Attic Vents/Air Flow Questions - Roofing/Siding - DIY Home Improvement | DIYChatroom


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

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

Reply
 
Thread Tools Display Modes
Old 10-05-2012, 11:40 AM   #1
Newbie
 
Join Date: Mar 2012
Posts: 22
Rewards Points: 10
Default

Attic Vents/Air Flow Questions


Guys,

The roofer/attic guy who came to look at my leaking skylight also noticed that my soffit vents were not getting enough air into the attic. He recommended some turbine vents to increase air flow and such. Right now, all I have is ridge vents. My roof is called a "hip roof". My second floor is hot during the summer and freezing during the winter, especially in one particular room which he said didn't have any flow above it in the attic. I'm getting conflicting info online that I should be getting more soffitt or turbine is useless without wind, etc. Would turbine make a difference?

Advertisement

need2speed75 is offline   Reply With Quote
Old 10-05-2012, 12:27 PM   #2
Member
 
Join Date: Aug 2012
Location: Raleigh, NC
Posts: 44
Rewards Points: 27
Default

Attic Vents/Air Flow Questions


Do you have a continuous ridge vent or individual vents near the ridge? A hip roof normally doesn't have much of a ridge, and you have to use turbines or similar vents.

I do know the importance of adequate soffit venting as I added 40% more soffit louvers, and really noticed the difference in the attic.

However, I dont understand how inadequate attic ventilation would make an upstairs room cold in the winter. That is a different issue altogether.

Al

Advertisement

AlleyG is offline   Reply With Quote
Old 10-05-2012, 12:37 PM   #3
Newbie
 
Join Date: Mar 2012
Posts: 22
Rewards Points: 10
Default

Attic Vents/Air Flow Questions


They are individual ridge vents. The guy is saying that since not enough air is coming in through the soffit, therefore, creating a vaccum and thus not enough air is leaving (I'm going to have to brush up on physics)?? This causes not enough airflow which heats/cools the attic effecting the rooms right beneath it?? The turbine vents helps circulate the air more, providng relief. I'm just trying confirm his explaination... Anyone?
need2speed75 is offline   Reply With Quote
Old 10-05-2012, 02:09 PM   #4
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 7,101
Rewards Points: 3,258
Default

Attic Vents/Air Flow Questions


Venting should always be balanced and error on the side of supply.

A 60/40 split is preferable on the intake.
Windows on Wash is offline   Reply With Quote
Old 10-05-2012, 02:23 PM   #5
Member
 
Join Date: Sep 2012
Posts: 2,203
Rewards Points: 1,662
Default

Attic Vents/Air Flow Questions


A gambling person would be betting your hip roof attic has an insulation problem rather than a venting problem.
SeniorSitizen is online now   Reply With Quote
Old 10-05-2012, 03:39 PM   #6
Member
 
Join Date: Jul 2012
Location: NJ
Posts: 377
Rewards Points: 250
Default

Attic Vents/Air Flow Questions


the article from airvent explains the concept very well in detail (http://www.airvent.com/pdf/literature/PAVbooklet.pdf).

as fariview stated, primary cause for that extreme hot/cold for your second floor may be due to incorrect installation or not enough insulation in your attic.

just so that we are on the same page, a ridge vent is at the very peak of your roof. a soffit vent is at the bottom ("eve").

you can calculate the required number of soffit vents here (http://www.todayshomeowner.com/adding-soffit-vents/)

good luck

Advertisement

allthumbsdiy is offline   Reply With Quote
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Romex wires in attic questions Lopton Electrical 6 04-18-2013 10:31 PM
Attic insulation suggestions? iwfur25 Insulation 1 07-09-2012 12:50 PM
attic stairs for attic hvac installation scrolup HVAC 1 04-15-2012 01:53 PM
Help with complicated insulation project in attic OhmZoned Insulation 12 11-19-2011 09:49 AM
attic vent questions Grimace Building & Construction 3 06-13-2009 07:59 AM




Top of Page | View New Posts