Measuring Skylight Windows

Although some people will keep skylight windows open, there are a number of options whereby these windows can be covered. For instance, depending on the direction in which your home faces, you could find that the afternoon sun becomes quite hot. Therefore, you could enjoy the natural lighting of your skylight in the morning and late afternoon hours but during the hottest time of the day, cover it.


For measuring a skylight window, start by measuring the base width on the inside of the arch opening. After that, the height would be measured from the tallest point of the arch opening, which is typically the center. Remember, the majority of arches associated with skylight windows are not perfect. Therefore, if you decide to have a shade made for your skylight, be sure to use a sharp straight edge for trimming. With that, you can accommodate the imperfections but without causing any damage to the shade.


With skylight windows, the inside and outside mount installations are almost identical. For instance, if you want the shade to be on the inside, then the width and height of the skylight on the inside opening is measured on each side and in the middle. For large skylight windows, those measuring more than 96 inches, we recommend that you take four to five measurements, depending on the size. With this information, you would then order the shade for the shortest height, as well as the smallest width measurement.

Of course, make sure you always round the inside measurements up to the nearest 1/8 of an inch. Remember, with other window measurements, you would reduce the measurement by 1/8 of an inch but for skylight windows, you measure up. When you order, you will find that the manufacturers of shades for skylight windows take this into account so you do not have to worry about that.

Recessed Windows

If you want to install shades on your skylight windows that are completely recessed, then you would need a minimum of two inches for the mounting depth. However, using a non-flush type of installation for this window type is not suggested although the shade could protrude by 1/4 of an inch. Of course, any obstacles that might affect the operation of the shade would also need to be taken into consideration. Then for the outside mount of shades for skylight windows, you would follow these same instructions with the exception that only 1/4 of an inch is needed for the bracket attachment.