Best Sanders for Decks of 2021

Updated
Refinish your garden deck with the best sanders.

Your new deck looks great when first laid, but it is under constant attack from weathering, mold, and mildew over winter. Grime builds up, making the surface slippery and discolored.

The best way to revive your deck is to refinish it, and for that, you will need the right tools. We check out the 7 best sanders for decks to make your life easier.

Our Top Picks

Real Talk: Sensible Digs earns a commission through the following independently chosen links at no additional cost to you.
Image
Model
Compare the Best
Features
Product Image of the Makita 9403 4' X 24' Belt Sander
Best Belt Sander
Makita 9403 Belt Sander
  • 84 db operation
  • 11-Amp motor
  • Large dust collection bag
Product Image of the Makita BO5030K 5' Random Orbit Sander, with Tool Case, Teal
Best Random Orbital Sander
Makita Random Orbital Sander
  • 3-Amp motor
  • 12,000 OPM
  • Ergonomic low vibration grip
Product Image of the DEWALT 20V MAX Orbital Sander, Tool Only (DCW210B)
Best Cordless Sander
DeWALT 20V MAX Orbital Sander
  • 20V cordless operation
  • Variable speed control
  • One-handed locking dust bag
Product Image of the Bosch Power Tools - GET75-6N - Electric Orbital Sander, Polisher - 7.5 Amp, Corded, 6'' Disc Size - features Two Sanding Modes: Random Orbit, Aggressive Turbo for Woodworking, Polishing, Carpentry
Best Orbital Sander
Bosch Power Tools Orbital Sander
  • 7,300 OPM rotating disc
  • 2-in-1 tool
  • Multiple grip positions
Product Image of the TACKLIFE 5-Inch Random Orbit Sander 3.0A with 12Pcs Sandpapers, 6 Variable Speed 6000-13000RPM Electric Sander, High Performance Dust Collection System, Sander for Woodworking - PRS01A
Best Budget Sander
TACKLIFE Random Orbital Sander
  • 6 adjustable speed
  • 13,000 OPM
  • 12-piece sandpaper set
Product Image of the Ingersoll Rand 311A 6-Inch Heavy-Duty Air Dual-Action Quiet Sander
Best Pneumatic Sander
Ingersoll Rand Heavy-Duty Air Sander
  • Has a built-in silencer
  • Balanced construction
  • Speed control regulator
Product Image of the Lagler Hummel 8 inch Belt Floor Sander
Best Floor Sander
Lagler Hummel Belt Floor Sander
  • 8-inch sanding belt
  • 3-stage pressure regulation
  • 30-year lifespan

Common Types of Sanders for Decks

There are many types of sanders available, but which ones are the best for reviving your deck? Let’s look at the 3 main types.

Belt Sander

Product Image of the Makita 9403 4' X 24' Belt Sander

The belt sander uses a continuous loop of abrasive paper to remove a substantial amount of material from your deck. It is the ideal tool to use, especially if the deck is a significant size. Belt sanders love flat surfaces, straight lines, and it is the perfect choice for reaching edges and corners.

Random Orbital Sander

Product Image of the Makita BO5030K 5' Random Orbit Sander, with Tool Case, Teal

Random sanders resemble orbital sander in every way. However, they operate in an entirely different way. The sanding pad sits on an off-set axis, which creates an oscillating motion, meaning the sander rotates and moves from side to side.

The key advantage of this is it increases the device’s efficiency and reduces swirl marks, leaving your deck looking smooth and unblemished.

Orbital Sander

Product Image of the Bosch Power Tools - GET75-6N - Electric Orbital Sander, Polisher - 7.5 Amp, Corded, 6'' Disc Size - features Two Sanding Modes: Random Orbit, Aggressive Turbo for Woodworking, Polishing, Carpentry

Orbital sanders are another great choice when sanding decks. They work differently from belt sanders because they rotate. The advantage of orbital sanders is they are more gentle, leaving less visible marks on the wood’s surface. The downside is they cover less ground, taking longer to finish the job.

How To Choose the Best Sanders for Decks

Finding the best sander for your dollars is a minefield, so knowing what to look for is crucial. Here are some pointers.

Dust Collection

Trust us when we say that dust is a real problem when sanding wood. The good news is that deck refinishing is an outdoor task, minimizing some of the harmful effects of hazardous dust.

However, you still need a sander with an adequate dust collection system. Some bag the debris ready to empty it when it gets full, while others attach it to a central hose and vacuum system for complete debris removal.

