I recently installed an exterior double door. On the one side, the concrete floor slopes down, so I raised that side with shims. The bottom plate is level. I can cut and replace these shims with pressure treated wood, but I'd like to fill that gap if possible. I was thinking of forcing quickcrete or rocktite into the gap, and a neighbor suggested that liquid nail would probably work just as well.
To summarize I'm looking to:
- Fill the gap between the metal plate and con. 21" x 4" area, starting at 0 and sloping to 1/2".
- Provide support for the plate. Existing shims are not weather proof and will encounter moisture, and possibly direct contact with water.
Most other questions I've seen have to do with the threshold.