Proper Venting Of New Roof On Attached Garage - Roofing/Siding - DIY Home Improvement | DIYChatroom

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


Thread Tools Display Modes
Old 11-26-2009, 02:46 PM   #1
Join Date: Nov 2009
Posts: 21
Rewards Points: 10

Proper venting of new roof on attached garage

Good day,

I have recently replaced a low slope (almost no slope) roof on my attached garage with a sloped roof. See attached "Microsoft Paint" doodle! The low slope was leaking badly and was suggested to replace it with a sloped one. Anyway, it is basically a sloped roof coming down from my home over top of my attached garage. I am wondering about the best method to insulate and vent. My own common sense tells me to create a sorta "attic" in the upper area of the new roof, and install those outside vents on either end of the newly created "attic" section. Also, run those rigid styrofoam venting channels down between the rafters to the soffits, insulating with the fiberglass overtop of the venting channels, and then vapor barrier. Does this sound like a reasonable solution, and if so, how often do I have to run the venting channels (ie: between every rafter, every second rafter, etc).

Am I going overboard here, or is this what should be done?

Any guidance would be appreciated!


- Joe
Attached Images


jlatulippe is offline   Reply With Quote
Old 11-26-2009, 03:24 PM   #2
Remodeling Specialist
Join Date: Jan 2009
Location: Derry NH
Posts: 69
Rewards Points: 75

Vent channels go in every rafter bay to prevent the insulation from touching the plywood any where that would be possible but not needed anywhere else. try to have an equal amount of air venting at the roofs bottom edge as at the top or ends. they do make a shed roof vent system so you could conceivably "ridge vent" at the top across the house wall.

Good luck


We do everything with quality and care
Baron is offline   Reply With Quote

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Garage Roof Suggestions NeedSuggestions Building & Construction 13 10-03-2009 08:29 PM
roof venting cathedral ceiling Pete H Roofing/Siding 16 09-29-2009 02:26 AM
The moving Ice Dams after using a roof rake ?? Canufixit Roofing/Siding 9 02-05-2009 07:33 PM
Flat roof questions, advice, ballpark estimate JerryH Roofing/Siding 18 11-07-2008 04:08 PM
advice for insul./vent. of garage roof? King Dark Lake Roofing/Siding 3 04-15-2007 01:37 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1