Snow in roof vents?
#7826175
03/21/23 11:39 AM
03/21/23 11:39 AM
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MJM
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My daughter has snow coming in her roof vents, to the point when the snow melts she has a wet ceiling. She has a low profile vent with screen inside over the opening. They had this problem a year ago and had the vents, insulation and sheet rock replace. Does anyone have a idea what vent will not allow this. It does not happen every time it snow, just with strong wind and snow. 40-60 mph wind.
"Not Really, Not Really" Mark J Monti "MJM you're a jerk."
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Re: Snow in roof vents?
[Re: MJM]
#7826237
03/21/23 12:54 PM
03/21/23 12:54 PM
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It is roof vents. Not a ridge vent. About a foot square, two or three inches tall, flat on top.
"Not Really, Not Really" Mark J Monti "MJM you're a jerk."
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Re: Snow in roof vents?
[Re: MJM]
#7826241
03/21/23 01:02 PM
03/21/23 01:02 PM
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160user
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I am far from an expert but I would think a vented ridge cap and vented soffit would give enough ventilation and eliminate the problem.
I have nothing clever to put here.
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Re: Snow in roof vents?
[Re: MJM]
#7826254
03/21/23 01:22 PM
03/21/23 01:22 PM
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rats4me
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A ridge vent may be a option for you depending on the layout of your roof. The turtle type attic vents that you have are notorious for some snow getting in I don't think I have ever tore off a roof where the insulation hasn't sagged a little under the vent. It usually isnt a problem most of the time but if you are in a open high wind area I can see where enough snow could get in to do damage. All ridge vents aren't the same either so keep that in mind
Last edited by rats4me; 03/21/23 01:24 PM.
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Re: Snow in roof vents?
[Re: Skogmann]
#7826256
03/21/23 01:23 PM
03/21/23 01:23 PM
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MJM
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Curious to hear some replies also. I have a ridge cap roof vent the full length my house. I end up with small snow drifts up in the attic when we have strong south winds. I think snow shoots straight up my roof and goes in the roof vent. I need something different too. How big is small? Direction of wind and ridge could make a lot of difference I would think. That and the location of the house. She is NW Bismarck on top a hill with miles of open ground N NW. They just change the vents to the ones the roofer said he never saw snow get in, and now one year later more snow. A ridge vent may be the answer.
Last edited by MJM; 03/21/23 01:26 PM.
"Not Really, Not Really" Mark J Monti "MJM you're a jerk."
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Re: Snow in roof vents?
[Re: MJM]
#7826261
03/21/23 01:25 PM
03/21/23 01:25 PM
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Law Dog
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Some of that snow is like dust here the kind that blows out of a vehicle’s defroster when the fan is turned on in the morning.
Was born in a Big City Will die in the Country OK with that!
Jerry Herbst
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Re: Snow in roof vents?
[Re: MJM]
#7826551
03/21/23 09:15 PM
03/21/23 09:15 PM
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snowy
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I have those type of vent also but never had a problem with wet celling. I have had them covered many times but seem to clear open.
Give me a fish, I will eat for a day. Teach me to fish, I will eat for a lifetime
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Re: Snow in roof vents?
[Re: MJM]
#7826638
03/21/23 11:21 PM
03/21/23 11:21 PM
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Snow is blowing in through the screen on the vents. It builds up enough snow in the attic, that when it melts it soaks the insulation and sheet rock.
"Not Really, Not Really" Mark J Monti "MJM you're a jerk."
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Re: Snow in roof vents?
[Re: MJM]
#7826737
03/22/23 07:19 AM
03/22/23 07:19 AM
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If the opening in the top of the roof sheathing is cut too big, the extra airflow will "assist" the snow sucking in...that opening should be 1" MAX, for positive airflow, as you should have 2" MIN coming up from the bottom
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Re: Snow in roof vents?
[Re: MJM]
#7826754
03/22/23 07:39 AM
03/22/23 07:39 AM
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Osky
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I had trouble with the vents like that on my place. I glued frog skin? over them. Same stuff used on snowmobile cowling openings.
Osky
"A womans heart is the hardest rock the Almighty has put on this earth, and I can find no sign on it" Jabless in Minnesota www.SureDockusa.com
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Re: Snow in roof vents?
[Re: Mike C]
#7826764
03/22/23 07:53 AM
03/22/23 07:53 AM
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You need to get rid of those type of vents and switch out to gable vents or if you have a hip roof, ridge vents. I agree with this. If you are getting wind-driven fine snow inside the attic then the turtle-type roof vents aren't going to work (as you have already discovered). In your situation I think louvered gable vents would be best at preventing wind-driven snow from entering the attic. Continual ridge vent would be my second choice. As mentioned above, if the house has a hip roof gable vents are not an option. Ridge venting works best at removing excess heat from an attic but only if there are vented soffits on the house and clear channels from soffit to vent. I don't know how much of a concern excessive heat in the attic is in North Dakota though. Neither option will be cheap but both will be cheaper than repeatedly replacing insulation and sheetrock.
Eh...wot?
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Re: Snow in roof vents?
[Re: MJM]
#7826798
03/22/23 09:05 AM
03/22/23 09:05 AM
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Skogmann
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Curious to hear some replies also. I have a ridge cap roof vent the full length my house. I end up with small snow drifts up in the attic when we have strong south winds. I think snow shoots straight up my roof and goes in the roof vent. I need something different too. How big is small? Direction of wind and ridge could make a lot of difference I would think. That and the location of the house. She is NW Bismarck on top a hill with miles of open ground N NW. They just change the vents to the ones the roofer said he never saw snow get in, and now one year later more snow. A ridge vent may be the answer. Probably a 3 inch high drift and 2 feet long. My house is a modular home so has a marriage wall. Drift sits right on top of the two center walls. When it warms up and melts you can here it dripping. Home sits angled northwest-southeast. I have a building about 30 yards away from my house. When we get a strong southwest spring wind, the wind comes around the shed and it's almost a vacuum effect blasting at my house. My roof line is wide open to that wind.
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Re: Snow in roof vents?
[Re: MJM]
#7826806
03/22/23 09:09 AM
03/22/23 09:09 AM
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MJM
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I am not sure louvers would be the answer with the wind we get. Any louvered vents I have been around here, when it is blowing are opening and closing from the wind full time. You can hear them. I wonder about covering the screen with something. Something like this. I take it that is what Osky is talking about.
Last edited by MJM; 03/22/23 09:10 AM.
"Not Really, Not Really" Mark J Monti "MJM you're a jerk."
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