Saw the side casings to length, then glue and nail them in place with 2-inch and 2[fraction 12]-inch finishing nails.[br] 10. nail up through the underside of the window stool and into the bottom. Remove window stool: if the existing window stool doesn�t extend past the drywall on each side by the width of the new wood casing plus 1/2�, remove it and the apron molding under it by cutting through the caulking with a utility knife, then using a pry bar and hammer to take it out.. How to install interior window trim? january 31, 2018 . first published on:august 21, 2017 so, installing interior window trim is a project that is not a very difficult job, but until the interior window trim ceases to be straight. 10.then nail the bottom of end side casings and underside of window stool..
Step one // how to trim out a window trimming out a window when installing window casing inold houses, tom often has to contend with walls that dip and bulge, causing gaps between the trim and wall.. 9. saw the side casings to length, then glue and nail them in place with 2-inch and 2
