Soffit Venting Question - Roofing/Siding - DIY Home Improvement | DIYChatroom

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


Thread Tools Display Modes
Old 03-01-2009, 10:27 AM   #1
Join Date: Mar 2009
Posts: 1
Rewards Points: 10

Soffit venting question

Hi, I'm getting quotes on a new roof and having a ridge vent installed since I only have gable vents on each end. The house was built in 1971 and has about 6" wide aluminum soffits with not vents.

Part of my problem the last year were ice dams and I notice some rot along the eaves while looking around in the attic.

Anyway, the roofer wants to install soffit vents as well. However, this may be stupid question, couldn't I just drill groups of 1/8" or so holes following a rectangular pattern in the aluminum soffit every 3 or 4 feet along the soffit to mimic what the soffit vents would accomplish? It would be considerably cheaper but if it's not a standard solution I won't pursue it.

If this or the soffit vent solution is used, what is the spacing required between each vent?

Attached Thumbnails
Soffit venting question-noventsoffit.jpg  


Last edited by dat5574; 03-01-2009 at 12:01 PM.
dat5574 is offline   Reply With Quote
Old 03-01-2009, 12:02 PM   #2
Tom Struble's Avatar
Join Date: Dec 2008
Location: west milford n.j.
Posts: 2,786
Rewards Points: 2,002

alot of times on older homes there is a existing plywood soffit some distance up from the aluminum soffit your looking at,and sometimes the aluminum soffit was installed without cutting a venting slot in the origional wood soffit.i would encourage you to make sure you have the proper venting and i would forget the idea about drilling all those holes and use a vented soffit system it will look much better in the long run

i would use a center vent or fully vented vinyl soffit system either should give you the intake you need


Last edited by Tom Struble; 03-01-2009 at 12:05 PM.
Tom Struble is offline   Reply With Quote
Old 03-03-2009, 10:21 AM   #3
Join Date: Nov 2008
Location: Michigan
Posts: 138
Rewards Points: 75

From what I understand of how a soffit works, you can't have a gable and a ridge vent system at the same time.

1) The ridge vent type is an active sealed-type system. Heat builds up in the attic, escapes through the ridge vent, and suction draws more air in through the rafters.

2) The gable vent type is more of a passive one. Air flows from one end of the attic to the other and in doing so pulls a little air up through the rafters.

Every rafter needs some air flow to get rid of condensation, so make sure the insulation isn't packed solid to the plywood. The fix could be the plastic spacers full of holes sold by the big-box stores, or simple 1x2s levered down the rafters.

The benefits of each system probably depends a lot on the local climate.
Take the above with a grain of salt, it's just what I've heard. I'm not a roofer or engineer.

Last edited by Stillwerkin; 03-03-2009 at 10:28 AM.
Stillwerkin 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
Soffit venting vs. DCI Smart Vent JDPII Roofing/Siding 1 02-28-2009 08:42 PM
Addition Question: venting roof/crawlspace supton Building & Construction 6 01-22-2009 06:33 PM
Blocked Attic Soffit Vents on North Side - How to Improve Venting Jes Roofing/Siding 5 05-06-2008 09:35 AM
Another Ridge Vent, Gable vent and soffit question (??) davco Roofing/Siding 2 04-30-2007 11:14 PM
Soffit installation question milano Roofing/Siding 4 02-04-2006 10:13 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1