How to Level a Hot Tub on Uneven Concrete

You can level a hot tub on uneven concrete or carpeting.
Step 1: Lay out cones, stakes and tape measure where the top of the spas will be placed. You’ll want to make sure you’re within about 6-8 inches from each other all around so that your spa is centered.,
Step 2: Level your old pool table according to how much water it takes up with asphalt shims and some felt pads before stepping back once again (6-8″). Make sure both sides are equal in height.,
Step 3: Add sandbags behind the edge of one side until its just slightly lower than the other side’s bottom edge then put down extra felt pads underneath that first layer for extra protection between steps 4 & 5.,
Step 4: Waterproof patch any cracks in tile or cement, lay out thick layers of blue painter’s tarp plastic over tack strips as needed; ensure edges are sealed well to avoid leaks when pressure is applied. Place an additional layer if desired beneath this covering.; add dirt mix under these patches using a shovel while keeping them flat along floor surface and ensuring they don’t touch surrounding surfaces.; attach rubber mat below patio coverings once completed.

The “hot tub leveling shims” are small pieces of metal that can be placed under the bottom of a hot tub to level it on uneven concrete.

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Are you seeking for a technique to level a hot tub on a concrete slab that is uneven? Nobody wants to be partly submerged on one end and completely dry on the other.

If the slope is less than one inch, simple shims may be used to level a hot tub on uneven concrete. For steeper slopes, more complicated alternatives such as custom-built wood pads, sand or gravel, or even a new concrete pad would be required. 

We’ve already written about how to level a hot tub on gravel. However, if your hot tub is placed on top of an existing concrete surface, you may see that the concrete is uneven due to drainage or faulty construction. Whatever the situation may be, keep reading for some helpful hints on leveling your hot tub on an uneven floor.


Contents Table of Contents

  • Use Shims Made of Plastic
  • Use a Platform and Wooden Shims.
  • Invest in a Spa Leveler.
  • Construct a Raised Pad
  • a new concrete pad is poured
  • Last Thoughts 


Use Shims Made of Plastic

Consider using heavy-duty plastic shims to lift the low end of your hot tub if it’s off by an inch or less. These load-bearing shims are a cost-effective method to level a hot tub that is slightly off-kilter.

Make careful to read the manufacturer’s instructions on how to use shims properly in your hot tub. By shimming the tub improperly, you run the risk of cracking it. Furthermore, some manufacturers do not advocate shims at all; using them might violate your tub’s warranty.

Begin by tapping in shims on the lowest side of an empty tub (less weight to cope with). Place shims over the low side at regular intervals to give uniform support for the tub’s entire weight.

Use a Platform and Wooden Shims.

You can make your own shims and a platform out of pressure-treated timber for slopes of about an inch or two. After you’ve moved the tub out of the way, take pressure-treated 2x4s and a piece of exterior-grade plywood and:


  1. Depending on your slope, cut the 2x4s into wedge-shaped pieces.
  2. Place them every foot or so across the tub base’s low end.
  3. Cut exterior quality plywood and screw it on the wood shims.
  4. Place the tub on a new, level platform.

Consider adding a spa pad, such as an E-Z pad, to your platform for increased stability. These hot tub cushions are specifically intended for use with hot tubs and come with a lifetime warranty. 

They’re constructed of heavy-duty plastic and can be lifted up and relocated if your hot tub has to be moved. (Your platform must be totally level for the greatest results.) E-Z pads may be utilized on any level surface by itself.

Invest in a Spa Leveler.

A spa leveler may be used for any hot tub that is out of level, but it is most useful when the uneven slope is larger than an inch. Several adjustable feet enable you to change the height of the spa leveler to fit the slope you’re working with.

If your hot tub is already set up, move it to the side to make room for the spa leveler. Before reinstalling the hot tub on the new leveler, you’ll need to know how much off of level your concrete pad is so you can adjust the feet properly.  

While a spa leveler is an expensive alternative, costing about $600 plus delivery, it is built to endure. The tub’s shape enables water to flow away from the bottom, preventing wood rot and mildew.

