneuver it. There Are a few downsides, and one is that the dust collecting compartment is not the largest, so you will have to empty it more often which can be cumbersome.

The motor of this machine reaches its redline at about 12000 RPM, which is surprising to many power tool snobs who might scoff at such an entry-level machine. This impressively high-powered tool is essential to any DIY enthusiast, or professional who needs to sand something fast, and with as much ease as possible.

BLACK & DECKER Orbital Sander
  • Compact and lightweight design to fit in tight spaces
  • 12000 OPM 2.0 Amp corded for quick swirl-free sanding
  • Comfort grip handle and built-in dust collection bag
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  • Simple to use
  • Redlines at 12000 RPM
  • Design is easy to understand
  • Well priced
  • Stores away easily when not in use
  • Easy to clean when finished
  • The dust collector is small
  • Can only work for a small job
  • Not suitable for a large space
  • High vibration



Features to Consider When Buying a Deck Sander

As you can see from the various sanders that we have listed above, there are a few features and characteristics that have made them more popular. Human beings are prone to leaning towards the more convenient side of life, and we can all see the designs have considered this. What are the additional features that are good to look out for when purchasing your electric sander? Let us take a look at a few examples.


Which Sander Type Is Best?

There is no saying which is the better designed electric sander. This will depend entirely on you, your skills with the power sander, what you need it for, the size of the surface you are sanding, and a bunch more factors. If you use the wrong end, and you do not have the right skill to master the intensity of the sanding mechanism, the deck’s surface has a high chance of dents being made from the sander being too strong for it.

Powerful Belt Sander for Decks

There might still be some risk involved when you are working with the lighter sanders, and you might still take a few nicks out of the deck’s surface, but the chances are still much lower. It is imperative to first work out the specifics of the job, and then decide on the type of sander to use for the job at hand.


What Are You Willing to Pay?

Buying a machine like this is certainly not cheap, but it is undoubtedly a powerful tool, which most of us would consider a worthwhile investment. The truth is that you are getting the best value for your money these days, but that does not mean that you are not deserving of more. However, depending on your price range and the application you will be doing, you should be able to choose from a variety of orbital or belt sanders.

Belt and Orbital Sanders for Decks

Resurfacing your deck is usually necessary every year, making it a wise investment to have within your tool collection. You should first consider the size of the deck, as well as the distance from the power supply. Will you only be using your sander for the refinishing of your deck? Or will you be utilizing it for a variety of jobs? For obvious reasons, if you are simply using the sander to refinish a small deck, then you will not have to buy the most expensive sander that is used for industrial jobs, but rather one that will be much more affordable and easier to use for the average person without as much skill.

Compact Orbital Sander used on Deck

If the deck you need to refinish is quite large, you may benefit from a larger industrial machine typically used for construction jobs. The type of sander you purchase should also be suited for your preferred ergonomics. If you have a sore back, you will want one where you do not have to bend down as much.


Do You Need Variable Speed?

The speed needed to complete a job is variable between the size of the deck, the type of wood used to create the deck, as well as what finishes you are removing from the surface of the deck. Sometimes all you need is fine-grit sandpaper on a low-speed setting, but occasionally (a lot of the time) you will need a machine with more power. Some orbit sanders only have a one-speed setting, but usually, you will find they have a selection of speeds from low to high.

Sandpaper for Sanding Decks

Different sanding speeds are suited to various tasks. The railings will appreciate a lower seed setting because it will allow you more control over where the sander is directed. The higher speeds are better when you are sanding down large boards, or extremely long planks, like for the decking in question.

This is not to say that only having a one-speed setting is impossible to work with, no matter the type of job you need the sander for. The right amount of practice will facilitate the skill that you need to use the single-speed sanders with ease. That way, you will become more accustomed to the amount of pressure you can apply to the wood without damaging the surface.


Do You Need Dust Collection?

If you haven’t already figured it out, buying a sander is very similar to deciding on the additional features you want your future car to have. Engine size, manual or electric windows, rear sensors are very helpful when parking in tight spaces. Each is equally as convenient and once you get accustomed to them, it is hard to downgrade. The same can be said for your deck sander. What other features are included in the one you are thinking of purchasing? Is there an option for different speeds that will enable you to perform more versatile tasks? Or maybe the brush attached to the bottom helps to brush away the dust that is created by the sanding?

Orbital Sander with Dust Collector

One of the more helpful features now increasingly common in the various designs by different manufacturers is an attached container to collect the dust created by the sanding machine so that it does not fall to the floor or suspend itself in mid-air, waiting to be inhaled. This makes the cleanup process that much quicker because there is less sawdust lying on the ground, and you can simply dispose the sawdust directly into the trash.


Do You Need Less Noise?