Variable Speed Settings

Variable speed may not be top of your priority list when sanding decking, but having the ability to change the speed the device moves gives you greater flexibility. You can select warp speed to cut through the grime and blemishes and then graduate to a more gentle rate.

When you are working near railings or corners, it might be better to dial down the speed because the faster you go, the less control you have.

How Loud Is It?

All sanders are noisy, but some are louder than others. Belt sanders create the most sound, but the others are hardly quiet. Invest in ear defenders, and remember that you probably have neighbors to consider.

Corded vs Corded

Corded

Corded sanders keep you working for longer without fretting about the state of the battery charge. Also, corded models are often lighter because there is no added battery weight.

And when the charge starts to dwindle on a cordless sander, you often experience a lag in performance. This doesn’t happen with a corded model. You get continuous power no matter how long you work. Plus, corded devices are often cheaper.

The downside is you are restricted to a power supply, or at best, an extension cord. When you consider that decks are in gardens you will need to organize a power supply to reach the work-site.

PROS:
  • Continuous power.
  • Cheaper.
  • Lighter.
  • No charge time.
  • No power lag.
CONS:
  • Requires a power supply.
  • Trailing leads.

Cordless

Cordless sanders allow you to work anywhere. This is ideal for outdoor use, like deck refinishing. If you get a cordless model, make sure you buy a spare battery. While you are using one cell, the other is there to take over when it loses charge.

Cordless models have a battery attached, which increases the weight and might cause more hand and wrist fatigue. The other disadvantage is the expense, not just for the bare tool but the spare batteries.

Try and get a model that includes at least one battery and a charger. Some only supply the tool itself and charge extra for the battery and charger. Also, keep in mind the charge time. Some models take longer than others.

PROS:
  • Go anywhere.
  • No power cords.
  • Latest motor technology.
  • Fast charge time.
  • Increased convenience.
CONS:
  • Expensive.
  • Inconvenient charge time.
  • Requires additional battery.

What’s Your Budget?

The budget is always a consideration, so whether you choose a cordless or corded model may depend on your cash flow. The more you spend, the better quality the tool and the more it can do. This is undoubtedly true in most cases.

However, the most expensive is not always attainable, so look for a mid-priced model with better quality components. Longevity is vital, especially if you want to save the cost of purchasing a new model every couple of years.


The Best Sanders for Decks of 2021

Here are our favorite sanders suitable for sanding decks.

1. Makita 9403 Belt Sander

Best Belt Sander for Decks

This Makita is a tough act to follow. Not only is it our pick for the best belt sander, but it also wins in the quietest stakes. It only generates 84 decibels, which is pretty good for a deck sander. The sanding belt measures 4 x 24 inches and runs at a speed of 1,640 feet per minute (FPM).

It has an innovative design that allows you to get close to the action at edges and corners, plus, it benefits from Labyrinth construction, which seals and protects the motor bearings from debris.

It is one of the best tools to use on large decks, with the 11-amp motor making light work of the surface and the large dust collection bag storing all the debris safely until it needs emptying.

Why We Love It

84 dB Operation

Sanders are noisy, that’s a fact, but this model operates at 84 decibels, which is a low volume for a sander. If you have close neighbors, this has to be a consideration.

11-Amp Motor

The powerful 11-amp motor generates an impressive 1,640 feet per minute for more effective removal of the surface material. If you have a larger surface area, this tool makes light work of the task.

Trusted Brand

Makita is famed across the globe as a maker of quality power tools, and this model is no exception. It is robust and constructed of the highest quality materials.

Keep In Mind

Very Expensive

It’s a Makita alright, and it isn’t cheap. If you want this tool, you’d better save your pennies or hope that it is on special offer. Failing that, dig deep to get it.

Additional Specs

Weight (pounds) 13
Dimensions (inches) 9 x 16.1 x 9.76
Amps/volts 11 amps
Speed (FPM/OPM) 1,640 FPM
Grit 80
Price $$$$$
Warranty 1-year

2. Makita BO5030K Random Orbital Sander

Best Random Orbital Sander for Decks

This is the second Makita sander to make the list. This model is a random orbital sander, meaning it rotates and moves side to side in a motion known as oscillation.

The 3-amp motor generates 12,000 orbits per minute (OPM), which is more than enough to remove material from the surface of your deck. It has a rubberized grip for control and grip, as well as reducing hand fatigue.

This model has oversized ball bearings for longevity and increased robustness. The sanding pads swap in super-quick time to keep you working and reduce downtime. You also get 8 dust extraction ports in the base of the disc to suck away dangerous debris.

