You always order by daylight size: the clear opening visible from inside. Your new skylight fits straight away.
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Daylight size= your order size
The clear opening visible from inside. Measured along the inside of the curb, from edge to edge.
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Roof openingstraight curb = daylight size
The opening in your roof. With a straight curb (/00), it equals the daylight size. With a sloped curb (/20 or /30), it is 20 or 30 cm larger.
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External skylight size= daylight size + 160 mm
What you measure on the outside of an existing skylight. The flange extends 80 mm on each side. Subtract 160 mm to find your daylight size.
Sizing questions
What is the difference between daylight size and roof opening?
I am measuring my skylight from the outside. What do I order?
You already have a Skylux curb
You are creating a new roof opening
You have a curb from another brand
Replace your old skylight in 1, 2, 3.
Upgrade without demolition work. Our adapter frame always fits.
Smoke and heat extraction
Safety starts at the roof. Skylux smoke and heat extraction systems are CE certified in accordance with EN 12101-2:2003 and provide controlled extraction of smoke and heat in the event of fire. Two ranges: Skymax CE for stairwells (NBN S21-208-3:2018) and 160° CE for industrial buildings. Including Skycom control units and all components for a complete installation. Maintenance and inspection by Skylux’s own technicians.