Table of Contents
What is fixed curb skylight?
Curb-mounted skylights sit on top of a framed opening in the roof. Framing materials are fastened directly to the roof sheathing, then flashed (thin pieces of impervious material installed to prevent water entry around openings), before a curb-mounted skylight is fastened to the top of the curb.
Whats the difference between deck mounted and curb-mounted skylights?
Essentially, the difference between a curb-mounted and deck-mounted skylight is that a deck-mounted skylight sits flush with the roof, while a curb-mounted skylight is held up higher than the roof face by a curb.
What is standard skylight size?
For rectangular fixed or vented skylights with flat tempered glass, standard sizes vary from 14-72 inches in width and 16-96 inches in length. Average skylights can vary quite a bit in weight but average around 60 pounds and can go all the way up through 150 pounds.
How do I know what size skylight I need?
As a general rule, the size of a skylight should be 3-5% of the floor area of the room. For example, a room which is 4m by 3m (12m²) would require a 800mm by 600mm skylight (0.48m²). A larger skylight might be required for rooms with no or few windows.
What does Velux GGL mean?
GGL/GGU INTEGRA® Centre-Pivot Roof Window. The centre-pivot window is a classic and versatile design manufactured in high quality natural pine with the option of a clear lacquered pine internal finish (GGL) or a white polyurethane internal finish (GGU).
What do the Velux codes mean?
The VELUX brand window codes are found on the top right-hand edge of the roof window when you open it. The data plate tells you the type of window and the window size shown through the code. As shown below in the example, 304 would be 78cm x 98cm and the bottom window code 4 would be 114cm x 118cm.
Can skylights go on flat roof?
You can install a skylight on just about any roof slope. Very-low-slope and flat roofs present the added challenge of ensuring that the skylight surface is set at a minimum slope. Most major residential-skylight manufacturers require a slope of 3-in-12 or 4-in-12.
Why do all skylights leak?
Improper skylight installation is the #1 cause of skylight leaks. The window that makes up the skylight must be fitted precisely to the opening made for it. If the fitting is not done correctly, you may experience leaks right away. Or they might occur within a few weeks or months when the flashing begins to fail.