Why We Love It

Random Motion

The sanding pad’s random action is more efficient than an orbital sander in that it removes more material with every surface contact. It also makes fewer marks, leaving your deck super-smooth.

12,000 Orbits Per Minute

The 3-amp motor produces 12,000 OPM. This is more than sufficient to strip a small to medium size deck with ease. It also makes a less visible impact on the wooden surface.

Ergonomic Grip

The rubberized palm grip presents a low vibration action. Reducing the vibration decreases hand and wrist fatigue to ensure longer operation time, and lowers the volume.

Keep In Mind

Smaller Decks Only

Unlike the belt sander, you might find this random orbital sander better suited to small to medium decks rather than substantial areas. You can sand significant decks but be prepared for the job to take longer.

Additional Specs

Weight (pounds) 2.87
Dimensions (inches) 15 x 7 x 10
Amps/volts 3 amps
Speed (FPM/OPM) 12,000 OPM
Grit Not stated
Price $$$
Warranty 1-year

3. DeWALT 20V MAX Orbital Sander

Best Cordless Sander for Decks

We had to include a DeWALT in the review. This cordless model is 20 volts maximum, has a textured rubber overmold grip and adjustable speed control for greater versatility. The speeds range from 8,000 to 12,000 OPM.

This model has the latest in brushed motor technology, which increases your runtime, extending the life of the lithium-ion battery (sold separately). It also has a one-handed locking dust bag, but you do get the option of attaching a vacuum hose to extract the dust to a central canister.

The main advantage of this tool is its go-anywhere ability. It is the perfect tool for outdoor jobs like deck sanding.

The major downside with this DeWALT is the batteries and charger cost extra. Remember to factor that in when making a purchase. The batteries will increase the cost-base considerably.

Why We Love It

Cordless Operation

Why suffer the hassle of plugging in an extension cord and trailing it across the lawn to reach your deck. A battery-operated sander is the best option for speed and convenience.

Variable Speed Control

The speed adjusts from 8,000 OPM to 12,000 OPM, giving you the ability to go crazy speed when it counts and moderate rates for detailed areas, which requires greater control.

Brushless Motor

Brushless motors are the latest in advanced motor technology. They are more efficient, preserving the life of the tool while at the same time increasing the capacity of the battery, extending the runtime.

Keep In Mind

Separate Battery and Charger

This cordless sander is sold as the bare tool only. If you want this model, you will need to allocate extra cash for the charger and battery. That makes this even more costly compared to the competition.

Additional Specs

Weight (pounds) 2.56
Dimensions (inches) 8.8 x 5.7 x 6.3
Amps/volts 20 volts
Speed (FPM/OPM) 8,000 to 12,000 OPM
Grit 60 to 80
Price $$$$
Warranty 3-year

4. Bosch Power Tools GET75-6N Orbital Sander

Best Orbital Sander for Decks

Global brands dominate this list, and this Bosch sander sticks to that theme. This is a unique sander because not only does it orbit, you get a second setting that allows you to switch it to a random motion.

For this reason, the speed is measured in RPM and OPM. The oscillation speed maxes out at 640 RPM, and the rotating disc reaches 7,300 OPM. And that’s not all because you get variable speed control with the lowest RPM setting at 290 and the slowest OPM coming in at 3,300.

Like DeWALT and Makita, Bosch has an enviable position in the world of power tools, so it is no surprise that we had to feature one of their sanders on the list.

Why We Love It

Adjustable Speed

You can change the RPM from 290 to 640, while at the same time, the OPM ranges from 3,300 to 7,300. It gives you the ultimate control when working on different materials and sections of your deck.

2-in-1 Tool

Switching from random motion to orbital action means you can adjust the sander to cater to speed, accuracy, and maximum material removal.

Multiple Grip Positions

This model has an auxiliary side handle for better grip and control, as well as a rubberized overmold grip for less hand and wrist fatigue.

Keep In Mind

Super Expensive

This model is almost 3 times as much as the DeWALT cordless model. Bosch products are good, but do they justify this price tag? Only you can decide that.

Additional Specs

Weight (pounds) 5.7
Dimensions (inches) 15 x 6.3 x 5.5
Amps/volts 7.5 amps
Speed (FPM/OPM) 290 to 640 RPM and 3,300 to 7,300 OPM
Grit 270
Price $$$$$
Warranty 1-year limited

5. TACKLIFE 5-Inch Random Orbital Sander

Best Budget Sander for Decks

If you want to save money on a sander, look no further than this TACKLIFE random orbital sander. It costs over 8 times less than the Bosch model, making it incredible value for money. So, how does it compare to the more expensive models?