Its mobility is an additional bonus. If you ever need to transfer your hot tub, a spa leveler may be moved and then re-calibrated to the contours of the new location by simply adjusting the feet.

Construct a Raised Pad

What can you do if your hot tub is more than an inch off the ground and you don’t want to blow your Christmas budget on a spa leveler or a new concrete pad? Build your own leveler if you want to save money. A sturdy platform for your hot tub is a raised pad made of wood and filled with sand or gravel.

If you want to build a custom raised pad yourself, you’ll need some carpentry skills and tools. If the concept makes you cringe, finding a local handyman that can perform the task for you at a fair price should be straightforward.

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How to Make a Hand-Made Pad

You’ll construct a box frame out of timber and fill it with gravel to make a level surface for your hot tub in order to achieve this lovely, new, and level spa pad. The term “custom-built” refers to just that. To begin, you’ll need to figure out a few important numbers:

  • Slope measurement: how far is your present concrete pad from level?
  • 24 pressure-treated timber and screws are required for framing.
  • The amount of sand or gravel that will be required to fill the frame

Make a Box

Using the 2×4 lumber, Make a Box frame that is approximately one inch wider than your hot tub base. Each piece of wood should be ripped and tapered on the bottom so that when the entire box is built and placed on the uneven surface, the top boards are level all the way around.

  • Pro Tip #1: Use pressure-treated timber to guarantee that your new pad can withstand the elements and any dampness in the area surrounding the hot tub.
  • Pro Tip # 2: Drill many holes along the long (and lower) edge of the lowest board; this will enable any water that spills out of the tub or collects in puddles after a storm to drain into the gravel or sand. 

Gravel or sand should be used to fill the box.

Fill the box with enough pea gravel or sand to reach within an inch of the top after it’s been made and fitted to the sloping concrete; this will provide you a stable platform to place the hot tub on.

Cement is a different and optional filler for your custom-built frame box. However, since this is a more permanent solution, you should be certain that you will never wish to relocate the hot tub before selecting this choice. 

Make your own concrete by purchasing bags of cement from a home improvement shop. Before reinstalling your hot tub on the new pad, mix and pour the mixture into the frame, then allow it to dry as indicated. 

The Wood Should Be Painted or Stain

You may paint or stain your new hot tub pad to match your tub foundation if you want it to seem completed. It’s not required, but it helps give your website a more professional, personalised look. One advantage of painting or staining the wood is that it will be protected from the elements in addition to being pressure-treated.  

a new concrete pad is poured

Consider having a new, level concrete pad poured if all else fails and you’re simply not happy with alternative leveling choices. It may be put on top of the existing pad to provide additional stability for the hot tub. 

Alternatively, it’s the ideal opportunity to move your hot tub to that area in the yard where you’ve always wanted to put it. Pouring concrete is a costly proposition in any case, but it may be worthwhile in the long term. To find out how much concrete mixing costs in your region, contact a local concrete mixing factory.

Last Thoughts 

It is advised that a hot tub be leveled on uneven concrete to maintain the tub’s integrity and the users’ safety. Depending on the degree of the tilt and your comfort level with DIY projects, there are numerous options.

Whether you shim it up, construct a new pad, or buy a prefabricated leveler, you’ll be soaking in your perfectly level hot tub in no time. 


The “hot tub on sloping patio” is a question that has been asked before. The best way to level the hot tub is by using a pool skimmer or a flat piece of wood.

Frequently Asked Questions

How do you level a hot tub on sloped concrete?

A: If you are looking to level a hot tub on sloped concrete, build up the sides of the pool using bricks or other stones.

What happens if hot tub is not level?

A: If the hot tub is not level, then it will cause excessive water to leak into your home. This can lead to a big mess and damage that you may have otherwise been able to avoid by simply leveling the tub before installation.

How do I level my hot tub?

A: The best way to level your hot tub is when its in use. To do this, you should fill the hot tub with water and add a little bit of soap while shampooing before filling up the rest of the tub.

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