b'Metal Frame-Out- Replacement SequenceStep 1: Step 3:Most original windows Removed the nailswith a fin have been carefully from the oldtrimmed with applied windows fin.exterior wood trim orcasing to cover themounting fin and abutthe siding.Carefully break anysealed joints betweenthe casing, the sidingand the window.If there is no casing and the siding butts to window frame usinga J Channel, cut-backthe siding with circularsaw or Fein Tool toexpose the old windowsfin, and proceed the Try to disrupt oldsame from there. flashing as little asAt the finish, use J Channel orpossible.extended leg C Channel tocap the sidingscut ends and form a joint with the new casing trim.Step 2: Step 4:Remove Exterior Casing.Create Sill Flashing using adhesive-backedflashing, and/or liquid applied flashing to cover the old sill andextend up the jambsabout 6 inches.Removed trim will expose old window and its mounting fin.Window Fitters Guide to Window Installation40 2020 AWDI, LLC Do not reproduce without permission'