Have you always dreamed of owning a deck with a luxurious hot tub? First, you need to see if your deck can handle such a massive expansion – in this blog post, we will explore the different options you have for a spa installation.
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Before you continue, it is essential to note that adding a spa to your patio is probably not the kind of project you want to do. Instead, we recommend a combination of careful planning and the help of qualified professionals. The last thing you want is for your deck to collapse under the weight of a hot tub over 1,000 pounds!
In a nutshell
Yes, you can put a hot tub on a deck. Decks built up to 2 feet above the ground can support 9,3 pounds per square foot, enough for most hot tubs. Most hot tubs can do that. But for decks 2 feet or higher, you will need additional support. The extra support piles should be no more than 30″ from each other and ideally be set in cast concrete.
Find out how much deck support you need
As a general rule of thumb, if you have a deck that is only a few meters or less high, it can carry about 100 pounds per square meter. So if the spa weighs less than 100 pounds per square foot, you probably don’t need to worry. However, a professional contractor or qualified representative should always inspect your deck to determine if your deck can handle the spa. If this is not the case, there are often ways to correct this, such as adding extra support beams below the deck.
To determine the structural support your spa needs, you need to calculate the load value. This can be done by adding the weight of the empty spa plus the water capacity plus the importance of the maximum number of occupants. (For water capacity, 1 gallon of water is about 8.34 pounds, an average weight of 180 pounds per person).
For example, a 4-person, 42 square foot, 278-gallon hot tub filled with water and floats would weigh about 3,710 pounds. The weight would then have to be divided by the spa’s square foot to determine the load that the deck frame would be able to support, which would be 88.33 pounds per square foot.
In many cases, a structural engineer is consulted, and most municipalities require a technical design.
When determining the deck’s location, you should also consider some other factors that may affect your enjoyment of it. These include the wind conditions in the area, the proximity of deciduous trees and shrubs, the amount of sunlight, the space for covering the hot tub, and accessibility and privacy.
Now you know how to determine if your deck can support a hot tub. Download a guide for hot tub buyers to learn more about our models.
Can your deck carry a hot tub?
Can you carry a hot tub on your wooden deck? Probably it can! But if your deck is older or in poor condition, you may have problems. However, you can take steps to reinforce your structure to ensure the strength of your deck.
For example, you can add extra bracing around the location of the spa. Even an extra beam or support post cannot cause damage.