Take several measurements for each window in your bay, and use the smallest measurement as your point of reference. These measurements are only a few inches/centimeters, so either a ruler or tape measure will work. You may need a ladder for taller bays, though.
You should be able to find this information on the packaging for the blinds, or when ordering online. Ask a sales associate or contact the manufacturer if necessary.
Use these measurements when ordering custom roller blinds, or if you’re looking for the closest fit amongst in-stock blinds. Recessed blinds are a good choice for either box (right-angle) or angled bay windows. They’re easy to measure for and install, they are unobtrusive, and they don’t conceal the window frames (if you’d like to showcase them).
“Face-fix” simply means that the blind brackets will be attached on the front face of the window frame, and will normally conceal both the frame and the glass.
For example, your brackets might be 2. 5 inches (about 6. 5 cm) deep.
When pulled down, either the side blinds will slightly overlap the back blind at the corners (Option A), or the back blind will overlap the side blinds a bit (Option B). To avoid any overlap, you can subtract 5 inches (for example) from the back panel and 2. 5 inches from each of the side panels. But your measurements and installation will need to be extra precise to limit gaps in blind coverage.
Bay windows usually have large bottom ledges, but you can cut down the paper’s size or use scraps of cardboard instead if you have a small ledge.
Keep marking each intersecting point on the bay’s ledge as well.
A 3-sided bay sketch will look like this: /￣\
“ab” = 70 cm - 1 cm = 69 cm. This is the width for the left-side roller blind. “bc” = 97 cm - 1 cm = 96 cm. This is the width for the center roller blind. “cd” = 71 cm - 1 cm = 70 cm. This is the width for the right-side roller blind.
If necessary, order blinds that are slightly longer than this in length — for instance, if your measurement is 67 cm and your can only order either 65 cm or 70 cm, go with 70 cm.
Hold each bracket in position and mark the screw holes on the window frame. Use a bar/spirit level (and a string if necessary) to make sure your bracket markings are level before drilling. Pre-drill holes for your screws, and use anchors if you aren’t drilling into a solid, sturdy surface. After you screw the brackets into place and slide the blinds onto the brackets, tug on them to make sure they are securely attached.
