How To Install Skylights On Low Slope Roof

For roof slopes between 2 12 and 4 12 most skylight manufacturers will not guarantee a waterproof installation unless the skylight angle is raised with a built up curb or a special inclined flashing kit figure 3 22.

How to install skylights on low slope roof.

Steeper pitches for skylight installation on flat roof. A range of skylights designed for installation in flat low pitch roofs from 0 60 degrees. Sunday august 5 2018 the traditional metal roof types such as 5v crimp shown above and corrugated are rated by the manufacturers for use down to a 3 12 pitch three inches of vertical rise for every foot of horizontal run. The amount of solar heat absorbed into your home is affected by the slope or angle of your skylight.

Skylight installation on low slope roofs. Skylight installations on steep slope roofs 3 12 pitch or greater about 15 degrees from horizontal up to 75 degrees or 15 degrees from vertical and installations on low slope or flat roofs less than 3 12 pitch. These new flat roof skylights are fitted in a pvc curb and topped with one of two covers. Learn more about common installation practices for low slope residential applications including why owen corning deckseal roofing system is a preferred choice.

When using manufacturer produced curbs that aren t tall enough the roofing professional will have to extend the curb. With a velux flat roof skylight designed to meet the growing demand for skylights in homes with flat or low pitch roofs you can transform and improve virtually any space with daylight. For instance a low slope usually admits more solar heat in the summer and less in the winter typically the opposite of what homeowners want. Some suggest to set the slope around 10 degrees more than the geographical latitude of your home.

Skylights can be successfully installed at steeper pitches but for flat roof applications the height at the top end of the curb will begin to be so great it will compromise aesthetics and potentially contravene planning permissions which in some cases will limit the height of any structure that can be built above roof level. A certified velux installer will be able to help you with the specifics for your project and you can find one near you here. Velux skylights can be installed for roof pitches between 15 and 55 or up to 65 to 90 with the use of special screens depending on the type of roof window. Can metal roofing be used on a low slope pitch roof.