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-   -   To ridge vent or not to ridge vent? (http://www.diychatroom.com/f9/ridge-vent-not-ridge-vent-175337/)

JTF 03-23-2013 05:45 PM

To ridge vent or not to ridge vent?
 
1 Attachment(s)
We have a 20 year old house in Austin, TX with a wind damaged, crummy, 3-tab builder's roof. I have taken two bids for a standing seam metal roof.

One guy wants to put in a ridge vent. The back half of the roof is a large section with no gables or dormers. It has 8 soffit vents. The front half of the roof has three large gables with only one soffit vent and precious few areas to add more.

The other guy says a ridge vent won't really work right because of the lack of soffit vents in the front and recommends several turtle vents on the back with typical side gable vents.

Who is right?

joecaption 03-23-2013 05:55 PM

Both styles need a soffit vent.
A ridge vent would sure look a whole lot better then a bunch of other vents and vent a whole lot more air.

Some of the slate looking shingle like this would look a whole lot better.
http://www.gaf.com/Roofing/Residenti...r/Grand_Slate/

747 03-23-2013 07:15 PM

Your house is perfect for a ridge vent. Just add some soffit vents.

joecaption 03-23-2013 07:28 PM

I can see at least three areas that should have had soffit vents on the front.

JTF 03-23-2013 07:34 PM

Quote:

Originally Posted by joecaption (Post 1144115)
Both styles need a soffit vent.
A ridge vent would sure look a whole lot better then a bunch of other vents and vent a whole lot more air.

Some of the slate looking shingle like this would look a whole lot better.
http://www.gaf.com/Roofing/Residenti...r/Grand_Slate/

Well the back roof has a total of 11 roof penetrations from plumbing and heating vents. Adding a few more vents probably won't matter. Also the back roof is not really visible except from some high vantage points several thousand feet away. The backyard is a fairly steep slope down to a creek so it is next to impossible to see it.

As far as adding more soffits in front, the only place to add is around that area above the front door. However I can tell you that it is connected to the main attic area only by a small constricted opening. The other tiny soffit areas may or may not have any air connection to the attic. I have not yet checked that out.

We are going with metal roofing because we plan to remodel the the exterior of the house to a much more modern/contemporary and less traditional style.

JTF 03-23-2013 07:38 PM

Quote:

Originally Posted by joecaption (Post 1144187)
I can see at least three areas that should have had soffit vents on the front.

Yeah so much for crappy mass produced builders homes. The only vent in the front is on that small soffit on the left side. I guess we will add them wherever we can.

Thanks for the advice everyone.

AndyWRS 03-25-2013 09:06 PM

"Some of the slate looking shingle like this would look a whole lot better.
http://www.gaf.com/Roofing/Residenti...r/Grand_Slate/ "

+1

That would look 10 times better.

RWolff 03-25-2013 10:17 PM

Quote:

Originally Posted by JTF (Post 1144191)

We are going with metal roofing because we plan to remodel the the exterior of the house to a much more modern/contemporary and less traditional style.


I vote for a ridge vent, can't have too much ventilation but you can sure have too little and the top of the ridge is the ideal place since heat rises.

What kind of metal roof?
I'm researched the metal shingles by PermaLoc and bought a box to look at, I have to re do my roof now after only 8 years due to DEFECTIVE Certainteed 3 tab 30 year shingles. I filed with the class-action suit last year and received a check for almost $1,200
The 3 tab roof materials cost me about $900, so in effect they paid me about a 120% refund on the shingles.

I had covered the entire deck with Tamko moisture guard and there are no leaks but the shingles are going bad in the sunny locations.

Windows on Wash 03-26-2013 07:27 AM

Ridge vent. Plenty of area for soffits on the front and if the back is more continuous without the dormers, they will be perfect as well.

In Austin, we are a bit less worried about the ice damn potential than we are the total circulation and balance of ventilation.

JTF 03-31-2013 02:12 PM

Quote:

Originally Posted by Windows on Wash (Post 1146030)
Ridge vent. Plenty of area for soffits on the front and if the back is more continuous without the dormers, they will be perfect as well.

In Austin, we are a bit less worried about the ice damn potential than we are the total circulation and balance of ventilation.

Yes the back is continuous with no dormers. The gables in the front are made of trusses with partial vaulted ceilings. I'm going to assume there is batt insulation between the ceiling and the roof deck - so no airflow there.

I take it that a ridge vent wants a balanced intake for optimal operation. However, I figure they still work in this situation when one side has a much better flow than the other?

BTW we may be backing away from the metal roof (standing seam). It's so expensive that, while we can afford it, it leaves us less money to make other improvements.

RWolff 03-31-2013 03:24 PM

Quote:

Originally Posted by JTF (Post 1149738)
BTW we may be backing away from the metal roof (standing seam). It's so expensive that, while we can afford it, it leaves us less money to make other improvements.

I opted for the Perma-lock aluminum locking shingles, it may be less than the standing seam but will be more than 3 tab.

robsatx 04-02-2013 08:37 AM

hmmm
 
I am doing some home improvement also, House is 15 years old and wanting to replace roof, add a patio cover and redo the kitchen. O yea, some landscaping . . I was wondering how much is the standing seam tin quote? Any negatives to ridge vent?

Gary in WA 04-04-2013 11:38 PM

JTF, you mentioned high winds; http://www.google.com/#hl=en&output=...iw=847&bih=483

Depends on how accessible the roof is, if HVAC/ducts are in attic, tray ceilings, dormers/rake ceilings, etc. to go unvented; http://www.buildingscience.com/docum...on?full_view=1

1" rigid foamboard between rafters; http://publicecodes.cyberregs.com/ic...006_par003.htm

With R-25, use the existing f.g. on the attic floor to meet R-30 total; http://publicecodes.cyberregs.com/ic..._11_sec002.htm

Or just add more venting, top/bottom and hope it says intact. Check with local AHJ.

Gary
PS. IMHO, the lop-sided venting will pull air from the easiest source (unobstructed).

JTF 04-06-2013 06:06 PM

Quote:

Originally Posted by robsatx (Post 1150814)
I am doing some home improvement also, House is 15 years old and wanting to replace roof, add a patio cover and redo the kitchen. O yea, some landscaping . . I was wondering how much is the standing seam tin quote? Any negatives to ridge vent?


The quote for the standing seam was around $12k from two different roofers. That was with a tear off of the existing roof. It included drip edge which the house does not currently have.

747 04-07-2013 12:35 AM

Quote:

Originally Posted by JTF (Post 1153767)
The quote for the standing seam was around $12k from two different roofers. That was with a tear off of the existing roof. It included drip edge which the house does not currently have.


Not a bad price for a metal roof. Also you will never have to replace it again.


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