How to Trim a Basement Window
When walls are thick, you need wide extention jambs and a deep stool.
Synopsis: When trimming windows in thick walls (basement walls, for instance), you need wide extension jambs and thick stools. Montana builder and remodeling contractor Chris Whalen displays his method for building out jambs to accommodate windows in thick walls. Chris starts by building a deep stool extension, then cuts and attaches the stool. Then, using biscuit joints, he attaches the top and side jambs with an offset. Finally, Chris completes the work by attaching the head casing.
Finish carpentry is the art of making rough stuff look good. Even trimming a window can be a challenge because it’s usually complicated by poorly aligned framing or uneven drywall. If things go well, you can tenderize the drywall with a hammer or shim the window into alignment. If not, the window jambs might need to be planed, the casing tweaked, or the miters back-beveled at odd angles. In the end, a bead…