I have a downstairs bedroom that is below an attic storage space.

The storage space is four feet wide by fifteen feet long and is above one end of the bedroom.

The is no insulation between the two. Only tongue and groove boards as the BR ceiling/storage area floor. The storage area does have a foam pad with carpet over the foam.

On cold days you can feel cold air coming down through the spaces in the tongue and groove boards.

What is the best way to provide more insulation or vapor barrier between the two floors?

I have though about trying this:

- rolling back the carpet and pad.
- caulking the board seams.
- installing roofing paper or a wood flooring vapor barrier.
- reinstalling the foam pad and carpet.

Will this work or is there a better method.