 |
09-14-2012, 07:46 PM
|
#1
|
|
Member
Join Date: Sep 2012
Posts: 62
|
roof sheathing, 1/2 vs 5/8
Is there any practical benefit from using 5-ply 5/8 ply vs 5-ply 1/2 for roof sheathing? 16" oc 2x10.
I know that 3/4 will add more weight, but my roof structure was engineered to handle a lot more weight than the difference between 1/2 and 3/4.
Plans call for 1/2, but then we decided to go with regular composite shingles rather than the heavier stuff we had speced for (wife found a color of shingle she liked better. And it's half the cost, so i'm not complaining). But since we hadn't sheathed yet, am wondering if there is any benefit for using thicker sheathing. Last longer, more resistant to damage? Or just a waste of money?
Oh, slope is 4.5 per 12, about 21 degrees. Was supposed to be 5/12 but there was a *cough* miscalculation on my part.
California, no snow load here.
Last edited by weekendwarrior9; 09-14-2012 at 07:51 PM.
|
|
|
Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. DIYChatroom.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any home improvement task!
|
09-14-2012, 08:03 PM
|
#2
|
|
Member
Join Date: Nov 2011
Location: Hartfield VA
Posts: 18,327
|
roof sheathing, 1/2 vs 5/8
Waste of money to use 5/8. Just make sure to use H clips between the rafters.
You do know three tabs are not going to last as long, More likly to lose tabs, will be more likly to leak sooner, and just do not look anywhere near as good.
|
|
|
|
|
09-14-2012, 11:41 PM
|
#3
|
|
Member
Join Date: Dec 2011
Location: B.C. Canada
Posts: 1,986
|
roof sheathing, 1/2 vs 5/8
Thicker material will stay straighter, not sag between rafters. But really it don't matter.
|
|
|
|
|
09-15-2012, 12:19 AM
|
#4
|
|
Moderator
Join Date: Mar 2009
Posts: 8,789
|
roof sheathing, 1/2 vs 5/8
No H- clips required with your 16”o.c. spacing; http://www.strongtie.com/products/co.../pscl-psca.asp
Unless you live where it rains “cats and dogs”…always check with local AHJ. Be sure to space sheathing a 10d all edges. I had to install 3/4" once, house was in take-off/landing path of airport (sound reduction).
Gary
__________________
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!
|
|
|
|
|
09-15-2012, 12:49 AM
|
#5
|
|
Member
Join Date: Sep 2012
Posts: 62
|
roof sheathing, 1/2 vs 5/8
Thanks for replies. I was about to go buy a bunch of H clips, glad I won't need them.
Yeah, 16oc, with blocking at the 4' mark, alternating bays, on a standard gabled roof.
Have 8d 1 1/2" galv roofing nails.
iirc the nailing schedule is what, 6"oc on all edges, 8"oc for field nailing for the ridge, main roof, and rafter tails, then for the gable outriggers, 4"oc edges and 6"oc field? I've heard I should use ring shank on the gables and rafter tails as well.
Silicon Valley, California, no high winds, moderate rains in winter. What's the gap between sheets for, to prevent buckling?
Last edited by weekendwarrior9; 09-15-2012 at 12:57 AM.
|
|
|
|
|
09-15-2012, 06:06 AM
|
#6
|
|
Exterior Construction
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 3,493
|
roof sheathing, 1/2 vs 5/8
I would still put in the clips. They are super cheap and do help stabilize the joints in decking.
At the end of the day, what is the cost differential between the the two thicknesses? The thicker deck will lay down flatter and stay more true over the long term as compared to the thinner decking. If both are installed properly, it shouldn't make a different either way but if the difference is $200 in lumber charges, I would do it personally.
I would also not use a 3-tab on my roof when dimensionals are that close in cost...if you were planning on that.
__________________
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|
|
|
|
|
The Following 2 Users Say Thank You to Windows on Wash For This Useful Post:
|
|
|
09-15-2012, 11:42 AM
|
#7
|
|
Framing Contractor
Join Date: Feb 2009
Location: NE Ohio
Posts: 873
|
roof sheathing, 1/2 vs 5/8
I wouldn't waste the money using the 5/8. H clips are unnecessary as well. Usually on 16 centers we will use an h clip at each end just to keep the correct spacing. A nail can be used, just remember to pull it out before you trip over it.
|
|
|
|
|
09-15-2012, 12:54 PM
|
#8
|
|
Bombastic Idiot
Join Date: Aug 2012
Location: Mesquite, Texas
Posts: 761
|
roof sheathing, 1/2 vs 5/8
I use a ring shank or candy coat for entire sheet of sheathing. Use H's their cheap, bit less bounce at seams when nailing shingles. Less bounce with 5/8 than !/2 but with 16" centers probably won't notice. Was re-roofing over old shingles on a house long ago, got a few courses up at one end was getting a lot of bounce couldn't even drive nail. broken rafter? Rotted sheath? Climbed into attic, discover 36" between two rafters. 2X6's Floating joint between next row up of sheathing.
__________________
Measure twice, cut once. Look at the nail, not the hammer. Watch the fence, not the blade. If you hook your thumb over your belt you won't hit it with the hammer or leave it layin on the saw table.
|
|
|
|
-->
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|
