Wood – how can I know whether the hardwood floor is glued down or nailed down
hardwood-floor
I am not sure whether the floor is glued down. If yes, it will be a big challenge for me to replace it in the future…
Is there anyway to identify whether it's glued down or nailed down?
Best Answer
Judging by your picture, this appears to be a site-finished hardwood floor. That means it would be installed and then sanded and varnished on-site, and the clearest signal of this is that the floor is one smooth surface, with no bevels or texture changes you can feel by hand at the edges of each floorboard.
Assuming that's true, then it's almost certainly tongue-and-groove slats, nailed or stapled through the tongues. Some boards around the edges may be face-nailed. That's the most common way these floors have been installed for decades, though it's not impossible to imagine it was glued.
In any case it seems like a beautiful floor, and you can change the look by sanding, staining, and refinishing without pulling up the existing floor.
Use screws instead of nails to hold the plywood down. If you can, screw it into the joists, not just the existing floor. You can also put down some glue betwen the plywood & subfloor to prevent the plywood from moving at all. Use tongue-and-groove plywood if possible.
If that doesn't help (and you should be able to do that & check to see if you still have squeaks before putting down the hardwood) you might need to beef up the joists, or add additional bracing, from underneath. Not so hard if the ceiling below is open, a lot of work if it's finished.
You'd have to treat it like a hardwood floor t&g repair:
Run a circular saw down one side, staying away from seam at least
the thickness of the tongue, with depth set to board thickness.
Repeat #1 along the other side.
Connect the top and bottom cuts across the board, either with a chisel or OMT (Oscillating multi tool).
Carefully cut into corners to free the 4 border pieces, as necessary. They may just pry out.
Trim the bottom half of the groove off. (I like to use a table saw and fence). You should be able to wedge it in with the tongue intact, though a small bottom bevel might assist it.
Sparingly glue along edges of existing tongues and the new board edges and weight it down, as necessary.
Best Answer
Judging by your picture, this appears to be a site-finished hardwood floor. That means it would be installed and then sanded and varnished on-site, and the clearest signal of this is that the floor is one smooth surface, with no bevels or texture changes you can feel by hand at the edges of each floorboard.
Assuming that's true, then it's almost certainly tongue-and-groove slats, nailed or stapled through the tongues. Some boards around the edges may be face-nailed. That's the most common way these floors have been installed for decades, though it's not impossible to imagine it was glued.
In any case it seems like a beautiful floor, and you can change the look by sanding, staining, and refinishing without pulling up the existing floor.