Readers ask: How To Pour A Concrete Slab For A Hot Tub?

How thick should a concrete slab be to hold a hot tub?

Concrete Slab



The base of reinforced concrete should be about 4 inches thick and be able to withstand a weight of at least 115 pounds per square foot, especially for larger spas. The concrete should be fully cured prior to placing the tub.

How much does it cost to pour a concrete slab for a hot tub?

A concrete slab costs $5 to $10 per square foot or between $500 and $2,500 for a hot tub. Other options for a hot tub foundation pad are an existing patio, gravel base, pavers, reinforced deck, or plastic spa pad.

Can you put a hot tub on a concrete slab?

Hot tubs do not have to sit on concrete. They can be placed on wooden decks, paver stones, gravel beds, or spa pads. Just don’t place a hot tub directly on the ground or on a wooden deck that was not built to support the weight of a fully-loaded hot tub.

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Do I need gravel under my concrete slab?

Because concrete is a very porous material, it will absorb any moisture that it contacts. This can cause pooling. Without crushed stone, pooling water will settle under it and erode your slab. Adding a layer of crushed stone will add proper drainage, as well as create a barrier between your slab and the ground.

Do you need rebar for 4 inch slab?

No, you do not need rebar for a 4inch slab of concrete on grade. A 4inch-thick slab cast on the ground and in permanent contact with it will float and rebar is not required. Rebar is recommended on concrete measuring 5 – 6 inches thick.

Does a hot tub pad need rebar?

Some concrete contractors say no mesh or rebar is necessary, others say mesh is enough, and others recommend the rebar which provides the most strength.

Does hot tub wiring need to be buried?

Q: Does Hot Tub Wiring Need to Be Buried? A: Burying the wires that run from the electrical breaker panel to your spa panel and from the spa panel to your spa is important. However, for your safety, you should avoid running the wires under your hot tub.

What’s the difference between a concrete slab and a cement slab?

What is the difference between cement and concrete? Although the terms cement and concrete often are used interchangeably, cement is actually an ingredient of concrete. Concrete is a mixture of aggregates and paste. The aggregates are sand and gravel or crushed stone; the paste is water and portland cement.

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What is the best base to put a hot tub on?

Above Ground – New Base



If you’re having a base installed especially for your Hot Tub we would recommend a patio, decking area or poured concrete base. Whatever you choose make sure whoever installs it for you ensures the base is level and large enough for your Hot Tub and steps.

How far does hot tub have to be from house?

In some areas, including Minnesota and California, you must set the tub back at least 5 feet from your property line. For an above-ground hot tub, measure from your property line to the edge of the tub’s structure. If your hot tub will have its top flush with the ground, measure the tub as you would a swimming pool.

What is best to put under a hot tub?

Now that you know why it’s so important to give your hot tub a base, let’s look at four of the best base and foundation ideas.

  • Gravel. With its low cost and ability to provide constant drainage, gravel is a popular choice with many hot tub owners.
  • Concrete/Cement.
  • Decking.
  • Pre-Made Base.

When can I put hot tub on concrete?

The concrete people said I need to wait a week at least before putting a hot tub on it. They said one week is the MINIMUM; they said it takes up to 28 days for the concrete to completely cure, so they recommend 28 days before putting something really heavy (like a hot tub) on it.

How long does it take concrete to cure a hot tub?

In fact, the chemical reaction between cement and water that binds sand and gravel together to make concrete takes nearly 28 days to fully complete. During this process, which is known as hydration, you want to keep moisture in the concrete.

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