How to measure a new hot tub cover

new hot tub cover

Is your hot tub cover damaged?

About 60% of hot tub heat is lost through the surface of the water. So a hot tub cover is essential for insulation and keeping running costs low. Usually you will get a insulated cover with the hot tub as standard.

If the hot tub cover gets damaged, it can start to take on water. When this happens the hot tub cover is no longer efficient at keeping the heat in. And you may need to buy a replacement. 

We want the hot tub cover to fit as well as possible, to ensure it efficiently insulates the hot tub cover. A cover that is too small or too large may let heat out.

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The easiest way to get a new hot tub cover

The easiest way to get a new hot tub cover is to go through your original supplier. If you give them the make, model and serial number they will be able to find the exact fit and order it through the original manufacturer. This will enable you to get an exact fit hot tub cover without having to measure anything.

If you can’t go through the original supplier. Or, if you don’t want to. Then you will need to measure the hot tub.


How to measure a new hot tub cover

If you can’t get your hot tub cover from the original supplier, then you will usually need to get a custom made cover. As it’s custom made it will be non-refundable. So you need to make sure that you take the measurements properly so that it fits well and insulates the hot tub.

Most hot tubs aren’t a perfect square. They usually have rounded corners so you need to take that into consideration and measure these too. 

PRO TIP: Measure for the cover from the hot tub itself. Rather than the old cover. As the cover can warp over time with moisture and wear and tear.

To make sure you measure everything you need to, download our hot tub cover measurements guide. Then once you’ve done, go ahead and sent it to us so we can order your custom made cover.

  • Hot tub cover length 

Measure across the longest side of your hot tub. Measure only the acrylic shell section “lip to lip”. If the cabinet extends further than the acrylic shell, do not include this in the measurement.

Take this measurement in two places to make sure the hot tub is straight. If one of the measurements is bigger than the other use that one. 
Add 1″ to this measurement to give you a 1/2″ on each side leeway. 
  • Hot tub cover width
 Measure the shorter side (if there is one) in the same way. Measure only the acrylic shell section “lip to lip”. If the cabinet extends further than the acrylic shell, do not include this in the measurement.
Again, add 1″ to this measurement to give you a 1/2″ on each side leeway. 
  • Hot tub cover corner radius
hot tub cover radiusHot tub covers usually have rounded edges. So we need to measure the radius of these edges to ensure the corners fit.

The easiest way to do this is using a carpenters square. The measurement comes from the point of intersection to the point where the framing square meets the hot tub.

If you need to round, round down. A smaller number represents a larger corner. So rounding down will ensure you have enough room in the cover to fit the corner. 
  • Hot tub cover skirt
The skirt is the section that extends beyond the foam cover. It needs to be long enough to help seal the hot tub cover and retain heat. But, you don’t want it to be too long.

The best way is to measure the length on the old hot tub cover skirt. Measure from the seam to the end of the skirt. If you don’t have the old cover, lay something flat across the top of the hot tub. Measure from the bottom of the flat item, to the end of the acrylic. 

The standard skirt length is approx. 10-15cm (4-5.5″). This may need to be reduced if you have a sunken/semi-sunken hot tub as you don’t want the skirt to be too long and bunch around the ground. 
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How long is the lead time on a custom made cover

If you are ordering a cover directly from the manufacturer then hopefully it will be in stock. However, if it’s coming from the US or Canada, it can take up to 12 weeks for a cover to be made a shipped.
A custom made cover usually takes about 4-6 weeks to make and ship.
It is unusual for suppliers to stock large amounts of covers as there are so many variations. You may be lucky, and find one in stock. But otherwise we recommend that you plan in advance. And don’t leave your replacement cover til the last minute as you may have to wait a while to get one that fits. 

How much does a new hot tub cover cost?

It depends what cover you have, but the average price for a custom built cover is:
Cover Insulation thickness Price (inc. VAT)
Select 4"-2" £582
Premium 5"-3" £609
Ultimate 6"-4" £636

Specialist covers with speaker humps or curved sides etc. or from specific manufacturers may cost you more. But this is what we charge for the average custom made cover.

How to stop your hot tub cover from getting damaged

Hot tub cover help insulate the hot tub and keep running costs low. If they start to take on water over time, they become very ineffective at insulating the hot tub and you will notice a rise in running costs.

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The best way to stop your hot tub cover from getting damaged is to install a hot tub cover lift. This stops the cover from being dragged off the hot tub when it’s in use. 

We install a cover lift on every hot tub we install to give the cover the best chance of a long life.

You should also balance your hot tub water. High levels of Chlorine or unbalanced pH can damage the cover and destroy the protective membrane on the cover. 

In summary

Hot tub covers are an essential part of your tub to help insulate and keep running costs low.

If you notice wear and tear or damage to the hot tub cover it is recommended that you replace it. 

While the initial cost can be quite high, in the long run it will massively reduce your running costs. 

You will want to make sure you measure the hot tub cover perfectly as they are usually custom made and non-refundable. 

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Debbie Ekins
Debbie Ekins
Eagle Leisure - Sales & Marketing Manager Mission = to arm you with the knowledge you need to make the best buying decisions. Fuelled by coffee (and naps). Explorer of Scotland and the world.