Home>Discussions>INSULATION & HVAC>Gabel End Vents Vs Ridge Vent
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Jim Barton
Gabel End Vents Vs Ridge Vent

I own a 24'x 40' ranch style house. I recently had soffit baffles and R30 insulation installed. The contractor noticed that my gable end vents were blocked off. I have a ridge vent and 10 soffit vents. My question is this; Should I re-open the gable end vents or leave them alone? Will re-opening them cause an air flow problem?

Please advise I certainly can use advice before I have the gable end vents re-installed.

Jim Barton

MLBSF
Re: Gabel End Vents Vs Ridge Vent

this is a battle that has gone on for a long time and will continue well into the future. there's at least 3 schools of thought on this one if not more. i'm of the belief that either a ridge vent along with soffet vents "or" gable end vents are perfectly adequate. some people will argue that the more the better so why not have both. i think that the ideal venting situation is to have a ridge vent along with soffet vents, the hot air rises and goes out the ridge while pulling the fesh air in through the soffet vents creating a steady current....sounds like it makes sense to me so therefore that's what i believe. now for the gable end vents, they work sort of under the same principle, the hotter air exits through the top half of the vent and the fresh air enters in the bottom half, or in some cases it's pulled up through soffet vents if the house has them also. now, having all of them can't be that bad, i'm sure the job of venting is getting done but i guess the question that arises is, how efficient is it and are the gable end vents slowing down the current of the ridge and soffet vents. to sumarize, i'm sure you're fine as it stands now and i can confidently say that by opening up the gable end vents also will not shorten or lengthen the life span of your roof. after all, the main purpose is to keep the attic the same temp as the outside on a year round basis.

canuk
Re: Gabel End Vents Vs Ridge Vent

To add ... having gable and ridge vents could create issues of short circuiting occuring between these.
In other words air movement may only occur between the gable and ridge vents with little benifit from the soffit vents.

Jim Barton
Re: Gabel End Vents Vs Ridge Vent

I want to thank everyone who responded to my question. Every bit of information is helpful. I'm also greatfule for the quick responses since I have to make a decision about my gable end vents relatively soon.

Timothy Miller
Re: Gabel End Vents Vs Ridge Vent

Howdy, perhaps some wind blown snow entered the gable vents in the past and caused a bit of a mess. I would reopen the gable vents for cross ventilation. If snow a concern staple a furnace filter over the inside this allows air to flow but snow to skim over so wind will not blow more snow into the attic.

Oh check the code but i believe the above suggestion of a vent for ever 150 sqft is way off...

canuk
Re: Gabel End Vents Vs Ridge Vent

I agree with jkirk .... minimum of 1 sq ft per 150sq ft of floor space up in these parts ... but check with your local code.

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