A window is both the glass and a structure that holds a sealed unit, or single pane of glass, in place. Measure the height and width of the old window screen. SemiTrailer Truck 40' WB Trucks, Parking design, Semi Assumes you have existing old window screens to measure. How to measure aluminum windows for screens . 1 side is little less deep and another side is comparatively deeper. Control whether a strong summer breeze or a whisper of air flows into a room. Subtract 1” to allow for clearance on each side for the brick clips. *measure window screens to the right side and subtract about 1/8″. Measure at the bottom, middle and top of the window. Measurements are normally stated in width and then height. Measure near the corners as sometimes the middle may be bowed. This measurement is your window screen 'height'. Fit the little tape measure in the deeper groove side of the channel. Well suited to contemporary or classic designs. Louvres allow ...