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Laying a shed floor dilemma.

Posted on 4/12/25 at 6:40 am
Posted by NatalbanyTigerFan
On the water somewhere
Member since Oct 2007
8056 posts
Posted on 4/12/25 at 6:40 am
My shed subfloor measures 12'x12' and I had intended to use tongue & groove plywood until recently I realized that the actual measurement for T&G IS 47.5" wide.
3 sheets of T&G are only 142.5" wide. Shed is 144"

Leaving me 1.5" short on the backside, if I start from the front.

Now what?

Just leave the gap in the back and not worry about it since the bottom wall plate will cover it or go with 3/4" regular plywood?
Posted by good_2_geaux
Member since Feb 2015
777 posts
Posted on 4/12/25 at 6:55 am to
I wouldn’t leave a gap.
Just get four sheets and rip two of them to 24 1/2”. Big box stores can rip them for you.
Posted by DMAN1968
Member since Apr 2019
11721 posts
Posted on 4/12/25 at 6:58 am to
Rip the T&G off one sheet and use it...do another without the T&G for the last 4 feet.

Or no T&G at all.

Posted by cgrand
HAMMOND
Member since Oct 2009
43041 posts
Posted on 4/12/25 at 6:59 am to
it’s there a compelling reason to use T&G?
Posted by NatalbanyTigerFan
On the water somewhere
Member since Oct 2007
8056 posts
Posted on 4/12/25 at 7:04 am to
quote:

it’s there a compelling reason to use T&G?

Was just always told that was the best to use for shed flooring but never heard a reason why it was any better than regular plywood.

Worked as a carpenter helper a few summers in my teens and I never saw it used on houses though.
Posted by cgrand
HAMMOND
Member since Oct 2009
43041 posts
Posted on 4/12/25 at 7:17 am to
if that shed is not perfectly square you are going to have a situation that will result in much cursing and throwing of tools.

just use regular 3/4”. It will be cheaper and go much faster and you’ll get full coverage without buying extra sheets
Posted by NatalbanyTigerFan
On the water somewhere
Member since Oct 2007
8056 posts
Posted on 4/12/25 at 8:46 am to
quote:

Just get four sheets and rip two of them to 24 1/2”

Seems like an expensive waste of material, right?
Both ripped sheets would produce a 23"x 96" leftover that can't be used anywhere.
Then I would still have to buy enough material to create (2) 24.5" x48" pieces. 47.5+ 24.5 +24.5 +47.5= 144"
Posted by good_2_geaux
Member since Feb 2015
777 posts
Posted on 4/12/25 at 8:02 pm to
Yeah your right, but thats what an extra $30 sheet? Save the scraps in the corner of your new shed for the next project or throw them out. (work bench, ramp, shelving, etc.)

Waste calculations factor into every aspect of a build. If you would see the cut offs we throw away on job sites sometimes it would make your stomach hurt haha
Posted by BoogaBear
Member since Jul 2013
6446 posts
Posted on 4/13/25 at 8:42 am to
quote:

if that shed is not perfectly square you are going to have a situation that will result in much cursing and throwing of tools.


Seconded. If it is even 1/8 of an inch off square good freaking luck

Regular plywood would make it much easier.
Posted by NatalbanyTigerFan
On the water somewhere
Member since Oct 2007
8056 posts
Posted on 4/13/25 at 9:53 am to
quote:

Seconded. If it is even 1/8 of an inch off square good freaking luck

It's square. I have obsessively measured and checked at least 7 times then I had my brother-in-law who's a carpenter check it too when he stopped by yesterday..

quote:

Regular plywood would make it much easier.

I'm seriously considering it.
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