Split some dowels or close to that round shape out of pt and pound them into the holes.
How to glue baseboard to concrete walls.
Now apply glue then use nails through the base and into the dowels you pounded in.
You can apply the adhesive to the back of the baseboard.
Make sure you use a glue that is heavy duty and ideally dries out quickly so you don t have to apply pressure onto the baseboard trims for a long time.
Counterbore the tapcons in a 1 2 hole and then plug or bondo the whole.
How to glue baseboard trim to a concrete wall step 1.
How to install baseboard molding to concrete walls.
Lay the base on the floor and mark the hole locations on the base.
Place the baseboard molding that you want to use in the basement for at least two days.
If the walls meet at an outside.
Or adhesive and a few tapcons.
Measure each wall in the room and note the measurements.
Spray the base of the concrete wall with an all purpose cleaner.
Cut all trim pieces to size with a circular saw jigsaw.
You can lay the adhesive as drops every 8 or as beads.
Usually you will find this glue in diy stores at the flooring area.
Scrub the bottom of the wall with a scrub brush.
Cut your piece mark the wall behind the base and roto hammer 3 8 holes about every 4 6 ft.