CD Ply.
Is the stamp on the C side or is the stamp on the D side?
Do you install said ply with the stamp down or up?
TRIGGER
CD Ply.
Is the stamp on the C side or is the stamp on the D side?
Do you install said ply with the stamp down or up?
TRIGGER
Learn how to plan, fabricate, and install a chute to conveniently send your dirty clothes from an upstairs bathroom or hallway to your laundry room below.
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Replies
Please help me settle an arguement that I had today.
TRIGGER
>>"Please help me settle an arguement that I had today.
Which side did you bet on? ;-)
"Let's get crack-a-lackin" --- Adam Carolla
I said stamp down (sheething a roof BTW).
Thanks for confirming.
TRIGGER
For CD sanded ply, C is the front and D is the back (first letter is always the front; second letter is always the back).
Stamp is on the back.
When you say "down" or "up" what is up or down in what you're building.
For roof and floor D side is down.
I've heard of some folks installing it rough side up under tiled floors to get better tile grab for tiled areas. I don't do it the way.
For OSB type products, the grade stamp will (usually) tell you which side is "up" or "down."
EDIT: just checked the APA site (should have done that first I guess) D side is not rated for weather exposure so if you are building a house outdoors ;-), C side is ALWAYS up (so stamp is always down).
"Let's get crack-a-lackin" --- Adam Carolla
Edited 5/5/2006 11:39 pm ET by philarenewal
"I've heard of some folks installing it rough side up under tiled floors to get better tile grab for tiled areas. I don't do it the way."
I think that's what the thinset instructions say, but never had any problems using the "smooth" side under tile.
Mike HennessyPittsburgh, PA
>>"I think that's what the thinset instructions say . . . .
Uh oh. Next tile job I have to remember to actually read the instructions. ;-)
PS: they must all be different. At least one manufacturer specifies "CC" or better for ply.
"Let's get crack-a-lackin" --- Adam Carolla
Which side do they put the grade stamp on the C-C ply? (Zen koan, no reply needed.)
The way I've always heard it is the grade stamp goes down. That way during the framing inspection the inspector can see the grade stamp from below.
OK!
Thanks for your support.
TRIGGER
I you want an argument to support the "stamp down" position, look at 1/2" OSB. The rough side is up - It's rough so that you don't slip when you walk on it. And the grade stamp is on the smooth side.
Better to be occasionally cheated than perpetually suspicious.
Hey! Darm good point!
TRIGGER
My next task is Struct #1 on the walls. I figure to put it stamps to the studs, mainly because I'm anal enough to think about such things. The other thought is that the outside will get covered first, so if an inspector wants to see them, they'll be available longer that way.
-- J.S.
J.S. and y'all,
Sorry to bump this dead horse again. Butt...
Sinse OSB sometimes has lines painted on the out side @ 16 & 24 and the stamp inside.
Stamp in and down.
TRIGGER
CREDIT TO BOSS HOGG.
Edited 5/13/2006 2:34 pm ET by TRIGGER
"CREDIT TO BOSS HOGG."<!---->
Do I get any milkbones ???
There's no such thing as nonexistence.
View Image
half of good living is staying out of bad situations
Wow big daddy!
Your my hero!
That makes my day!
Better than talking to Boss Hog!!!
etc.
TRIGGER
I think my wingy-dingy might be compatible with that hey-nanounanou!
TRIGGER
Trigger, theres more to the story when your laying t&G underlayment, which typically carries a cd rating.
The previous posters are correct, the d side has the stamp and goes down. The c side on underlayment has the first two plys plugged. This is important when used in a one floor underlayment system. It prevents the plywood from being damaged if for instance a lady with spiked shoes would land on a spot on the plywood where there was a void in the second ply.
So, were you the winner or loser in the bet?
blue
I was told on roof shealting to put the stamp down so the inspector can read it by walking on the slab
Sheathing for roofing is a different story Brownbagg. My post was about flooring.
blue
those two are treaded differently....
oh my....Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->
WOW!!! What a Ride!<!----><!---->
Forget the primal scream, just ROAR!!!
but that was the only story I knew.
I won as of yesterday. But he was still skepticle.
When I throw this at him, he'll cave for sure.
TRIGGER
What I love about OSB is the guys who say the smooth side is water repellant and should go up or out, except on roofs.
I was working on a project about 3 years ago with a group of framers and timmers and this argument started. I said, which side are the nailing lines on ? Rough side they answered, then that is the side I want to see if I'm the one nailing. It got really quiet.
I had this same argument with my "mentor". I even printed out the manufacturers info that showed that the rough side was a non skid surface to make it safer to walk on. That is also why 9' and 10' sheets of OSB say "not to be used for roof application" since both sides are smooth. Stamp is always on the opposite side as the nailing lines in every batch of OSB we've received.