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 02-10-2006, 09:50 AM   #1
Newbie
 
Join Date: Feb 2006
Posts: 5
Share |
Default

Adding a Dormer


I'm adding a large dormer to an existing finished roof. When I get to roofing, is it possible cut existing roofing along the valley line and work the valley flashing up under the existing comp shingles or do I need to remove all the shingles above the new valley?
Thanks in advance


Last edited by ffishmonger; 02-11-2006 at 12:15 AM.
ffishmonger is offline   Reply With Quote
Old 02-10-2006, 07:44 PM   #2
Commercial Roofing
 
AaronB's Avatar
 
Join Date: Jan 2005
Location: Illinois
Posts: 927
Default

Adding a Dormer


Can you provide any more detail?

__________________
www.roseroofing.net/ Free inspection within 12 miles
Seamless Polyurea Roofing Membranes for Metal Roofing, Roof Leak Repair, Seamless Commercial Spray Foam Insulation, Seamless Commercial Roofing, SPF Roofing, Industrial Insulation, Our trucks are red but our roofing is GREEN!
AaronB is offline   Reply With Quote
Old 02-10-2006, 08:08 PM   #3
renovations
 
Join Date: Aug 2005
Location: Canada
Posts: 430
Default

Adding a Dormer


Unless there are unforseen details, that is what I have generally done. I cut the existing shingles so that the cut line ends up 3" from the centre of the valley. Then very carefully get any nails out that will be in the way of the flashing, pull any staples in the roofing felt and slide the flashing up after the dormer is framed and sheathed. Certainly re-roofing the whole side will give you the absolutely best job, but I have had no problems with a retro-fit.
Bonus is offline   Reply With Quote
Old 02-11-2006, 12:13 AM   #4
Newbie
 
Join Date: Feb 2006
Posts: 5
Default

Adding a Dormer


Thanks Bonus, How wide of valley flashing have you had success with in sliding under existing shingles after making your cut? I'm working with a 4-12 pitch.
ffishmonger is offline   Reply With Quote
Old 02-11-2006, 10:02 AM   #5
Commercial Roofing
 
AaronB's Avatar
 
Join Date: Jan 2005
Location: Illinois
Posts: 927
Default

Adding a Dormer


Are you adding on in the valley?
__________________
www.roseroofing.net/ Free inspection within 12 miles
Seamless Polyurea Roofing Membranes for Metal Roofing, Roof Leak Repair, Seamless Commercial Spray Foam Insulation, Seamless Commercial Roofing, SPF Roofing, Industrial Insulation, Our trucks are red but our roofing is GREEN!
AaronB is offline   Reply With Quote
Old 02-11-2006, 11:11 PM   #6
Newbie
 
Join Date: Feb 2006
Posts: 5
Default

Adding a Dormer


I am actually making a new valley by attaching a new roof perpendicular to an existing one. The attaching roof meets at the peak and eave of existing roof.
ffishmonger is offline   Reply With Quote
Old 02-11-2006, 11:41 PM   #7
renovations
 
Join Date: Aug 2005
Location: Canada
Posts: 430
Default

Adding a Dormer


I generally use 24" valley flashing with a 'w' profile, (so there's an inverted 'v' running down the center of the valley). This gives you 12" each side.

Bonus 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
Adding a dormer...estimate? wease Remodeling 2 12-11-2006 03:17 PM
Adding new circuit breakers to 100 amp sub panel DrP Electrical 8 05-25-2006 10:05 PM
Adding Dormer(s) Rusty Bottoms Carpentry 3 12-07-2005 07:31 PM
adding a second floor chubdo Building & Construction 11 04-16-2005 12:20 AM




Top of Page | View New Posts

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