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 04-02-2014, 07:34 AM   #1
Newbie
 
Join Date: Apr 2014
Posts: 2
Rewards Points: 10
Default

EPDM Roof and decking question


Im hoping someone on this forum is a retired roofer and can give some professional advice.
I have installed EPDM roof membrane on a roof before and know that there can not be gaps larger then 1/8" in the plywood. That being said, the roof I am planning on replacing is three layers of try ply covering the original metal roof which is over 100 years old. So naturally the wood planks underneath are the same age. The planks are not milled on the sides, so in some areas there are 1" gaps between parts of the planks. However, the planks are in very good condition.
My plan is to rip off the triply and metal roof and install 1 or 2" Polyiso Insulation boards. The boards would cover the gaps, add R value and make sure the EPDM doesn't come in contact with and tar products that may be on the wood.
I REALLY don't want to remove the planks and put down plywood. I have no experience with Polyiso but I am assuming that it will be stable enough to cover the gaps in the wood. I guess I'm really just looking for a confirmation.

drunknpirate is offline   Reply With Quote
Old 04-02-2014, 07:35 AM   #2
Newbie
 
Join Date: Apr 2014
Posts: 2
Rewards Points: 10
Default

EPDM Roof and decking question


F.Y.I The Planks are 1/2" thick

drunknpirate is offline   Reply With Quote
Old 04-02-2014, 11:44 AM   #3
Low Slope Roofing
 
Join Date: Jan 2011
Location: Nebraska
Posts: 606
Rewards Points: 690
Default

EPDM Roof and decking question


1" or 2" iso will span 1" gaps. If the gaps are more then 2 5/8" then 1" iso is not recommended. Make sure to get the proper screws and plates to fasten the ISO and run a nailer around the outside edge.
1985gt is online now   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
re-secure flat roof decking Dauphinee Roofing/Siding 0 07-04-2012 10:41 AM
rubber roof over tar & thoughts on quote wfmrules3 Roofing/Siding 13 10-16-2011 09:00 PM
very difficult house to vent roof help please marlowe Roofing/Siding 7 09-10-2011 11:57 AM
Install a deck on top of a EPDM flat roof. -Pjackso Roofing/Siding 16 08-02-2010 03:35 PM
2x6 Roof Decking Over Patio bjansen Roofing/Siding 4 06-17-2009 09:34 AM




Top of Page | View New Posts

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