Subfloor for attic solid wood installation.

Old 12-10-19, 05:35 PM
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Subfloor for attic solid wood installation.

I am going to install a solid wood floor in my attic. I have unfinished 108 year old 3/4" nailed down tongue and grove sub floor pine planks currently in my attic. Over the years the planks have been pulled up to install electrical work so a lot of the tongue and grove is damaged but not horribly so. I have seen advice for both options. Guys with experience would you:

1 - Screw down current tongue and grove flooring to joists to stiffen up, sand down to ensure even, and lay 1/2 ply sub floor to planks.

2 - pull up and reuse current 3/4" planks on another project.
lay down new 3/4" tongue and grove plywood sheets for sub floor.

3- another idea?
Both require the same amount of work, just wondering what would be best.

Old 12-10-19, 05:37 PM
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Either would work about the same.
Old 12-10-19, 06:53 PM
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Hi Richard, what is your objective?
If you are finishing that space to be living space there are many steps and approvals involved, heat, electric, egress, and moving the insulation layer to the roof, a tough step.

Old 12-10-19, 07:29 PM
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It will be a bedroom, insulation complete (icynene), electric run, PO pulled, structural assessment done for weight (working on floor now)
Old 12-11-19, 09:02 AM
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I would remove the planks and then glue and screw down 3/4 inch.

This would be the best to eliminate squeaks, at least I think it would be the best.
XSleeper voted this post useful.
Old 12-11-19, 11:14 AM
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Yes, additionally, adding subflooring on top of the existing would likely mess with the rise of the last step on your staircase, creating a trip hazard.

Assuming you can get 4x8 sheets up there, of course!

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