Hot Tub Cover Measuring Tips

When measuring your hot tub or spa for a new cover, there is one important thing to remember: IT HAS TO BE LARGE ENOUGH TO FIT! We can make you a cover in one of two styles. The most popular style is to cover only the acrylic shell.   See measurement C in the diagram below.

If you have a spa that resembles the diagram below (right side), with a wood edge on the outside of the acrylic shell, and would like your new lid to cover both the shell and the wood lip, MEASURE FROM THE OUTSIDE OF THE WOOD SKIRT (D “Cabinet Size”).

There is no difference in spa cover performance either way. It is simply your preference.

All Diagrams & Measurements Listed Below are for Standard Cover Sizes!

 

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C – Outside Dimension of Acrylic Shell

D – Outside Dimension of Wood Cabinet

S – Height of the Acrylic Lip.  This determines the cover’s skirt length.

 

Lip Over Design              Deck Style

S – The height of the acrylic lip determines the cover’s skirt length. “Cabinet Size” covers may require a longer skirt that reaches to the bottom of the deck.

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Some covers have rounded corners. The diagram above shows a rounded corner with imaginary dotted red lines. The length of the red line represents the measurement of the radius corner.

The lines start where the cover begins to curve, and end where they cross. Be sure to measure all corners and that they are ALL the same size! IMPORTANT: If in doubt, a slightly smaller radius will slightly over hang the spa while a larger radius will not cover the spa completely.

There are numerous ways one may go about measuring the radius of a rounded corner, but these are the easiest we have found so far.

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METHOD #1

If your existing cover fits properly, set it upside-down on top of a piece of newspaper. Line up the edges of the newspaper with the edges of the cover.

The distance from the corner of the newspaper, to where the cover completely covers the paper is the radius of the corner.

 

 


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METHOD #2

You can also use a framing square to measure the radius of your spa corners. Set the square against the edge of the spa as shown below.

The radius of the rounded corner is the distance from the inside corner of the square, to where the cover just touches the square.

 

 

 

measure7This diagram to the right shows the pitfalls with miss-measuring a rounded corner. The green line represents a measurement of too large a radius, while the red line represents a measurement too small.

As you can see, with too large a radius the cover wont completely cover the spa. Too small a radius and the cover simply overhangs a bit.

If in doubt always go with a slightly smaller measurement. The cover may be slightly large and overhang the corner a bit, but it will cover the entire spa…… and no one but you will ever know.

 

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Some covers have cut-corners. The diagram above shows a cut corner with the length of the red line representing the measurement of the cut-corner.

Be sure to measure all corners and that they are ALL the same size! Some covers have different cuts.

Important Tip – If in doubt, a slightly smaller cut-corner will cause the cover to slightly over hang the spa while a larger cut won’t cover the spa entirely.
One of the more difficult things is trying to measure a diagonally cut-corner when the corner is also rounded. There are numerous way one my go about figuring this measurement, but this is the easiest we have found so far.

 

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Using masking tape, simply extend the lines of your spa (or existing cover) as shown below.

Where the tape crosses is where you want to measure from. In this diagram, “A” is the measurement of the diagonal cut-corner. If you don’t have any tape, a yardstick (or other small piece of wood) will also work.

 

 

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The diagram to the right shows the pitfalls with miss-measuring a cut-corner. The green line represents a measurement too large while the red line represents a measurement too small.

As you can see, with too large a cut-corner the cover wont completely cover the spa. Too small a cut-corner and the cover simply overhangs a bit.

If in doubt, always go with a slightly smaller measurement. The cover may be slightly large and overhang the corner a bit, but it will cover the entire spa…… and no one but you will ever know.

 

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When measuring an octagon spa, it is extremely important to get dimensions on all sides of the tub.

This example shows an octagon (eight sides). Its length & width measurements (9 & 10), and the side measurements (1-8), are ALL EQUAL.

If they are not equal, it is not a true octagon, but more than likely a cover with cut corners.