Screw pattern and size for 3/4" plywood subfloor?
#1
Member
Thread Starter
Join Date: Mar 2013
Posts: 107
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Screw pattern and size for 3/4" plywood subfloor?
Hey there, I'm getting read to screw and glue some subfloor in. I bought subfloor glue and will be putting it on the joists (should I just do a zigzag?) before I screw them in. To screw them in, I was planning on getting #8 2" fully threaded construction screws.
Is that a good idea? Should I get partially threaded instead? Should I alternate between full and partially threaded? How many inches between the screws?
Thanks a ton guys!
Is that a good idea? Should I get partially threaded instead? Should I alternate between full and partially threaded? How many inches between the screws?
Thanks a ton guys!
#2
Not sure what a "construction" screw is, but I recommend using Torx head decking screws. Partially threaded will tend to pull the wood down to the joists better. 8-10" in the field is sufficient. Now, if you are going over this subflooring with another layer, no glue and intentionally miss the joists with the next set of screws.
#4
Are you using Advantech or similar subflooring or just plywood? No big deal, just Advantech is a subfloor which is tongue and groove and is wax impregnated to prevent water damage during construction.
#5
MULTI-MATERIAL CONSTRUCTION SCREWS
and
Grip-Rite 2 in. Construction Screw (1 lb.-Box)-2GCS1 at The Home Depot
The second one looks much like a deck screw except uncoated.
The SPAX is probably much stronger, but I imagine more expensive.
I'd use the partial thread, you want to pull the layers together and a full thread can sometimes cause the upper piece to walk up slightly.
and
Grip-Rite 2 in. Construction Screw (1 lb.-Box)-2GCS1 at The Home Depot
The second one looks much like a deck screw except uncoated.
The SPAX is probably much stronger, but I imagine more expensive.
I'd use the partial thread, you want to pull the layers together and a full thread can sometimes cause the upper piece to walk up slightly.
#6
Member
Thread Starter
Join Date: Mar 2013
Posts: 107
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Thanks guys! Chandler, I looked everywhere I could for adventech. EVERYWHERE! My gosh that stuff is hard to find. All osb is generic in my area.
Weird question: let's say I can't find #8 2" coated screws. Could I use #9 2"? For some reason that size (coated) is not common.
Weird question: let's say I can't find #8 2" coated screws. Could I use #9 2"? For some reason that size (coated) is not common.
#8
Member
Thread Starter
Join Date: Mar 2013
Posts: 107
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Hahaha, hey, I'm stupid when it comes to this stuff but not that stupid; I eventually pick up on the stuff you guys tell me!
I knew it was just a slight size difference but asked because knowing my luck I'd end up ruining something due to some unknown rule lol.
Well, thanks again mr chandler!
I knew it was just a slight size difference but asked because knowing my luck I'd end up ruining something due to some unknown rule lol.
Well, thanks again mr chandler!