I’m replacing some 5/8″ plywood with 1/2″ (roof sheathing) Is there any concern for the transition between sheets— telegraphing thru the shingles?
If so, what is the best way to deal with this?
I’m replacing some 5/8″ plywood with 1/2″ (roof sheathing) Is there any concern for the transition between sheets— telegraphing thru the shingles?
If so, what is the best way to deal with this?
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Replies
You might see it telagraphing through the shingles. My first suggestion would be to replace 5/8 with 5/8. If, for what ever reason, you can't or won't do that, use a 1/8 filler against the roof truss before laying down the 1/2" sheating.
Dave
What I got is a fire restoration. The fire dept. cut a 2' square out of the peak to fight the fire. The roof sheathing they cut was 1/2" so I planned and ordered 1/2" ( I ordered 1/2" AdvanTech and didn't get it but that is another rant)
Started tearing off the roof yesterday and found out that I got 5/8" CDX on the majority of the roof- must of used a couple of sheets of 1/2" at the peak.
2 faces of the hip roof will be completly demo'ed so no transitions. On the other 2 faces, I need to replace about 6-8 sheets. All the transition seams will be horiz. I originally thought it wouldn't be a big deal and no one would notice. Since then a few people have questioned me on it and I'm having 2nd thoughts.
Just wanted to throw it out there to see if anyone else had ever encountered a major problem with shadowing. I'm using archy. shingles so I would believe that may hide the transition better then 3 tab.
Shiming the rafter is something I didn't consider, and may be some easy insurance.
#30 felt folded a few times for thickness? From the edge up maybe 1'?
It's only six sheets, so just put 5/8" back. Your 1/2" might measure 7/16" and that would be a 3/16" difference. You might see that. Is it worth it for only 6 sheets? Shimming, for what? Get 5/8" and be done with it.Joe Carola
The good thing about the 1/2" is it is a true .500". I haven't measured the 5/8's" plywood yet where I planned on transitioning it.... but I assume it's 19/32 so the difference should be .100 not a full 1/8".
I all ready have the 1/2" sheets and didn't want to go out today and buy 16 sheets of 5/8". So I was kinda looking for some validation that the transition would be no big difference or easily remedied.
Appreciate the advise even though it's not what I wanted to hear ;-)
"I always wanted to be the last man on earth........... Just to see if all those women were lying to me"
One question I have, Is the framing 16 or 24"oc.? If it is 24 then definitely go with 5/8. 1/2" on 24" centers tends to sag between rafters/trusses, that's the other type of telegraphing that looks like crap. If it was my home , & someone used 1/2 when I have 5/8, I would feel cheated & think very little of you & talk trash about your company. No one should regard themselve as "God's gift to man." But rather a mere man whos gifts are from God.
I'm 24" OC for the most part. - Some areas will be 1'OC just because I'm keeping some marginal rafters in place rather then demoing then.
I'm using 1/2" zip roof from Huber (they don't make 5/8" zip roof) no clips, but much more rigidity then 5/8" CDX. Or so they promise.
But your breaking my heart Paul.... I would never cheat on you ;-)
Don't let anybody talk you into something that will make the wife unhappy, cause then you'll be unhappy with only half your stuff.
But your breaking my heart Paul.... I would never cheat on you ;-
Okay honey I trust you.LOL
Now you have me learning something new, I havent heard of "Huber zip roof"
sounds interesting.
Let us know how it works.
Paul No one should regard themselve as "God's gift to man." But rather a mere man whos gifts are from God.
It looks like 2' centers there and you have h-clips.I thought you also said you had 6 sheets to replace. Either way,what if when you get it inspected and they see that you have 1/2" mixed with 5/8" you run into a problem?Joe Carola
Yep 2' centers & clips. Going back with Zip roof(no clips)
I need to replace 6-8 sheets on each of the 2 "good sides. On the other 2 faces of the hip I'm replacing the whole shooting match.
I'm in a 120mph wind zone but only 20PSF requirement ( We don't get much snow)By prescription I can use 7/16"--- I think we can use 3/8" on 24" centers by code, not that anyone I know would.
Since my crew showed up half in the bag today... we didn't start decking anything.... Just got most of rafters swapped out.....Probably be Tuesday before a final decision will be made on the transition.
Just a side note... My area just adopted the IRC and is going thru some serious growing pains. No inspection on my frame. -renovation permit. But I do have to upgrade the elec. with AFCI's and linked smoke detectors.
Had an inpection last week for my temp. service.... looked like 'Grey's Anatomy' with a bunch of interns following the Dr. around (trainee's)
Begging for something to be wrong it looked like to me... Oh well.
why not just use 5/8"?
If you want to use the 1/2" stuff, I would shim under the edges of it where it abuts the 5/8". You will not see the 1/8" fade to the next truss 2 feet away. If you want to do it right then just get 5/8".
All right everybody quit telling me 1/2" is for hacks ;-)
I agree about 1/2" OSB or CDX (15/32?) Have you ever used Huber's zip roof system? My 1st time also.
I originally planned on 1/2" t&g AdvanTech but you need dispensation from the Pope to get it in my area.
If I do use the 1/2" to swap out the 6-8 sheets per good sides. All the transition seams will be horiz. nothing vertical.--I'll replace a whole coarse, not piece meal.
I plan on spraying 2" of CC foam. But I still may add a radiant barrier so foam may not go straight to the underside of the sheathing-still planning and figuring.
PS. About 30 years ago I decimated the abalone population in your back yard............... Yum fried abalone.
>>PS. About 30 years ago I decimated the abalone population in your back yard............... Yum fried abalone.
That explains all the fishermen working construction.
It is extremely unlikely that you will notice a difference, visually between 1/2" and 5/8" once it is roofed----especially if using dimensional shingles.
I have pieced in 1/2" pieces in spaces formerly occupied by 3/8" plywood countless times and could never see the 1/8" difference---so why should 1/2 to 5/8 be any different.
stop worrying and get on with it !!!, LOL,
Best wishes, Stephen