The outside curb measurement needed for this skylight is 17 1/2 x 49 1/2 inches. Skylight will still fit with a1/4 inch difference.

The FCM model skylight is recommended to be installed with a 0° - 60° or 0:12 - 20:12 roof pitch.

Elizabeth, the flashing kit you will need is determined by the roof pitch and roof material you will be installing with. Please contact us with the details of your project and we will be glad to assist you in making the correct choice. You can contact the Customer Service Team at 1-800-888-3589 between 8:00 am - 7:00 pm (Mon- Fri) or 9 am- 5pm (Sat) EST. Or you can email us at vcustomer.service@velux.com.

If this is being used on a shingle roof, the flashing kit is called: ECL 1446 0000C. For tile or thick shake material, the kit needed is: ECW 1446 0000C.

Please reach out to VELUX Customer Service @ 1-800-888-3589. They can help you determine exactly what is needed for your application.

Yes it can be used in all climate zones.

Outside curb dimension needed is 25 1/2 x 49 1/2 inches.

Yes, you can install this skylight onto a metal roof. (up to 60 degree roof pitch) Your roofer or installer will need to fabricate their own flashing for this application as VELUX does not have a kit for this roofing material type.

Please give VELUX a call at the Customer Service Team M-F at 1-800-888-3589 between 8:00 am - 7:00 pm and Sat 9:00 am - 5:00 pm Eastern time. We can discuss your measurements and application to help you find the best product to meet your needs. The VCM/VCS/VCE models in size 2234 have an outside curb measurement of 25-1/2" x 37-1/2" and a maximum skylight clearance of 26-5/8" x 38-5/8", this may work for you, but I would recommend calling so we can get all of the details from you and have a clear understanding of what is needed for the correct replacement.