Drip edge question


  #1  
Old 04-08-06, 04:43 PM
allenb
Visiting Guest
Posts: n/a
Drip edge question

I am about to start laying shingles and I would like to know if it is best to install the drip edge first then felt/shingles or felt/shingles ,then drip edge?
Also,is the drip edge nailed or glued on?Thanks
 
  #2  
Old 04-08-06, 06:10 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Posts: 27,026
Received 1,900 Upvotes on 1,706 Posts
Drip edge is most often installed first, and is nailed right on top of the felt. When you cut the shingles, you cut them about 1/2" beyond the drip edge, not even with the drip edge.
 
  #3  
Old 04-10-06, 02:04 PM
D
Member
Join Date: May 2005
Location: Central Florida
Posts: 196
Upvotes: 0
Received 0 Upvotes on 0 Posts
Good question as I have seen it both ways. However, Owens Corning instructions show drip edge over the felt on the sides and drip edge under the felt on the eaves.

http://www.owenscorning.com/around/roofing/pdfs/Done_Oak_Install.pdf

DWC
 
  #4  
Old 04-10-06, 08:05 PM
Join Date: Jul 2002
Posts: 274
Upvotes: 0
Received 0 Upvotes on 0 Posts
Originally Posted by dwcurry
Good question as I have seen it both ways. However, Owens Corning instructions show drip edge over the felt on the sides and drip edge under the felt on the eaves.

http://www.owenscorning.com/around/roofing/pdfs/Done_Oak_Install.pdf

DWC
This is generally correct.

The drip edge goes over the felt at the rakes (sides) so that any wind driven rain will go over the drip edge and onto the top of the felt. Otherwise, wind driven rain will blow under the felt.

Then the drip edge at the eaves goes under the felt so that any water on the felt will run down the roof and flow over the drip edge.

If the drip edge at the eaves is over the felt, then any water that makes it under the shingles and runs down the felt will then go under the drip edge and rot your fascia.

Some roofers in the north will disagree with this because the formations of ice dams complicates the issue as it backs up under the shingles.

I would go with the shingle manufacturer's recommendation.

Good luck
 
  #5  
Old 04-10-06, 09:18 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Posts: 27,026
Received 1,900 Upvotes on 1,706 Posts
Just to add to the points that Nomad brought up... if using an adhesive membrane as many ice and water shields are, most recommend that membrane be applied directly to the sheathing and over the fascia edge in order to protect it. Then when the drip edge is added, another layer of ice and water shield should be applied over the drip edge. (as an example, see Grace's illustration at: http://www.na.graceconstruction.com/custom/underlayments/downloads/iwsdet_102.pdf)
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: