Reply #3: Heavy duty liquid nails

[Wash. state Desk Jet]

about $ 3.00 per tub. The other way is to anchor it with screws. You will need a heave duty drill /rotor hammer /concrete lead liners ,you match up the holes in the threshold and drill holes in the floor,place lead liners in the hole ,put threshold over that and screw it in. The package of lead liners comes with screws and will tell what size concrete bit you will need. Or you can buy a kit with the drill bit . Ask for assistance at your hardware store.

If the threshold is wide and beveled on both sides you may be able to cut a piece of ply wood to fit into the gap in the center, and if it sits flush on the concrete ,glue the ply wood down to the floor ,let it dry than use small screws and glue to secure the threshold down.