b'Measuring for Full Frame RemovalEXTRAMost instructions show measurements SPACE INtaken within the tracks from one side to Sash WEIGHTthe other, and from top to bottom. Weights POCKETThese measurements are sufficient for box frame or pocket replacement - i.e.,Frame-In replacement. However, win-dows are installed initially against therough framing (the rough opening), beforethe interior wall board and exterior sidingis installed and trimmed out.If the old wood window has weights, thereis a weight pocket behind the jambs. Theouter surface of the sloped sill of old woodwindows is considerably above the rough sill; anddepending on the thickness of the window sill itself, itbecomes difficult to estimate the real rough openingdimensions unless the old window was totallyremoved. And, certainly you dont want to be remov-ing the old window and then measuring in order toproperly size the new window.Perhaps worse is receiving the new windows on thejob, removing the old windows and finding there is a mis-measure (really a mis-estimate) requiring fill-inor larger gaps that invite water and air infiltration.Experienced installers may be able to eyeball thereal dimension, but the safest way is to get the realdimensions and supply them to the factory with theorder.The drawings show the actual relationship betweenthe rough opening and the interior surfaces of woodand finned window. Using a small drill bit, it is possi-ble to make a small hole into which the drill bit canbe inserted, and using your fingers, you can identifythe additional space that will be exposed when theold window is totally removed.These techniques can be used when you want todetermine the space that will be left after the fullframe is removed for Metal Windows and otherswhere mounting parts areburied inside the wall.Professional measurement sheets have extensive Using a small drill bit, create a hole in the frame or wall board to insert. Using yourdimension call-outs. Too much information backfingers, as shown, push the drill bit until it rests on the rough opening framing.at the factory is better than too little. Use yourRemove the drill bit and measure from the tip of your fingers to the drill bit tip andbest judgement. add that to the measurement between the inside surfaces of the old window.Window Fitters Guide to Window Installation242020 AWDI, LLC Do not reproduce without permission'