Exterior: The GPU CK04 top-hinged roof window shown in an open position, demonstrating the smooth operation for easy access and ventilation.
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22⅛ x 39, GPU CK04, Top-Hinged Roof Window

VELUX
SKU:
GPU CK04 0070
$1,013.00

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GPU CK04 Top Hinged Roof Window with Laminated LowE3 Glass
Rough Opening: 22-1/8" x 39"

The VELUX GPU CK04 Top Hinged Roof Window is a great choice for rooms with sloped walls, including lofts, attics, and upper-floor bedrooms. Offering an optimal combination of natural light and fresh air, this roof window features a top hinge for easy opening and closing, and a ventilation flap to ensure airflow even when the window is closed. It’s the perfect solution to brighten your living space and improve air circulation.

  • Top Hinge for Easy Operation – Opens up to 45° and rotates for easy cleaning.

  • Energy-Efficient Glass – Laminated Low-E3 glass reduces heat transfer and is backed by a 10-year hail warranty.

  • Reliable Ventilation – The built-in ventilation flap keeps fresh air circulating even during rain.

  • Durable and Moisture-Resistant – White polyurethane interior frame resists moisture, ensuring longevity.

  • Roof Pitch Requirements – Designed for roofs with a pitch between 15° and 55°.

GPU CK04 Dimensions CK04
Outside frame (W"xH")  21 5⁄8 x 38 1⁄2
Rough opening/ Finished frame (W"xH") 22 1⁄8 x 39

VELUX 10-Year Installation Warranty 


VELUX flashing is designed to perfectly integrate with VELUX skylights, creating a weathertight seal that protects your home from leaks and water damage.  By using VELUX-certified installers and genuine VELUX flashing, you can be confident that your skylight is installed correctly and to the highest standards.

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Efficient Air Circulation for Fresh, Comfortable Spaces


  • Top-hinged design allows for easy opening and cleaning

  • Ventilation flap provides fresh air, even when the window is closed

  • Helps to improve indoor air quality and cooling

  • Perfect for rooms with sloped ceilings needing ventilation

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Durability and Protection Against the Elements


Equipped with Laminated Low-E3 Safety Glass, the GPU CK04 Roof Window ensures durability and optimal performance. This glass provides excellent insulation, keeping your home comfortable year-round while protecting against the harshest weather conditions. With a 10-year hail warranty, it is designed to withstand damage and continue providing energy efficiency.


  • Laminated Low-E3 glass for superior insulation
  • 10-year hail warranty for peace of mind against extreme weather
  • Reduces energy loss, improving home comfort and efficiency