Velux® Skylights F.A.Q.s

What do I do if I see clouding or fogging between the panes of glass?

Clouding or fogging of an insulating glass unit occurs when there is a break in the inner seal between the glass panes. As a result condensation forms between the two panes. Units manufactured after January 1, 2000 have a 20 year seal warranty. If you encounter a problem with the seal of your glass, obtain the serial number from the roof window or skylight and contact VELUX®. We will be glad to help you determine if your product warranty is still in effect, and what actions can be taken to correct the issue with the seal.

Why is roof pitch important for skylight installations?

Each of our flashing kits are engineered with specific pitch requirements. The roof pitch is important because it ensures that the roof has the proper slope to effectively drain water off of both the flashing and the skylight. The roof pitch and the roofing material used are both important in determining the type of flashing needed.

Can I apply a film to the glass to decrease heat and light?

VELUX® does not recommend the addition of any store-bought film to the glass of our skylights. The addition of store-bought film or tint will void the warranty on the glass. However, our glass is manufactured with a Low-E coating and injected with Argon gas that make our skylights very energy efficient. In addition, we also offer several sunscreening options that can be added to our skylights and roof windows to regulate light and heat.

Can the glass in existing VELUX® skylights and roof windows be replaced?

Replacement glass is available, and it can be easily installed in most models. On VS skylights manufactured after April of 1996, the entire operating sash must be replaced. If glass replacement is needed for the FCM, the entire FCM skylight can quickly and easily be replaced.

See our list of general F.A.Q.s here.