DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Roofing and Siding > Ice and water protection




Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 04-18-2012, 05:13 AM  
tglombardi
Junior Member
 
Join Date: Apr 2012
Posts: 7
Default Ice and water protection

Hi all
Just wanted to get your thoughts on this. I have been roofing for about 6-7 years and have always put the ice and water protection on the first 3 feet and then the drip edge over the ice and water. After the drip edge I apply roll roofing as the starter and the the shingles. I have read that some people put the drip edge on before the ice and water protection. Doesn't the ice and water directly on the roof deck provide better protection?? My thinking was that if any ice damns were to raise the drip edge, the roof still has the ice and water protection.
Any thoughts/discussion would be appreciated!



__________________
tglombardi is offline  
 
Reply With Quote Quick reply to this message
Old 04-18-2012, 06:56 AM  
nealtw
Contractor
 
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 9,439
Liked 746 Times on 666 Posts
Likes Given: 1303

Default

I am not a rooffer but I would think your ice shield is last stopper of water when you have ice. So you are putting it there for the water that gets to it, you wouldn't want that water to go under the drip edge.



__________________
nealtw is offline  
 
Reply With Quote Quick reply to this message
Old 04-18-2012, 04:29 PM  
kok328
Supporting Member
HRT_SUPPORTER.png
 
Join Date: Nov 2007
Location: Grand Blanc, MI
Posts: 2,171
Liked 102 Times on 89 Posts
Likes Given: 61

Default

Good question, not sure about the order of installation but, here in MI the code is to have water shield from drip edge to 2' beyond the exterior wall.
So if you have 2' of soffit, you need 4' of water shield.

__________________
kok328 is offline  
 
Reply With Quote Quick reply to this message
Old 04-18-2012, 06:29 PM  
oldognewtrick
Moderator
HRT_MODERATOR.png
 
oldognewtrick's Avatar
 
Join Date: Jul 2009
Location: Nashville, TN
Posts: 4,751
Liked 375 Times on 312 Posts
Likes Given: 123

Default

All the installation specs I've seen show the drip edge installed first, then the ice and water shield. Water should always be allowed to shed with out restrictions, putting the drip edge over the water shield is like tucking your rain coat into your pants. I'm curious why you would use roll roofing as a starter? All shingle mfg's make a dedicated starter strip with a seal edge at the bottom. They spend a lot of money on research to see how all the components perform together.

__________________
oldognewtrick is offline  
 
Reply With Quote Quick reply to this message
Old 04-18-2012, 09:12 PM  
tglombardi
Junior Member
 
Join Date: Apr 2012
Posts: 7
Default

Quote:
Originally Posted by oldog/newtrick
All the installation specs I've seen show the drip edge installed first, then the ice and water shield. Water should always be allowed to shed with out restrictions, putting the drip edge over the water shield is like tucking your rain coat into your pants. I'm curious why you would use roll roofing as a starter? All shingle mfg's make a dedicated starter strip with a seal edge at the bottom. They spend a lot of money on research to see how all the components perform together.
Thanks for the input. The reason I put the drip edge over the ice and water protection is to protect the roof deck in case if water back up from ice damns. I use the roll roofing (or double coverage-half roll,half felt) as the starter because it is much larger and a better product than the 6 inch starter strips. The starter goes over the drip to allow the water to roll down if needed. The ice and water seals the deck to protect from ice backup. If the ice damns are bad like they were last winter, they can lift the drip edge up. If the shingles are installed right there shouldn't be any water hitting the ice and water. That is why I like this system. I learned it from a roofer who has been doing roofs for 35 years.
Before ice and water they used the wood starter shingles and those lasted. so the roll roofing as a starter I think is superior. We haven't had any leaks with this method, although it is probably a bit overkill.
__________________
tglombardi is offline  
 
Reply With Quote Quick reply to this message
Old 04-19-2012, 05:18 AM  
inspectorD
Housebroken
HRT_MODERATOR.png
 
inspectorD's Avatar
 
Join Date: Dec 2005
Location: Litchfield, CT
Posts: 3,986
Liked 104 Times on 88 Posts
Likes Given: 227

Default well

Sorry O'l dog...but with Grace Ice and water sheild, they want the membrane down first. This is all I ever use, we call it "human fly paper".
Here is a link,
http://www.na.graceconstruction.com/template.cfm?page=/underlayments/roofing_faqs.html&did=8#roofdrip

drip.jpg  
__________________

Just My
Made in the

inspectorD is offline  
 
Reply With Quote Quick reply to this message
Old 04-19-2012, 06:59 AM  
tglombardi
Junior Member
 
Join Date: Apr 2012
Posts: 7
Default

That is very interesting. That is why I asks the question because there doesn't seem to be a definite answer. I think the way I have been doing it works great.

__________________
tglombardi is offline  
 
Reply With Quote Quick reply to this message
Old 04-19-2012, 07:32 AM  
nealtw
Contractor
 
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 9,439
Liked 746 Times on 666 Posts
Likes Given: 1303

Default

Call me stupid but, if you have ice build up on the roof and water backs up thru the shingles, the sheild is the last line of defence.
Why would you then allow the water to get under the drip edge?
With out ice you don't need a drip edge, it make sence that if water gets to the sheild you need to to protect the wood.

__________________
nealtw is offline  
 
Reply With Quote Quick reply to this message
Old 04-19-2012, 08:17 AM  
tglombardi
Junior Member
 
Join Date: Apr 2012
Posts: 7
Default

Good point. The drip edge also provides an avenue to get into the gutter. Another overkill step I do is add 1 1/8 inch piece of pt plywood (ripped down) against the fascia board so the drip edge sits out further to avoid any water traveling backwards to the fascia. I know the drip has the lower lip the is supposed to push the water out but this ensures the water rolls into the gutter and not behind the fascia.

__________________
tglombardi is offline  
 
Reply With Quote Quick reply to this message
Old 04-19-2012, 05:40 PM  
nealtw
Contractor
 
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 9,439
Liked 746 Times on 666 Posts
Likes Given: 1303

Default

I found this line in this link (One more detail. The ice and water shield should stick firmly over the top of the drip edge on the soffit edge of the roof. )
http://joneakes.com/jons-fixit-database/1567



__________________
nealtw is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

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 On
Refbacks are On


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Whole House Sub Panel Surge Protection toofast Electrical and Wiring 1 01-17-2012 04:34 PM
Breaker Protection Plate...inside panel avatar2k Electrical and Wiring 6 11-02-2010 07:11 AM
Gfci protection mikey9626 Electrical and Wiring 3 05-18-2009 01:13 PM
Wood protection home100 Carpentry and Woodworking 1 11-25-2008 08:50 AM
Window UV protection Lee in MO Windows and Doors 4 03-30-2007 06:05 PM