Where to Measure to Pick Out Replacement Skylight

Updated 09/03/2026 | Published 08/29/2026

Question:

I have an rv sky light that is cracked. How do I measure for a replacement skylight?

asked by: Duane C

Expert Reply:

Hey Duane, you would need to measure the opening in the roof for the skylight in order to pick out the correct replacement. For example, the # SR79YR is for an opening that measures 14 inches by 22 inches. The overall flange dimensions are 17-1/2" wide x 25-1/2" long and the bubble height is 4-1/2 inches. What is the skylight opening dimension that you have?

expert reply by: Jameson C

Duane C.

9/3/2026

14x22 opening witha 3 inch thick roof. Can you provide some options that will work? I also need the inner garnish.

Jameson C.

9/3/2026

@DuaneC The part # SR79YR is correct size for your cut out dimensions and comes with a garnish that is the correct size so it would work great for you.