Subfloor for attic solid wood installation.


Old 12-10-19, 05:35 PM
Thread Starter
Join Date: Nov 2019
Posts: 3
Received 0 Votes 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.

Sponsored Links
Old 12-10-19, 05:37 PM
sam floor's Avatar
Forum Topic Moderator
Join Date: May 2010
Location: floor installer
Posts: 965
Received 15 Votes on 11 Posts
Either would work about the same.
Old 12-10-19, 06:53 PM
Join Date: Oct 2008
Location: New England
Posts: 10,514
Received 37 Votes on 34 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, 07:29 PM
Thread Starter
Join Date: Nov 2019
Posts: 3
Received 0 Votes 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, 09:02 AM
Join Date: Sep 2019
Location: Canada
Posts: 1,504
Received 157 Votes on 144 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.
XSleeper voted this post useful.
Old 12-11-19, 11:14 AM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 25,988
Received 666 Votes on 616 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!
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

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