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 10-30-2009, 04:51 PM   #1
Member
 
Join Date: Jun 2009
Location: San Diego, CA
Posts: 195
Share |
Default

new sheathing on top of old?


When I redo my asphalt shingle roof, I'll be stripping it first, and then I'll need to replace an unknown amount of sheething. If it turns out that most of it needs to be replaced, would I be advised to remove all of the old stuff or layer on top?

tns1 is offline   Reply With Quote
Old 10-30-2009, 05:13 PM   #2
Member
 
Join Date: Jul 2007
Posts: 1,500
Default

new sheathing on top of old?


I'd remove the bad to make sure the deck is fllat and secure.

jogr is offline   Reply With Quote
Old 10-31-2009, 12:19 PM   #3
Member
 
Join Date: Jun 2009
Location: San Diego, CA
Posts: 195
Default

new sheathing on top of old?


I guess what I was wondering is if layering new osb on top of my existing plywood would even be permissible from a load standpoint. Are the load calcs based on what the framing will bear or just what the sheething will bear?
tns1 is offline   Reply With Quote
Old 10-31-2009, 05:48 PM   #4
Member
 
Join Date: Oct 2009
Location: Wisconsin
Posts: 132
Default

new sheathing on top of old?


You will have to check with your local building codes. From an added weight standpoint, I would assume it to be against codes. I have never done it like that but I usually rather do things right the first time.
BamBamm5144 is offline   Reply With Quote
Old 11-01-2009, 06:31 AM   #5
Residential Roofer
 
Slyfox's Avatar
 
Join Date: Jun 2008
Location: Struthers, Ohio
Posts: 803
Default

new sheathing on top of old?


If you replace any bad / rotted sheathing with the same type,
than cover over all with a lighter weight / thickness you should be fine.

But that's assuming there's no structural damage, bad trusses, etc.

You do not want to cover rotted lumber with new tho.
__________________
God Family Country Work Play
Facebook <> Twitter
Slyfox Exteriors Co.
Slyfox is offline   Reply With Quote
Old 11-01-2009, 10:28 AM   #6
Member
 
Join Date: Aug 2009
Location: Seymour, TN
Posts: 41
Default

new sheathing on top of old?


Agree with Slyfox. You never cover bad wood with good wood. Tear up the bad and replace.

ausblake 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
New roof and Sheathing - Install new fascia before or after? hartkem Roofing/Siding 2 06-01-2009 12:12 PM
Moisture on Inside of Sheathing elburritoloco Building & Construction 18 01-19-2009 08:16 PM
Confused with code requirements about structural sheathing. Clutchcargo Building & Construction 19 11-20-2008 09:17 AM
Please, help with sheathing and stud placement Mrmusic Building & Construction 2 09-10-2008 04:52 PM
roof sheathing placement dmend Roofing/Siding 1 03-20-2006 09:03 PM




Top of Page | View New Posts

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