Is it possible to install vinyl plank flooring over pitted plywoo

[Stephen Kleyn]

I have a 16 unit apartment that got destroyed by hurricane Michael 9 months ago. We are getting rebuilt but have run into a problem with the second story floors. I want to go back over the plywood with vinyl plank flooring but there seems to be some damage on the plywood, some dips and some ripped areas. I can't use any kind of a kwikset over it because it's a floating bouncing floor. Does anyone have any experience or recommendations on laying a thin insulation over the floor and then vinyl plank on top? We are over budget and three months over our timeline on repairs, and I Durance has been fighti g me the hole way... Trying to get this done as fast as possible to bring in income. Any advice is appreciated

[Greg Morris]

This is the correct way. You want to put down 1/4-inch BC plywood as an underlayment. 1/4-inch BC plywood makes a good underlayment. 

1. Allow 1/4-inch gap along the walls and between the joints for expansion. Secure the plywood to the subfloor at 6-inch intervals with 1-inch deck screws placed along the edges. Set all screw heads slightly below the surface.
2. Apply floor patching compound to the joints and over the screw heads. Smooth it in place and allow it to dry. Sand any rough edges with medium-grit sandpaper.
3. Clean the floor with a wet-dry vacuum to remove any dust or debris that remains. This will give you a nice smooth floor. If you dont do this your vinyl will show the floor  defects in time.