How to Build the Base of a Hot Tub Gazebo

What You'll Need
Drawing paper
Draftsmans equipment
Surveying tape
Compactor or vibrating roller
Steel reinforcing grids
Timber for shuttering
Hammer and nails
Hose pipe
Safety goggles
Work gloves

A hot tub gazebo requires careful designing and planning to ensure that there is sufficient space and strength to enclose and support the hot tub. There are several factors that need to be considered before any decisions can be made to build the base.

Step 1 – Decide the Location

The location of the hot tub gazebo is the first consideration. You must find a location that offers an amount of space that is sufficient for the size of gazebo you want.

Step 2 – Qualities of the Location

As well as the necessary space, the location of your gazebo must also offer a degree of security. The ground must be tested with probes to ensure that it will support the weight of a full hot tub.

Check on any natural drainage lines to ensure you don’t create a problem by blocking them. If the site you have chosen does not have adequate drainage you need to plan to have that installed.

Step 3 – Design the Gazebo

Now that you have the location, you can decide the shape and final size of the gazebo. The position of the hot tub within the gazebo should be designed so that it will accommodate the weight. The type of hot tub now can be finalized. A sunken hot tub requires a radically different foundation than an above ground hot tub.  

Step 4 – Plan the Utilities Supplies

The hot tub will require an electricity supply and a water supply. Although these should not be built in to the foundation, it is possible that the drainage for the hot tub could be.

Step 5 – The Final Plan

The base of the gazebo, which is also the foundation for the hot tub, will be made with poured concrete for strength. Using the design, you can now design and cut the shuttering necessary to contain the concrete.

Step 6 – Excavate

At the location for the gazebo clear the site and dig down to a firm surface. If necessary you can use a compactor or a vibrating roller to create the firm surface.

Step 7 – Build the Shuttering

Making sure that it is aligned properly, build the shuttering on to the surface. Use stakes to hold the shuttering in place and nail the shuttering together. Make sure that there are no gaps at the bottom of the shuttering for the concrete to escape through.   

Step 8 – Check the Shuttering Profile

Make a final check that the shuttering is in the correct location and that it has been built with a horizontal profile from all sides. Install steel reinforcing grids.

Step 9 – Pour the Concrete

If possible the concrete for the foundation should be poured in bulk so that there are no seams in the mix or variable mix qualities. Use a vibrator to remove air bubbles (it may be necessary to keep a sample of the concrete for testing).

Allow the foundation to dry for a minimum of two days, spraying it with water occasionally.