subfloor

no clue

that is what it is. So other than pulling up all the floors (not an option right now) what do i do?

JetSwet

Take the chance and go over it with the hardwood, I say take the chance cuz when you shoot the nails into this board they tend not to hold well, let alone held to what the MDF board is attached to. Most places that have MDF usually have it over plywood that is over joists so other words they use it for hight a filler for carpet.

no clue

thank you guys so much for all of your help. I'll try and post some pictures in month when i get it done.

JazMan

No clue,

Well,.................? Nailing into that stuff is like drilling a hole. The nail is not gonna hold very well. You need plywood or OSB, something with a grain for the nail to grab.

Also I've got more bad news for you. As far as I know any hardwood 5" or wider gets nailed as normal, plus needs to be glued too. Check the installation instruction first. What brand do you have?

Jaz

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