Impact Windows America
How to plan window and door measurements
Start with the project address, required positive and negative design pressures, opening dimensions and substrate. The approval number and approved installation detail must match the exact system being quoted.
Record three different dimensions
Identify the rough opening in the wall, the outside frame size and the individual panel size separately. Also record the usable clear passage with the system fully open. These dimensions are different; a panel limit does not establish the complete opening size.
Set the finished-floor reference
Show the interior and exterior finished-floor elevations on the opening sketch. Identify whether the selected sill sits on the surface or recesses into the construction. Review the sill section before calculating the order size or reserving a recess.
Allow for the moving panels
Mark the opening direction, panel count and parking position. Include handle projection, stacking or swing space, screens, nearby walls and furniture. At a counter opening, show the worktop, faucet and shelving so the open panels remain usable.
Confirm dimensions before ordering
Use an opening ID on the site sketch, quote and approved drawings. Have the installer verify the field dimensions and wall conditions. Apply only the frame clearance and adjustment allowance specified for the selected system; do not use a universal deduction.
