Hi guys,

I'm preparing my parents house for a hardwood installation. There is currently a 3/4" strip flooring over the joists. The widths of the subfloor vary, and is installed on an angle over the joists. Over that is particle board with vinyl on that. I'm going to remove that vinyl and particle board. My question is, can I install the 5" black walnut 3/4" hardwood over the strip subfloor, or do I need to beef up the subfloor. I was going to put the black walnut with staples and PL400 every 6-8 inches. If I need to beef up the subfloor, what thickness would you recommend 1/4 or 3/8??? Is it okay to staple the subfloor or does it need screwed like for tile installation???

Thanks a million for your thoughts,

- Curtis