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Columbia has spent decades developing and testing a robust and energy efficient Curb Mount skylight design. We believe that Curb Mount is the right choice for the Canadian climate, and our frame design has proven itself on over a million homes across Canada and the United States. It delivers exceptional leakproof protection – a combination of the skylight structure and the curb.

Curb Mount requires the installer to build a wooded curb that lifts the skylight off the roof deck—constructing the height of the curb to the specific requirements of the location and the roof – such as adding extra height in an area of heavy snowfall and ice buildup. The curb allows for easy adaptation to different roof structures thanks to its versatility, and ease of installation.

Waterproof Crosssection
The made in Canada leak proof Curb Mount skylight

Curb Mount skylights are known for their leak resistance because the curb is built into the roof structure and wrapped in a waterproof underlayment membrane and aluminum flashing, essentially becoming part of the roof. The flashing overlaps and steps down the shingles in a way that prevents rain from entering, forcing it to drain off the flashing. The shingles are applied so they don’t touch the side of the flashing, leaving a half inch gutter allowing for rain flow. The skylight is fastened on top of this curb, and the top of the curb is protected by flashing and sealants ensuring a tight, watertight fit. 

This design significantly reduces the likelihood of leaks, making Curb Mount skylights a durable and low-maintenance option.

Rain Gutter Diagram

Ideal for roof replacements and upgrades

For homes or buildings undergoing roof replacements or upgrades, Curb Mount skylights are an ideal choice. If the existing skylight curb is still in good condition, a new skylight can be installed on top without requiring extensive modifications. This saves time and labour costs, making curb mount skylights a cost-effective solution during renovations. Check that the existing installation meets current building codes, or is damaged, and replace if necessary.

The right choice for new built construction

Curb Mount installed skylights are made to last, requiring only minimal maintenance such as cleaning. The structural integration of the curb and the roof deck makes for a far stronger connection. You can rest assured a Curb Mount skylight will protect the investment in your new home for the life of the roof.

Compatibility with Green Roofing Systems

Curb Mount skylights are also compatible with modern roofing technologies, including flat, and living roofs. The raised curb design allows for easier integration with roofing materials, ensuring proper drainage and insulation. Flat roof installations require a 10 degree site built sloped curb.

For exceptional energy efficiency, the side of the curb can be insulated to increase the energy efficiency of the skylight in combination with our triple glazed ENERGY STAR certified model.

Whether you’re looking to improve the comfort of your home, reduce energy costs, or upgrade your roofing system, curb mount skylights are a smart and stylish solution.

Curb Mount can be used on a sloped shingle, cedar, metal roof, or flat roof. Accommodating glass and acrylic dome skylights.

It is important to note, that for the Curb Mount skylight to be leakproof it needs to be installed by an experienced skylight installer. Incorrect installation will reduce the skylight’s ability to function properly.