Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-07-2012, 11:00 PM   #1
Newbie
 
Join Date: Apr 2012
Posts: 12
Share |
Default

sheathing blocks instead of h-clips, help needed


Hi everyone, I need some help here. I just had my roof replaced (tear off) by one of the best roofing contractors in my area. They are A+ rated by the BBB and have GAF certification. I have a gable roof with roof trusses 24" o/c and 3/8 plywood sheathing with h-clips. The roofer replaced all the sheathing along the ridge, but didn't install h-clips on the new sheathing. After researching this, I've found that blocking can be installed at the sheathing seams in place of the h-clips. I have some concerns about this, such as: How exactly is this blocking accomplished (a picture would be very helpful), is adding blocking a good substitute for h-clips, even if the blocking adds support to the sheathing, it doesn't do a thing for the expansion and contraction issue. The replaced sheathing on the ridge of my house was less than a full sheet of plywood and is only about 10" wide. I've read the narrow sections of sheathing required more support than full sheets, thus multiple h-clips are recommended on all sides. What would be the best course of action to take for area?

I want to resolve this with the roofer but I DO NOT want my roof to be compromised because of an error made by the roofer. Should I demand that he tear it all off and do it over correctly using h-clips? Thank you


Last edited by roof52; 04-07-2012 at 11:03 PM.
roof52 is offline   Reply With Quote
Old 04-07-2012, 11:09 PM   #2
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 13,734
Default

sheathing blocks instead of h-clips, help needed


Just because the BBB states that they have a A+ rating, there is information out there to show that the rating can be bought. Also any roofing contractor out there can be GAF certified. If they did not install the clips, and they are required as stated by your AHJ, I would be having the contractor come back and correct it. But first having your city inspector look at the workmanship and state if it passes or fails their inspection, so that you have something to go on, plus the city can play hell on the contractor if they really want to. But on the offside, it can cause headaches for you if they give you a Red tag. First I would go and talk to the AHJ before having an inspector come on site. Also are permits required by your AHJ before tear off, regardless who does it?

__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 04-07-2012, 11:21 PM   #3
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 25,600
Default

sheathing blocks instead of h-clips, help needed


I would never ever use 3/8 sheathing on a roof, to thin and not rated to span 24". A bare minimum would be 1/2. Only time I've seen it used that thin is on mobil homes and cheap sheds.
I also would never install a piece along that edge less then 24" wide.
With 24" spans you must use H clips. It would take way to long to do the blocking and your right it would not preset the spacing needed.
joecaption is offline   Reply With Quote
Old 04-07-2012, 11:28 PM   #4
Newbie
 
Join Date: Apr 2012
Posts: 12
Default

sheathing blocks instead of h-clips, help needed


Hi gregzoll,

I'm not familar with the initials AHJ, and there is no permits required for any type of roofing in my area. And even when the city requires a permit, they will NOT act on your behalf to force a contractor to correct their work. They will just simple not approve the work and it's entirely the responsibility of the homeowner to get the work corrected so that it received the approval from the city.
roof52 is offline   Reply With Quote
Old 04-07-2012, 11:34 PM   #5
Newbie
 
Join Date: Apr 2012
Posts: 12
Default

sheathing blocks instead of h-clips, help needed


Joe caption, thank for your reply. 3/8 sheathing 24"o/c center meets all codes here in upstate NY. What's the issue with a narrow width of sheathing at the ridge? Can you explain exactly what this blocking consists of? and possible include a photo? So, are you saying I should demand that he tear it all out and redo it using h-clips?
roof52 is offline   Reply With Quote
Old 04-07-2012, 11:38 PM   #6
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 13,734
Default

sheathing blocks instead of h-clips, help needed


AHJ = Authoritive Having Jurisdiction (ie City hall permit/inspection office/regulatory dept.).
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 04-07-2012, 11:43 PM   #7
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 13,734
Default

sheathing blocks instead of h-clips, help needed


Quote:
Originally Posted by roof52 View Post
Joe caption, thank for your reply. 3/8 sheathing 24"o/c center meets all codes here in upstate NY. What's the issue with a narrow width of sheathing at the ridge? Can you explain exactly what this blocking consists of? and possible include a photo? So, are you saying I should demand that he tear it all out and redo it using h-clips?
I would and do it at their costs if it is required. That is why I am glad that my roof decking is 1x6 boards, and there is only one area that is 3/4" Exterior rated plywood on my roof, but it is on a dormer that is the entrance to my home.

BTW, did they use any Grace Ice & Water shield for the first 3 feet above the gutters, then 30# felt, or just use the bare min? Can you post pictures of the decking from inside the attic, and from outside showing the workmanship? Especially around any penetrations such as chimney, flue, vent piping? Also, did they do proper venting on the roof, such as ridge venting if you have soffits?
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 04-07-2012, 11:58 PM   #8
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 25,600
Default

sheathing blocks instead of h-clips, help needed


http://osbguide.tecotested.com/pdfs/en/el807.pdf

3/8 Is the bare minimum to meet code.
Personaly I'd never use it on a roof with 24" spans.

