Subfloor for attic solid wood installation.

Old 12-10-19, 06:35 PM
Thread Starter
Join Date: Nov 2019
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
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, 06:37 PM
sam floor's Avatar
Forum Topic Moderator
Join Date: May 2010
Location: floor installer
Posts: 1,087
Received 29 Likes on 24 Posts
Either would work about the same.
Old 12-10-19, 07:53 PM
Join Date: Oct 2008
Location: New England
Posts: 10,540
Received 44 Likes on 40 Posts
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, 08:29 PM
Thread Starter
Join Date: Nov 2019
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
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, 10:02 AM
Join Date: Sep 2019
Location: Canada
Posts: 1,967
Received 249 Likes on 223 Posts
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.
The following users liked this post:
Old 12-11-19, 12:14 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Posts: 29,635
Received 1,643 Likes on 1,471 Posts
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!

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: