Accurate measurements help a window treatment specialist recommend options that fit your windows and suit how you use the room. Before you discuss styles, note each window’s width and height, decide whether you prefer an inside or outside mount, and check for handles, trim, and other obstacles. You do not need to choose a product first. A clear set of measurements and photos gives your specialist a useful starting point and helps identify details that may need an in-person check.
Gather Tools and Label Each Window
Use a metal tape measure, a notepad, and a pencil. Measure in inches or millimeters, and record the unit beside every number. A helper can hold the tape steady for wide or tall windows. Take a photo of each window and label it by room and position, such as “living room, left.” This prevents measurements from getting mixed up when a room has several similar windows.
Measure each window separately, even if two appear identical. Frames, wall openings, and trim can vary slightly. Note whether each window is fixed, slides, swings inward, or opens outward. This information can affect how a treatment operates and whether it needs clearance from the window or nearby furnishings.
Measure Width and Height
For an inside mount, measure the inside width of the frame near the top, middle, and bottom. Record all three readings rather than choosing one yourself; a specialist can advise which dimension to use and whether deductions apply. Measure the inside height on the left, center, and right as well. Check that the tape runs between the surfaces where the treatment would sit, not across the trim.
For an outside mount, first decide where the treatment should cover: the frame, the trim, or part of the surrounding wall. Measure the intended coverage width and height, and write down the exact start and end points. Include enough coverage to suit your privacy and light-control goals, but leave final sizing decisions to the product specifications or your specialist.
Check Mounting Space and Obstacles
Measure the depth of the frame from its front edge to the glass, and note any handles or locks that project into the opening. An inside mount may need a minimum depth to fit neatly; requirements differ by product. Also check for sloped sills, uneven surfaces, screens, and window cranks. Photograph anything that could touch or block a blind, shade, or curtain.
For an outside mount, check the flat space above and beside the window for brackets and hardware. Look for nearby walls, cabinets, moldings, ceiling edges, and light fixtures. If you are considering curtains, note the space available for the track or rod and how far the fabric can extend to each side without covering a doorway or obstructing furniture.
Prepare Notes for Your Specialist
Create a simple record for each opening: room, window type, width readings, height readings, frame depth, preferred mount, and any obstacles. Add a photo that shows the full window and another close-up of the frame. If you are unsure whether a measurement should run to the glass, frame, or trim, write down what you measured instead of guessing.
Share how you want the treatment to work: privacy, room darkening, glare reduction, or easier window access. Mention whether children or pets use the room and whether the window needs to open freely. A specialist can use those details alongside your measurements to discuss suitable options and confirm what should be measured again before an order is placed.
A labeled measurement sheet, clear photos, and notes about mounting space give your specialist the information needed to guide the next steps. Measure each window individually, record what you actually checked, and avoid adjusting dimensions to fit a product before confirming its requirements. Bring your notes to Brisbane Window Studio to discuss suitable options.