Anytime I see a roof done with 3/8 sheathing it's all wavy from all the sagging between the rafters or trusses.
Trying to just get the nails into a narrow piece would not be much fun because of all the bouncing when trying to attach the shingles.
joecaption is offline   Reply With Quote
Old 04-08-2012, 12:26 AM   #9
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 13,734
Default

sheathing blocks instead of h-clips, help needed


Joe, even 1/2" is just as bad as 3/8ths. Min. should be nothing more than 5/8ths period, with OSB not being allowed. Even with Ply you have problems with it deteriorating as quickly as OSB if not covered properly.
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
The Following User Says Thank You to gregzoll For This Useful Post:
Ravenworks (04-08-2012)
Old 04-08-2012, 12:34 AM   #10
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Default

sheathing blocks instead of h-clips, help needed


Check to see if you are under the "I" Codes, they accept 3/8" sheathing (rated 24/0) or roof = 24" on center support rafter/truss, floor = not applicable. BUT, 24" o.c. require clips or edge support; first chart, second column =3/8"----footnote "d"; http://publicecodes.citation.com/ico...003_par004.htm

Without the support, you can span maximum 20" o.c. He needs to add 2x4 blocking, flat, directly under the joints of sheets, perpendicular to the rafters, tight to the sheathing.

Gary
__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Old 04-08-2012, 06:33 AM   #11
Member
 
Ravenworks's Avatar
 
Join Date: Oct 2010
Location: NE Ohio
Posts: 598
Default

sheathing blocks instead of h-clips, help needed


Quote:
Originally Posted by gregzoll View Post
Joe, even 1/2" is just as bad as 3/8ths. Min. should be nothing more than 5/8ths period, with OSB not being allowed. Even with Ply you have problems with it deteriorating as quickly as OSB if not covered properly.
Everything on my roof is 3/4" wouldn't have it any other way.
Ravenworks is offline   Reply With Quote
Old 04-08-2012, 10:07 AM   #12
Framing Contractor
 
Join Date: Feb 2009
Location: NE Ohio
Posts: 1,058
Default

sheathing blocks instead of h-clips, help needed


In 30 years, I have only installed 3/4 on a roof once. 5/8 is a nice premium upgrade, most are done with 1/2" and perform just fine. 3/4" is overkill for no good reason in my opinion.
sixeightten is offline   Reply With Quote
Old 04-08-2012, 11:36 AM   #13
Member
 
Ravenworks's Avatar
 
Join Date: Oct 2010
Location: NE Ohio
Posts: 598
Default

sheathing blocks instead of h-clips, help needed


Quote:
Originally Posted by sixeightten View Post
In 30 years, I have only installed 3/4 on a roof once. 5/8 is a nice premium upgrade, most are done with 1/2" and perform just fine. 3/4" is overkill for no good reason in my opinion.
Ummm it was free is good enough reason to use it, I don't know the name of the product but it was red and designed as sheeting.
Ravenworks is offline   Reply With Quote
Old 04-08-2012, 05:28 PM   #14
Newbie
 
Join Date: Apr 2012
Posts: 12
Default

sheathing blocks instead of h-clips, help needed


GBR in WA, Hi Gary, You stated "He needs to add 2x4 blocking, flat, directly under the joints of sheets, perpendicular to the rafters, tight to the sheathing"

Can you show me a picture or two of what this exactly looks like? This is what I invision. A 2 x 4 fitted between the 24" span of the truss, pressed tight against the sheathing edges and toenailed in place with 2 screws on each end of the 2 x 4 for a total of 4 screws per 2 x 4. Also, would it be advisable to use an adhesive sealer or glue in between the 2 x 4 and the sheathing? Does it matter if some of the sheathing has h-clips and some has blocking? What about expansion and contraction were the blocking is used? And as I said a picture of what this would look like would be very helpful.

thanks roofer52
roof52 is offline   Reply With Quote
Old 04-08-2012, 08:41 PM   #15
Member
 
Join Date: Jan 2011
Location: Illinois, Chicago area
Posts: 304
Default

sheathing blocks instead of h-clips, help needed


I have done more than a few roofs with clips and there were times we used blocking. With a small rip, the size you mentioned, I don't think expansion and contraction will be a big problem. You should make sure the blocking is installed just as you said above.

packer_rich is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Making Concete blocks bobby769 Concrete, Stone & Masonry 7 02-23-2012 07:35 AM
Surfacing open decorative blocks lakeresident Building & Construction 4 12-17-2011 04:13 PM
Building a shed on blocks jimmy21 Building & Construction 12 03-19-2011 10:15 PM
drywall over cement 'blocks' ? jthn Drywall & Plaster 3 01-03-2011 08:29 PM
Moisture on Inside of Sheathing elburritoloco Building & Construction 18 01-19-2009 08:16 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.