It has 6 adjustable speeds, maxing out at 13,000 OPM, all courtesy of a 3-amp motor. The rubberized grip makes fatigue less likely and it gives you better grip and control. You even get 12 pieces of sandpaper, ranging in grit from 80 to 180.

Why We Love It

Adjustable Speed

Having the ability to set 6 speeds means you can have complete control of the sander for different materials and surfaces. Go fast when you need it, and reduce the pace for more detailed areas.

Budget Price

To get a sander for 8 times less than the most expensive models available is incredible. To get all of this at such a competitive price makes it the ideal sander for beginners and occasional users.

12-Piece Sandpaper Set

You can get started straight out of the box with this sander. With sandpaper grit ranging from 80 to 180, means you can work on almost any surface.

Keep In Mind

Cheaper Components

You cannot hide the fact that this sander is less robust compared to the bigger brand names. If you want something for occasional tasks, this is a good choice, but don’t expect it to last as long as more expensive models.

Additional Specs

Weight (pounds) 3.4
Dimensions (inches) 10.1 x 6.6 x 4.9
Amps/volts 3 amps
Speed (FPM/OPM) 13,000 OPM
Grit 80 to 180
Price $
Warranty 2-year

6. Ingersoll Rand 311A 6-Inch Heavy-Duty Air Sander

Best Pneumatic Sander for Decks

Pneumatic sanders are more powerful, and they generally have larger sanding pads for faster material removal. If you have a substantial deck, a pneumatic sander might be the best choice. We measure the effectiveness of air tools in CFM and pressure.

This Ingersoll Rand has a rating of 17 cubic feet per minute (CFM), which denotes the strength of the airflow. It also generates 12,000 RPM. If you want a low vibration model, this is the one.

It also has a lever throttle to reduce the pressure on your hands and wrists for less fatigue. The built-in silencer dampens the sander’s noise, and the swirl-free finish ensures the very best results.

The only downside with this tool is that it needs an air compressor to power it, which considerably ramps up the costs.

Why We Love It

Quiet Operation

This air tool comes with a built-in silencer that reduces the operating noise considerably. Unfortunately, it’s attached to a compressor that is far from quiet.

Balanced Construction

Your sander must be well balanced if you are to have total control over the way it operates. Balanced ball bearings give you that advantage, making it easier to manage at full speed.

Speed Control Regulator

The built-in speed control regulator ensures that you can change speeds to suit different surfaces and sections of your deck.

Keep In Mind

Needs an Air Compressor

Air tools need compressed air to operate. Air compressors are expensive bits of kit, so while this air sander is affordable, you can add a substantial sum to the overall cost to get you up and running.

Noisy Air Compressor

The air sander may have a sound dampener, but that doesn’t silence a noisy air compressor. If you have close neighbors, you might want to bear that in mind.

Additional Specs

Weight (pounds) 4.2
Dimensions (inches) 4.3 x 10.5 x 6.4
Amps/volts N/A
Speed (FPM/OPM) 12,000 RPM
Grit Not stated
Price $$
Warranty 1-year limited

7. Lagler Hummel 8-Inch Belt Floor Sander

Best Floor Sander for Decks

This floor belt sander is the ultimate fast stripping tool. It covers vast areas with ease, so if your deck covers a significant surface area, this sander will get the task done double-quick. It also works on parquet floors and floorboards.

Essentially, it is like a massive belt sander, but it covers much more distance, thanks to increased power and an 8-inch sanding belt. The combination of an aggressive drum, 3-stage pressure regulation, and an integrated belt tensioning system ensure optimum performance.

The downside with this tool is it is heavy, aggressive, and extremely expensive. It’s more of an industrial sander rather than a domestic machine.

Why We Love It

Covers Lots of Ground

You can get your deck sanded in no time at all with this machine. It’s aggressive, and thanks to the 8-inch belt, it smooths the roughest of surfaces.

Great Dust Collection

If you want the best possible dust collection capacity, this sander has it. The collection bag is enormous compared to a hand-held device. It means you spend more time sanding and less time emptying the bag.

Superior Material Removal

If you have a deck ravaged by the effects of winter, this device strips away the grime, mold and mildew in one sweep. Nothing is more effective.

30-Year Lifespan

The manufacturer claims that this floor sander will last for 30 years. It’s a robust machine that will outlast almost every other tool featured. You sure pay for it, but if you have the money, it’s nice to know.

Keep In Mind

So Expensive

We are not talking hundreds to buy this machine, but several thousand dollars. Unless you have a deck that needs that kind of investment, steer clear of this model.

