Tying A Metal Roof Into A Shingle Roof - Roofing/Siding - DIY Home Improvement | DIYChatroom
Advertisement


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

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

Like Tree2Likes
  • 1 Post By Nealtw
  • 1 Post By BigJim
Reply
 
Thread Tools
Display Modes
Old 09-10-2019, 10:39 PM   #1
Member
 
Join Date: Nov 2007
Location: Iowa
Posts: 1,230
Rewards Points: 60
Default

Tying a metal roof into a shingle roof


We have a shingle roof at about a 6/12 pitch over our garage. Want to add a covered porch behind it. Covered porch will be about a 4/12 pitch. So will be framing it up with 2x6s and then 1x3s on top to screw the metal panels to. Question is how to tie the new metal roof into the shingle roof? Obviously I will have to try and lift up some of the shingles and then I'm guessing use some flashing tucked up under the existing shingles and then on top of the new metal panels? Or is there a better way?
ponch37300 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-10-2019, 10:50 PM   #2
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 26,372
Rewards Points: 20,634
Default

Re: Tying a metal roof into a shingle roof


Quote:
Originally Posted by ponch37300 View Post
We have a shingle roof at about a 6/12 pitch over our garage. Want to add a covered porch behind it. Covered porch will be about a 4/12 pitch. So will be framing it up with 2x6s and then 1x3s on top to screw the metal panels to. Question is how to tie the new metal roof into the shingle roof? Obviously I will have to try and lift up some of the shingles and then I'm guessing use some flashing tucked up under the existing shingles and then on top of the new metal panels? Or is there a better way?
How are you tying the structure to the building?
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-10-2019, 11:45 PM   #3
Member
 
Join Date: Nov 2007
Location: Iowa
Posts: 1,230
Rewards Points: 60
Default

Re: Tying a metal roof into a shingle roof


Quote:
Originally Posted by Nealtw View Post
How are you tying the structure to the building?
Going to run 2x6s as rafters and will land on the garage trusses. This porch roof won't be big or have much weight on it. My main concern is how to tie the new metal roof into the existing garage shingle roof and how to flash that.
ponch37300 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-11-2019, 12:07 AM   #4
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 26,372
Rewards Points: 20,634
Default

Re: Tying a metal roof into a shingle roof


Quote:
Originally Posted by ponch37300 View Post
Going to run 2x6s as rafters and will land on the garage trusses. This porch roof won't be big or have much weight on it. My main concern is how to tie the new metal roof into the existing garage shingle roof and how to flash that.
I would want about 10" of flashing on the 6/12 with half of it under the upper shingles. And seal the bottom of the flashing to the metal roof so the wind can't blow water up there.

Roofers will be along.
Attached Thumbnails
Tying a metal roof into a shingle roof-pon-1.png  
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Old 09-11-2019, 12:21 AM   #5
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 26,372
Rewards Points: 20,634
Default

Re: Tying a metal roof into a shingle roof


Have you seen this.

roofermann likes this.
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Old 09-11-2019, 04:20 AM   #6
Member
 
roofermann's Avatar
 
Join Date: Nov 2013
Location: Roanoke, VA
Posts: 433
Rewards Points: 677
Default

Re: Tying a metal roof into a shingle roof


Great example, Nealtw. Ideally the shingle roof potion of the transition flashing should extend past where the bottom row of shingles is nailed.
roofermann is online now   Reply With Quote
Old 09-11-2019, 07:16 AM   #7
Member
 
Join Date: Aug 2011
Location: Washington, DC area
Posts: 1,429
Rewards Points: 2,761
Default

Re: Tying a metal roof into a shingle roof


Presumably the OP will be adding a new downspout?
huesmann is online now   Reply With Quote
Old 09-11-2019, 07:25 AM   #8
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 12,682
Rewards Points: 1,668
Blog Entries: 1
Default

Re: Tying a metal roof into a shingle roof


Quote:
Originally Posted by Nealtw View Post
Have you seen this.

I did mine just like that and it leaks, not in the house but runs down onto the asphalt shingles under the metal roofing. I would suggest making the bends in the flashing and at the transition point closer. I had to install an additional flashing under that flashing to make it stop leaking and it still leaks with a really hard rain.

It doesn't hurt anything as it just slightly drips on the treated, sealed floor of the porch. Make sure the rubber gromet that goes under the metal flashing onto the metal roof is back away from the edge of the flashing. You want as much flashing over hanging the gromet as possible.
Nealtw likes this.
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
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





Top of Page | View New Posts