Center-Pivot Roof Windows

Center Pivot Roof Window (GGU)

GGU Size Code CK02 CK04 CK06 FK04 FK06 FK08 MK04 MK06 MK08
Outside frame (W"xH") 21 5⁄8 x 30 5⁄8 21 5⁄8 x 38 1⁄2 21 5⁄8 x 46 3⁄8 26 x 38 1⁄2 26 x 46 3⁄8 26 x 55 30 3⁄4 x 38 1⁄2 30 3⁄4 x 46 3⁄8 30 3⁄4 x 55
Rough opening /
Finished frame (W"xH")
22 1⁄8 x 31 1⁄8 22 1⁄8 x 39 22 1⁄8 x 46 7⁄8 26 1⁄2 x 39 26 1⁄2 x 46 7⁄8 26 1⁄2 x 55 1⁄2 31 1⁄4 x 39 31 1⁄4 x 46 7⁄8 31 1⁄4 x 55 1⁄2

VELUX Center-Pivot Roof Windows offer smooth, effortless operation with a top control bar that allows the sash to rotate 180 degrees for easy cleaning and ventilation. Ideal for pitched roofs, these windows provide natural light, fresh air, and expansive views—perfect for lofts, attics, or upper-floor living spaces.

Their space-saving design makes them especially suitable for rooms with low ceilings or limited roof access. With energy-efficient glazing, durable construction, and a clean, modern finish, VELUX center-pivot roof windows deliver long-term performance and everyday comfort.