How Much Level Does a Hot Tub Need to be? – 3 Steps to Follow While Leveling Hot Tub


how much level does a hot tub need to be

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If you have recently purchased a new hot tub and are about to install it in your backyard then you certainly need to pay full attention to what I am about to say in this article.

Before installing your new hot tub, you must plan in advance about how much leveled the hot tub needs to be.

Your hot tub needs to be on a leveled surface since it’s going to be holding a lot of weight from its users including the extra weight from the water inside it.

The usual hot tub can weigh more than 7,000 pounds.

Setting the hot tub on a leveled surface will save the wood frame or acrylic shell from cracking and getting damaged.

You may not necessarily need to set your hot tub to be perfectly leveled down to the millimeter, but it is safer to be leveled to an extent.

You can comfortably place the hot tub on a deck surface or on your patio made with brick or concrete, or on any uniformly leveled surface.

However, it must not to be installed on bare ground or directly on the grass because of its uneven and delicate nature.

You can dig up the grass to level and use gravel as the support base.

You can also use pavers on top of the grass instead.

But if you’re going to be installing the hot tub above the ground, a paver-type base would work fine.

You know that there are weather effects in our areas with high freezing temperatures.

There is also the water that accumulates underneath the base of your hot tub which can shift the hot tub support structure and can cause damage to your hot tub.

This is why, I strongly recommend to install a leveled concrete pad by performing the following steps.

Step 1: Dig below the required base level at about 8-12 inches and level the ground.

Step 2: Then install crushed stones at 4-6 inches.

Step 3: Finally, install poured concrete at the same level and complete the leveling using a broom-type finish.

The concrete pad should be 3 feet higher than the tub on the side with the step and about 6 inches higher on the other 3 sides.

To ensure your hot tub is properly leveled, you should request recommendations for experienced hot tub contractors from your local hot tub dealers.

Can a Hot Tub be on a Slight Slope?

My answer is Yes and No both.

Actually, a slightly sloped surface for your hot tub is not a bad idea because it doesn’t stop the tub from working efficiently.

Hot tubs are mostly installed on a slightly sloped surface for drainage purposes.

It also helps prevent water from pooling up underneath the hot tub.

When planning for a hot tub in your landscape, I would highly recommend you to avoid installing a hot tub in areas that may allow water to excessively get to your hot tub.

Those areas can be a pit or low areas, sprinklers, a roof edge without a rain duct or channel, etc.

Instead, you can choose a site that allows proper drainage of water away from the hot tub.

A flat surface that is considerably level is the best place to install your hot tub and the maximum slope recommended for a hot tub is ½” – 1″ slope per 8″ run.

If the slope is greater than 1 inch, it’s best to move the hot tub and find a solution to level it to the right slope.

However, ensure that the hot tub foundation is capable of supporting the weight of the hot tub (that includes the weight filled with water, plus the weight of the people using it).

How Much Slope is Too Much for a Hot Tub?

There should be minimum slope of ⅛” and a maximum slope of ⅝” or less for proper hot tub leveling.

However, the standard slope for a patio is ½” per foot.

For crushed rock, a maximum of 1.5″ or less is recommended.

If you’re going to be pouring a cement slab, a slight slope of 1.5cm per 3.5m is recommended.

In this case, you will need to use a 10cm thick cement pad for proper leveling of your hot tub.

Bricks or blocks pad do not necessarily need a slope since water can drain out from in between the block/brick.

Recommended Articles for You:

Follow These 5 Steps to Properly Level Your Hot Tub on the Patio

6 Tips to Follow While Putting Hot Tub on the Deck

Is It Okay to Use Shims to Level Your Hot Tub? – Here is My Answer

How Level Should a Slab be for a Hot Tub?

Before considering your choice of hot tub, decide on where to set the hot tub.

Begin with a proper foundation that will give your hot tub a good start for sure.

If you’re going to use an existing surface, ensure that it is leveled properly.

A flat, smooth surface without grades is perfect for this task.

A multiple block slab is appropriate but for more durability, a single slab will work out much better.

Many patios, however, are sloped to help with drainage.

Avoid using shims to level your hot tub if you’re not sure they will be suitable for it.

Because they may create tension on the hot tub shell which may result in damage to your tub.

If your hot tub needs to be leveled, then make sure that the entire structure is fully supported which includes the center as well as the exterior edge.

How Flat Should a Hot Tub be?

Typically, when leveling a hot tub, it is required that the surface be a flat one and that water can easily flow away from the tub.

With the help of a flat, stable, and consistent subsurface as a support for the hot tub foundation, any serious damage to the hot tub can be prevented.

You can decide to place your hot tub on any surface of your choice.

However, you should understand that certain hot tub surfaces have both positive and negative effects including some factors that need to be considered.

A surface with good drainage is generally considered to be relatively flat and as long as it can hold the weight of a full hot tub, then it is suitable.

How to Level a Hot Tub on Uneven Surface?

If your hot tub is on an uneven surface, you can simply level it with the help of right types of shims if the slope is less than 1-inch.

Steeper slopes will require you to build custom pads of wood, use gravel, or even create a new concrete pad.

You may find that the existing surfaces where your hot tub is situated are somewhat uneven/unleveled to help with drainage.

Whichever case, you can easily fix the situation by following the below mentioned steps:

Step 1: Use durable plastic shims such as EZ Heavy Duty Plastic Shims to level the hot tub by raising the low ends.

Step 2: Set the tub to your desired level with a spa leveler, if the tub is out of level by any measurement.

Hot tub leveler, however, is better used on uneven slopes of more than 1-inch.

Step 3: Using pressure-treated lumber you can build your shims and platform and level the hot tub if the slope is one inch or so.  

Step 4: Another alternative to consider if the slope is greater than one inch and your budget can’t afford a spa leveler is to build a raised pad.

I recommend following these steps if you want to properly setup your hot tub on little high sloped surfaces.


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