Basic Instructions on Using CDX Plywood as an Underlayment for Laminate or Vinyl Flooring.
1. CDX Plywood should be installed directly on top of the subfloor (This is due to the face that, luan itself is not strong enough to to be the concrete subfloor)
2. Leave a quarter inch gap around the edges of the CDX Plywood, to allow for expansion/shrinkage. This is very important
3. Use pressure cuts to cut through the panel, with one direct cut. This ensures the board is clean around the edges, and there are no gaps in your work
5. Once CDX plywood is installed, insure to clean the floor surface before applying the flooring vinyl flooring.
Removing CDX Plywood Underlayment
CDX Plywood can be removed fairly easily. Just cut it into strips as long as there is no vinyl backing left. Getting all the staples removed or beat down is by far the hardest part.
If it's ran underneath the cabinets use a sharp razor knife and score it several times and it should break off pretty clean.
A lot of staples will have slivers of CDX Plywood caught underneath you should either pull out or use needle nose pliers to remove the sliver then hammer then down flush. When you remove the CDX Plywood don't want anything sticking up.
It's a good idea to refasten the subfloor onto the joist with screws or screw shank underlayment nails. You should see how flat it is too... may have to belt sand some seams.
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