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I Need Info.

 
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Old 07-24-2010, 06:53 PM   #1
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I Need Info.


I need some help from a pro .
my home has a lot of moisture under it .
we have put in new duct work with 3 inch R-8 in and it is still sweeting what do i need to do next ?
I have floor vents in place.
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Old 07-24-2010, 07:32 PM   #2
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Re: I Need Info.


I think you will be alright here. You seem legit to me.

I am not a ventilation expert by no means. But we will need to know more about your situation.

How many square feet of space?

How tall is the crawl space?

How many square feet of cross ventilation is in place?

Does you site drain away from the building?

Does your downspouts dump next to the building?

ya know that kinda stuff

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Old 07-24-2010, 07:40 PM   #3
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Re: I Need Info.


drain is good never had any water standing under or around house.
i have 1750 sq feet heat and cool.
4 and 5 block hi craw space.
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Old 07-24-2010, 07:55 PM   #4
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Re: I Need Info.


Quote:
Originally Posted by trophyhunter1 View Post
drain is good never had any water standing under or around house.
i have 1750 sq feet heat and cool.
4 and 5 block hi craw space.
I am assuming the ducts are in the crawl space.

Are there foundation vents around the perimeter of the house? If so how many and how many square feet are each one worth?

What about the downspouts? Is there a way to pipe those away from the house?

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I try to help and ya make me look like a dum-arse agian, lol
You will know when I am jabbing at you. You will be in a much worse mood than you are now.
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Old 07-24-2010, 08:03 PM   #5
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Re: I Need Info.


down spout are away from house.
i have 9 vents in craw space they are the auto vents
8 by 16 inch vents.
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Old 07-25-2010, 09:55 AM   #6
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Re: I Need Info.


I have a vision of exposed ductwork in this crawlspace, is this the case?

Is the ground in the crawlspace covered with a moisture barrier? Perhaps there is a way to contain all the ductwork with a moisture/vapor barrier after they're strapped to the floor joists? This way the ductwork becomes part of the conditioned space of the home while staying sealed off from the humid, unconditioned crawlspace. My 2cents.
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Old 07-25-2010, 10:06 AM   #7
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Re: I Need Info.


It's hard to say without more info. Pictures would help.

But basically, don't insulate the floor joists, have a VB on the ground, covered either with stone or concrete, heat the crawl space. Insulate the crawl space walls. Cover with tyvek.

Mine is exactly like this and no problems in 15yrs.
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Old 07-25-2010, 10:18 AM   #8
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Re: I Need Info.


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It's hard to say without more info. Pictures would help.

But basically, don't insulate the floor joists, have a VB on the ground, covered either with stone or concrete, heat the crawl space. Insulate the crawl space walls. Cover with tyvek.

Mine is exactly like this and no problems in 15yrs.
That is fancy, around here most are just dirt, filth form a 100 years and a few dead critters.
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Old 07-25-2010, 10:21 AM   #9
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Re: I Need Info.


Thanks. The common mistake is people insulate the floor. Heat the space, let the heat rise, also helps keep your floor warm.
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Old 07-25-2010, 10:28 AM   #10
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Re: I Need Info.


Is there anyway you can attach some pictures. Not being able to see what your situation it's difficult to help.

Jon
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Old 07-25-2010, 10:58 AM   #11
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Re: I Need Info.


Quote:
Originally Posted by trophyhunter1 View Post
down spout are away from house.
i have 9 vents in craw space they are the auto vents
8 by 16 inch vents.
I don't think you have quite enough square footage of foundation vents. I'm not saying that you need more to solve you trouble either. Around here you need to have 1 square foot of cross ventilation for every 125 - 150 square feet of floor space above. You would need at least 11 feet but if you have trouble getting good cross ventilation you may benefit from more. You only have 8 sq feet now and we don't know if that is evenly spaced around the house or not.

There are humidity controlled fans that you can place under there that come on when the humidity hits a designated level. That would increase the air exchange dramatically. But When the relative humidity is just as high outside as under the house moving the air would seem insufficient.

Fact remains, we need more info and pictures. And a real expert wouldn't be bad either.
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Old 07-26-2010, 06:40 PM   #12
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Re: I Need Info.


Vapor barrier, insulate, seal, condition.
Next!
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Old 07-26-2010, 06:54 PM   #13
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Re: I Need Info.


I have someone coming tomorrow to start drying the craw space out .
and then we are going to blast off the mold.
then try to find why it is getting so much moisture in the craw space.
some one told me to seal up all vents and put down new Vapor barrier .
if any one know any thing i need to try please let me know.

thanks
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Old 07-26-2010, 08:25 PM   #14
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Re: I Need Info.


Are the ducts insulated?

Last edited by jb4211; 07-26-2010 at 08:28 PM.
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Old 07-26-2010, 08:48 PM   #15
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Re: I Need Info.


Yes we put new ones in this last week with 3 inch in.
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Old 07-26-2010, 09:50 PM   #16
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Re: I Need Info.


Quote:
Originally Posted by trophyhunter1 View Post
I have someone coming tomorrow to start drying the craw space out .
and then we are going to blast off the mold.
then try to find why it is getting so much moisture in the craw space.
some one told me to seal up all vents and put down new Vapor barrier .
if any one know any thing i need to try please let me know.

thanks
6 mill vapor barrier neatly installed and taped under the house is a must. As many have mentioned.

I don't think you should close off your foundation vents. Just think about it. Where is this moisture supposed to escape from? This is the primary function of the foundation vent and is why you are required to have them. You need more air exchange not less.

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