for mounting depth requirements, refer to our “product details” tab for each product you are ordering
if window frame is not deep enough, please order outside mount
Step 1: Measure the inside width at three places: the top, middle, and bottom. Round to the nearest ⅛”. Enter the smallest measurement on your worksheet. This is your ordering width. The manufacturer will take necessary deductions from this number.
Step 2: Measure the height at 3 places: left side, middle and right side. Round to the nearest ⅛”. Enter the smallest measurement on your worksheet. This is your ordering height. (The manufacturer will take a height deduction for clearance)
Step 3: Measure the depth at 3 places: left side, middle, and right side. Mounting surface must be flat in order to attach headrail. Also, obstructions may cause measurements to vary so it is important to keep this in mind while measuring. Round to the nearest ⅛”. Enter the shortest measurement on your worksheet. This is your ordering depth.
90 degree corners on all edges are required for mounting. To ensure you have a 90 degree angle on all corners, measure diagonally both ways from one corner to the other. These two measurements should be identical.
