A simple method to attach crown molding is to install a plywood backer board to the top plate which is the horizontal frame above the wall studs.
How to attach cieling molding to concrete wall.
If the walls meet at an outside.
Be sure to get a urethane based heavy duty wall or wood glue.
Cut only the top of the angle off on the mark leaving an l shaped ending.
How to install baseboard molding to concrete walls.
Put on a pair of chemical resistant gloves.
This allows the molding to expand or contract as.
How to adhere crown molding to a concrete wall 1.
If your caulk gun has a.
Place the angle on the wall and with a pencil mark the wall angle at the corner.
Measure the walls where the molding will be installed.
Measure the wall to the corner and add 1 and cut the length of the wall angle.
There should be 1 of the wall angle going past the corner.
When applying the molding to the wall you will need to secure it on with common wall adhesive.
Cut off the tip of a tube of polyurethane based construction adhesive with a utility knife.
You could fairly easily screw that strip of wood to the wall and then attach the molding to the strip of wood with just some glue or a few small brads.
Install the piece and secure it to the wall.
The first thing i though of was to route a groove in the back of the molding and then attach a strip of wood the same size as that groove to the wall.
Cant strip is an angled piece of wood that will fit in the hollow area that the.
This will typically come in a tube similar to caulk and can be applied in long strips using a caulking gun.
Apply cant strip by gluing to the ceiling after the glue sets you will have a firm nailer to apply the crown.