How To Insulate Your Hot Tub

This step-by-step how-to guide explains how to insulate your hot tub with the help of the Hot Tub Insulation Kit we have put together.

The Hot Tub Insulation Kit is designed to save and preserve energy when running your hot tub, so less energy is required to maintain the desired temperature.

Ecohome Insulation are the leading UK & European distributor of Multifoil Insulation products. We offer free next working day delivery to the UK Mainland (order before 2pm).

Working Out How Much Insulation You Will Need

This may be easier with two people — measuring the edges with someone to hold the tape in place helps. If your hot tub is round, simply measure the circumference. If you have a square hot tub, measure one side and multiply by 4. If you have a rectangular hot tub, measure the shorter side and multiply by 2, then measure the longer side and multiply by 2, and add the two figures together. Note your measurements down in preparation for cutting.

Top tip: if you have a sewing/fabric tape measure, this will make this step easier for round hot tubs.

Measure the Height of Your Hot Tub

Checking the height of your hot tub at this point is important — it shouldn't exceed 1.2m, but if it does, contact us. Even the tallest hot tubs tend to be no higher than 100cm (1m); it's likely your tub will range between 70cm and 100cm.

Cutting the Multifoil Insulation to the Correct Length

Looking at the perimeter measurement taken in Step 1, add 70mm to this figure. Roll the insulation out and prepare to cut.

Top tip: pull the insulation taut prior to cutting with the multifoil insulation scissors — this compresses the layers and makes it easier to cut through. A cutting knife can be used instead, as long as the insulation is taut and compressed beforehand.

Removing the Side Panels of the Hot Tub

This process may vary depending on the type of hot tub you have, but you are likely to need a screwdriver for this stage. Your hot tub is likely to have screws on or around each of the corners of the panels. If you can remove the side panels without removing the corner panels, this is ideal.

Do not remove the corner panels unless you have to, in order to release the main side panels.

Start Installing the Multifoil

Now you can start installing the multifoil insulation. Begin by tucking the multifoil behind the corner panel or strip — this helps secure the insulation in place while you get started. Tuck the material in at the top and bottom edges to minimise heat escaping and cold air entering, and repeat this around the perimeter of the hot tub.

Cut the Multifoil Where Necessary

For most applications we advise keeping the multifoil in a continuous layer, but for a hot tub there are certain parts — such as the control panel and pipework — that you'll need to leave accessible and exposed. Simply cut around these areas with the scissors provided.

Be careful not to cut anything other than the multifoil insulation.

Finishing Insulating

Once you have insulated around the whole perimeter of the hot tub (excluding the areas cut), you should have a little excess insulation, which you can use to overlap slightly in preparation for taping.

Taping Around Joints and Edges

Using ThermaSeal Foil Joining Tape, begin by taping where you have just overlapped the insulation. You can then tape and seal around any edges where air may pass in or out.

The aim is to keep the multifoil in as continuous a layer as possible, so tape over any area where warm air may escape or cold air may enter.

Reassemble Your Hot Tub, Relax and Enjoy

Once all taping has been completed, reattach your side panels, ensuring they are securely screwed on as before. Then you can enjoy your newly insulated hot tub — relax in it for longer, safe in the knowledge you're using a lot less energy than before.

Disclaimer – Ecohome Insulation cannot be held responsible for any losses financially or physically from advice provided in this How-To-Guide.