DuraTherm Spa Cover Frequently Asked Questions

Guide: Spa Cover Measurement

Ensure a precision fit for your new custom spa cover using this handy step-by-step instruction guide. All you need is a tape measure, pen & paper, and maybe a carpenter square. Let's get started!

Pro Measuring Tips:

Measure the old hot tub Cover if:

Cover hasn't warped or distorted since purchase
You like the way the old cover fits

Measure the spa Shell if:

Cover is missing or fits poorly
Cover is warped, sagging, or distorted

More Tips:

Reading a tape measure is easier with a helper
Manufacturing tolerance is ± ¾"
Covers 1-2" oversize tend to fit well vs. too small

Choose Your Cover Shape:

4-Side

Round

8-Side

4-Sided Spas:

1. Measuring Length & Width:

Measure widest outer edge of spa shell/cover
Length & Width inches are rounded UP
Center hinge folds your "A" dimension in half
Square (equal length & width) - fold is not an issue
Rectangle (unequal length & width) - cover usually folds away from keypad (long side folds in half)
Small variances (i.e. 84"x85") are likely square

2. Measuring Corner Curve:

Use a carpenter square to measure corner radius of cover or widest part of actual shell corner rim
Where the corner curve touches the inch marks of the square is the radius
Round radius DOWN - a smaller number always fits a larger curve
NOTE: Squared corners have a 0” radius

3. Measuring the cover Skirt Length:

Measure skirt down from cover seam
Or measure exposed spa shell lip plus about ½"
Round skirt length UP to the nearest whole inch
All straps extend about 4” below length of skirt
New strap latches supplied - OEM position varies

Start Cover Order

Round Hot Tubs:

1. Measuring Diameter:

Measure widest outer edge of spa shell/cover
Outside diameter is rounded UP to nearest inch
Cover is for perfect circle only - no oblong or oval

2. Measuring the cover Skirt Length:

Measure skirt down from cover seam
Or measure exposed spa shell lip plus about ½"
Round skirt length UP to the nearest whole inch
All straps extend about 4” below length of skirt
New strap latches supplied - OEM position varies

Start Cover Order

8-Sided Spas:

1. Measuring Length & Width:

Info goes into a CAD drawing for your approval
Measure widest outer edge of spa shell/cover
Length & width inches are rounded UP
Center hinge folds your "A" dimension in half
Equal Octagon has same dimensions all sides - fold orientation isn't an issue
4 Cut Corners has longer sides - cover usually folds away from keypad (long side folds in half)
Small variances (i.e. 84"x85") are likely equal

2. Measuring Cut Corners:

Measure rounded corners from center of curve
Round cut corner inches DOWN - a smaller number will always fit over a longer corner

3. Measuring the cover Skirt Length:

Measure skirt down from cover seam
Or measure exposed spa shell lip plus about ½"
Round skirt length UP to the nearest whole inch
All straps extend about 4” below length of skirt
New strap latches supplied - OEM position varies

Start Cover Order

Features | Measuring | Swatches | FAQ | Warranty

ETA (Build + Transport time): 4-6 weeks.

Highest quality cover

I purchased this cover in 2020. I chose the highest quality material. This past summer, it started "taking on water". I knew it was going to need replaced soon, but I thought I might make it through the winter. Last week, I opened it and it tore the screws from the lift right out of the side of my hottub. So much for the lighter material. I feel like I should get more than 3.5 years out of a cover. I got 5 years out of the manufacturer's cover.

I would not buy this product again

Just goT my new $500 cover in today. Fit is not satisfactory. Cover does not close flat across the tub, rocks back and forth like a rocking chair and one side pokes up 4"" high when the other side is pushed down closed. The full length seam seal is obviously made extra thick and holds the cover open. Called to discuss it ans was told it was designed this way so I would have to attach the hold down clips to keep it closed and keep people out of it. I complained that the design caused tension on the hinge and was pulling at the stitching and that there was no one to keep out of it. Was told that it would stretch out over time and wouldn't hurt the stitching. Also was told to weight it down if I didnt want to attach the straps. I made it clear that if I had know this I WOULD NOT have purchased this cover. This is my 4th cover in 14 years on this well maintained tub, and the firts cover I have ever seen not close. Telling me it wont pull on the hibge stitching insults my intelligence and experience as both an upholsterer and machinist.

Excellent quality and delivered as promised.

Custom dimensions were delivered with high quality workmanship and materials.
I recommend this cover highly.

High quality cover

My hot tub retains heat significantly better with this cover compared to the old cover I was using previously. I am using the metallic heat shield.

4 years before falling apart

I’ve been very happy with the cover up until the four year mark, at which time the fabric started ripping and the seams falling apart. The tub is not sheltered at all, and I live in New England, so the cover did endure some abuse from the elements, but I expected that with a little duck tape I could squeeze at least five years out of it, but no way. The cover is falling apart in every way - the seams, the fabric, you name it. For $500 (2019 prices), I expected more life than I got.

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Pro Measuring Tips:

Choose Your Cover Shape:

4-Sided Spas:

Round Hot Tubs:

8-Sided Spas:

Customer Reviews