Guide: Spa Cover Measurement

measuring tape

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-Sided Spas:

measuring for your new spa cover

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
measuring corner radius

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
Measuring spa cover skirt

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

 


Round Hot Tubs:

duratherm round spa cover measuring

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
Measuring spa cover skirt

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

 


8-Sided Spas:

8 sided spa cover measuring

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
8 sided spa covers

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
measuring cover skirt octagon

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

 


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

Customer Reviews

Based on 2689 reviews
83%
(2227)
12%
(322)
3%
(69)
1%
(30)
2%
(41)
C
Customer
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.

W
William B.
Excellent quality and delivered as promised.

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

B
Brian B.
As Expected

Spa cover was as expected. It shipped much sooner than the original shipping time frame provided.

C
Clifford R.
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.

M
M.B.
Excellent cover

Lightweight, durable, easy to open. Love this cover.

Your recently viewed products