Skylight FAQ

No. It would be necessary to replace the fixed skylight with a ventilating unit.

VELUX offers COMFORT tempered glass and COMFORTPLUS safety glass. VELUX now offers electronically tinting glass called SAGEGLASS® in select VSE and QVE skylight sizes. Other special glass options are also available such as Impact glass for hurricane prone areas and tinted or opaque glass for commercial applications.

The only VELUX skylight that can be installed sideways is the FCM curb mounted skylight. All VELUX deck-mounted and self-flashed units and flashing systems have a "true top" and are not to be installed sideways. If deck-mounted or self-flashed units are installed sideways, the warranty on the product will be void.

VELUX can make some custom sized skylights that vary from the standard sizes shown in the Price Guide. We can also make many custom sizes for the FCM curb mounted skylight. For the other deck mount units, we can interchange standard widths and lengths for configurations not listed in the standard Price Guide.

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.

Each skylight or roof window has two identification numbers. One number is on the metal spacer between the two panes of glass after the word VELTERM. This VELTERM number is the glass identification number. The other number is found on a data plate attached to the wood of the unit. The location of the data plate depends on the product model and date of manufacture. Visit the Self Help section of the VELUX Solutions website to determine where to look for the tag number for your model.

VELUX COMBI-FLASHING® is engineered for this purpose. However the pitch of the roof must be 3/12 (15°) or greater. EKL COMBI-FLASHING is designed for thinner roofing materials (shingles, shakes), EKW COMBI-FLASHING is for higher profile materials (Spanish tile) and EKM COMBI-FLASHING is now available for metal roofing.

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.

Yes. The wood slat nailed to the top of skylights is there solely for packing/shipping purposes. That slat is to be removed before the unit is installed.

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.

Skylight with insulated glass lens, built-in wood curb/frame combined with protective cladding that mounts directly to the roof deck.

Skylgiht with insulated glass lens, combined with a durable metal frame, mounts directly to a site-built curb.

Skylight with insulated glass lens, wood curb/frame, protective cladding combined with factory installed flashing system, EPDM and metal, That mounts directly to the roof deck.

Comfort glass consists of Tempered safety glass double-coated with low-E, dual-sealed and injected with Argon gas. This quality glass provides excellent energy efficiency, thermal performance and protects against the sun's fade causing rays. Comfort glass can also be combined with other energy efficient options for even greater performance.

Comfortplus glass features a double-layer of low-E coating (Laminated) for increased energy efficiency plus a laminated pane for added safety and protection from fade-causing UV rays. Comfortplus glass can also be combined with other energy efficient options for even greater performance.

Impact Glass is designed to meet the stringent impact test requirements for hurricane prone areas. A wide range of fixed and venting skylights are now available in Impact Glass, including the ultimate skylight— our Model VSE Electric Venting Skylight.

The revolutionary new technology called electrochromic glass, in VELUX electronically tintable skylights, allows full control of the amount of light and heat that enters a room.

• High energy efficiency results in a more comfortable living environment and money savings on utility bills.
• Meets ENERGY STAR approval guidelines for all climatic regions of the US.
• NFRC rating 40% better than required by most common building codes.
• Provides three times more protection against solar heat gain.
• Resists condensation twice as long as clear glass.
• Protects interior spaces by reflecting the vast majority of the sun's fade causing rays.

• Light control at the touch of a button without losing a view to the sky...even in the darkened state.
• Energy savings and elimination of uncomfortable heat gain, even on the brightest and hottest days.
• Maximum protection from fading of furniture or artwork.