For Professionals

Explore insights empowering professionals.

• Where can I find product testing, regulation codes, and certifications for each VELUX product?
• What is the STC rating for VELUX skylights?
• What is the ICBO number for VELUX skylights?
• What flashing do I use with a metal roof?
• How many skylights can be installed with one roll of ZOZ 216 VELUX Adhesive Underlayment?
• What is the difference between a 5-star installer and a 3-star installer?
• Are skylights UL approve?
• What flashing do I use to group skylights together?
• What spacings are available for Combi-flashing?
• What flashing should I use with Fixed Curb Mounted Skylights?
• What is an instant light shaft?
• How long does it take to receive an order?