Limited Use

What this does well is cover large areas, removing surface material quickly. That’s it. Unless you need it, go for a sander with a bit more versatility.

Additional Specs

Weight (pounds) 175
Dimensions (inches) Not stated
Amps/volts 230 volts
Speed (FPM/OPM) 2,400 RPM
Grit Not stated
Price $$$$$$
Warranty Not stated

Sanders For Deck Comparison Chart

Product Best Weight Dimensions Amps/volts Speed Grit Warranty
Makita 9403 Belt Sander Belt Sander 13 lbs 9 x 16.1 x 9.76″ 11 amps 1,640 FPM 80 1-year
Makita Random Orbital Sander Random Orbital Sander 3 lbs 15 x 7 x 10″ 3 amps 12,000 OPM N/A 1-year
DeWALT Orbital Sander Cordless Sander 3 lbs 8.8 x 5.7 x 6.3″ 20V 8,000 to 12,000 OPM 60 to 80 3-year
Bosch Power Tools Orbital Sander Orbital Sander 6 lbs 15 x 6.3 x 5.5″ 7.5 amps 290 to 640 RPM; 3,300 to 7,300 OPM 270 1-year limited
TACKLIFE Random Orbital Sander Budget Sander 3 lbs 10.1 x 6.6 x 4.9″ 3 amps 13,000 OPM 80 to 180 2-year
Ingersoll Rand Air Sander Pneumatic Sander 4.2 lbs 4.3 x 10.5 x 6.4″ N/A 12,000 RPM N/A 1-year limited
Lagler Hummel Belt Floor Sander Floor Sander 175 lbs N/A 230V 2,400 RPM N/A Not stated

What Sander Size Do I Need for My Deck?

The answer is, how big is your deck? Large surface areas require bigger sanders if you want the job done swiftly. A belt sander is by far the most popular choice, thanks to its ability to remove large amounts of material.

Belt sanders also have the most grunt, making grime and blemish removal a lot easier, speeding up the process. Orbital sanders are also effective, leaving fewer swirl marks and giving a smoother finish. However, using an orbital sander does take longer to complete the task.

FAQs

How Can I Sand My Deck Fast?

Start with the preparation. The more nails and sharp edges you remove from the deck before sanding, the faster you will get the task done. Use a belt sander, starting with an 80-grit paper, and graduate to a finer grade as you go.

You could also use a drum sander, which is a floor-standing device that looks like a lawnmower. It makes light work of large surfaces but is a bit on the crude side when it comes to detail sanding.

Should You Sand Your Deck Before Staining?

If you want the best result, you should. Sanding removes blemishes and sharp edges that result in a poor finish. Also, winter brings damp conditions, increasing fungus and mildew growth.

Wet decks are incredibly slippery, so the only way to stop potential injuries is to sand and stain.

Do I Need To Remove Old Stain Before Restaining a Deck?

It depends on the state of your old stain and the surface of the wooden boards. Some oils soak into the fibers of the wood to offer deep protection of the material, with a simple touch-up necessary every season.

For the best results, sanding is always the best policy.

Do I Need To Sand a Deck Before Oiling?

Ideally, you should always sand the deck before applying any new oil-based preserver. It gives the best results and provides the neatest finish.

Should I Sand My Cedar Deck Before Staining?

Cedar, along with any other wood type, benefits from sanding before applying a stain. Removing old layers helps to protect the wood and allows the new layers to bond properly. You wouldn’t paint onto an old flaking surface without first stripping away the old layer, so staining your deck is the same.


Love Your Deck

More than any other wooden surface in your home, the garden decking gets the most punishment. Is it any wonder that every season, after the winter, you should consider sanding away the grime and dirt from the surface.

If you want your deck to last and look good for years to come, think about a maintenance schedule and invest in a sander.

Headshot of mark

About the Author

Mark Weir

Mark spent 24 years working in real estate, so he knows his way around a home. He also worked with contractors and experts, advising them on issues of planning, investments, and renovations. Mark is no stranger to hands-on experience, having renovated his own home and many properties for resale. He likes nothing better than seeing a project through to completion.
When To Use a Belt and Orbital Sander

Belt Sander vs. Orbital Sander: What's the Difference?

Carpenter works with belt sander for woodworking

Best Belt Sanders of 2021

Various types of benchtop sanders

Best Benchtop Sanders of 2021

Sanding wooden stool with a detail sander

7 Best Detail Sanders (2021 Reviews)

Woman restoring an old, damaged dresser

How to Refinish Furniture (Make It Look New Again)

Sanding wood

How To Sand Wood (Sanding Tips)

Leave a Comment