Some people are not a fan of loud machinery, and the best sander for a deck for them would be a silent one, or they might resort to a manual sanding process. The excessive and repetitive noise can be torturous for some ears, and the neighbors are more likely to complain if you have a workshop set up in your backyard. Luckily, the orbital deck sanders, which have become increasingly popular because of their easy design and lack of vibration. Some of them have been made to be less noisy as well, which we would advise using if you are sensitive to loud noises. There are noise and emissions regulations that the manufacturers have to follow to have their design approved for production.

Noise Level of Deck Sanders



How to Sand a Deck

Now that you are fully aware of all the little things that could make or break your deck sanding mission. There are a lot of advantages and disadvantages to expect with any form of sander, but at least they all work in pretty much the same way. Here are some guidelines to follow that will make the process so much more effective. Make sure you have adorned yourself in the finest protection gear because your safety and comfort are very important.

Safety Gear for Sanding Decks


Clean the Surface of the Deck

Any task that involves a bit of construction work will need to start with some cleaning, and inevitably end up with more cleaning. If you avoid the initial cleaning process you could ruin the sanding process and thus, waste some precious time and resources. Your sanding machine will work more effectively if you clean the surface of the deck first because the grime that will be scraped off with the wood, will end up ruining the sanding disk that is the key ingredient to the orbital or belt sander for a deck.

Remove Dirt Before Sanding Deck

The best way to clean your deck, and the fastest for that matter, is to use a pressure washer. Make sure that the wood is strong enough to withstand the high pressure before you switch it to its highest setting. Sometimes a low setting is good enough for the softer woods. Make sure that you wait for the wood to be dried fully before you move on to the sanding.


Preparing Your Surface

There will inevitably be a lot of foot traffic on the surface of your deck because they are meant to be used. They are perfect when you have friends over for a barbeque and you have some tables and chairs facilitating the comfiness, and a great view to accompany you. This does mean that there will be a lot of wear and tear, and most likely in a short period than you might care to admit. This just means you get to bust your sander out and have some fun using your power tools.

Before you sand it down, make sure your wood has dried properly after you cleaned it. Once you are certain it is dry, remove any nails, screws, or any other foreign items that might get in the way of your sander, and prevent it from sanding properly, or worse, damage the sanding disk.

Preparing Deck for Sanding

Next, we would highly recommend getting some wood filler and filling in the gaps that were left when you removed the screws. Sometimes there is a gap regardless of any screws having been there – fill those holes too! You will then sand them down later and you will not even notice that there was a hole there in the first place. Make sure you wait for the filler to dry before you start sanding.


Sanding Your Deck

Now for the part that you have been waiting for! You have prepared everything you could think of preparing, and now the deck is waiting to be sanded down. Make sure that you have your battery charged if the sander you are using requires one or make sure you have an extension cord long enough to reach the end of your deck. The sandpaper you should be using with your orbital sander should have a grit of about 60-80, which is quite rough. You can use a finer grit when you get the final sand over to smooth out the surface.

Paper Grit to Sand a Deck

Sand down each board’s length starting at one point on the board, starting at the top, and working your way down. To ensure that you achieve a consistent finish over the entire surface of the paper, it is imperative to take your time and minimize the pressure you apply. Using a belt sander for a deck with minimal pressure is the simplest way to do this, especially with a hardwood deck. Although an orbital sander with sufficient power can accomplish the same thing, it all depends on how you approach and the technique you use.

The goal is that once you have sanded about a quarter of the deck’s surface, you will be able to see whether or not you have that perfectly smooth and even finish over the whole deck. If you feel you need to go over a few spaces, feel free to do so. The next thing you need to do is to work on the railings once you have finished the deck’s surface. Remember you should be using finer grit sandpaper depending on the type of wood used.

Random Orbital Sander for Deck

When you are sanding down the railings of the deck we recommend doing so manually. There are too many different angles for the railings and you might struggle to move the sander around easily. This might cause some damage to the surface of the railing.



There are many disadvantages and advantages that you can expect from the various electric sanders. The right one will be dependent on what you want to do with it. We hope that this tutorial has shed some light so that you can make a more informed decision when purchasing your electric deck sander. Have fun on this new adventure of learning a new skill, and enjoy the professional feel that your deck shall encompass.



Frequently Asked Questions


How Do I Sand a Deck?

The best way to sand a deck is to start by cleaning it. Once it has dried, you can then start to sand it down. This way you will get a smooth and even finish. Repeat the process if needed for the single board, then move on to the rest.


How Strong Must the Sandpaper Be for Deck Sanding?

The strength of the sandpaper used will depend on what you are using it for. If you are removing an old coat of paint then we would recommend very coarse sandpaper. If you are simply smoothing out the surface, then you only need slightly coarse grit sandpaper.


Is It Worth Sanding a Deck?

Everything that is man-made will need a bit of maintenance from time to time. To maintain a deck, you will need to sand it down so that you can add more treatment to the surface. This will extend the longevity of your deck, saving you time and money.


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