WHAT ARE THE OUTSIDE CURB DIMENSIONS?
When you are replacing an old skylight, odds are the curb that the skylight sits on is still in fine shape; you simply need a fresh, shiny, new skylight. The outside curb dimensions are measured to the outside edge of the shoebox we spoke about in the above description. These dimensions refer to the outer-most edges of a pre-existing roof curb. By removing the skylight frame and measuring the length and the width to the outside edge of the curb, taking into consideration the roof flashing, you will have the outside curb dimensions. For purchasing curb mounted skylights, outside curb dimensions are required.
