High humidty in House 72% Rh, creating mold to leather shoes in closet.

[James E. Braun, CMI]

I not arguing with most of what you are saying just you are looking at it the wrong way. Mold can grow with that much moisture in the air.

When warm air and cool moisture meet that is when you get most of your moisture. This is how rain is formed in the atmosphere. A home is no different. When the air gets full and cannot carry any more water or when the air flow is slowed down, restricted or stopped, that is when the air releases the moisture.

[Robert Ernst]

This is a greater problem than just the closet. He stated in the first post that the house was musty. This is due to moisture. Especially if it's an older house the natural air changes per hour should have cleared out some of the musty odors and the interior moisture. The issue is the moisture in the house is coming in faster than it can get out. I would bet the closet was close to the same moisture level as other parts of the home, the fact is that if it's over 60% humidity your giving the mold the moisture it needs. The closet happens to be dark and a better condition to grow the mold. This issue is likely from one or more problems. The people are adding the moisture into the home with showers or dryer not vented outside. Large number of plants in the home or the house is just to tight. I would bet it's more of a issue with moisture under the home. To much moisture and not enough ventilation or no plastic. Possibly add poor site drainage even if it's a slab can cause issues inside the home. More info needs to be gathered before a conclusion is made.

[David A. Andersen]

Again, I said: "I never said it wouldn't."

How do you figure I'm looking at it the wrong way when I never said it wouldn't cause mold. Do I have to spell this Canadian?

When warm air and cool moisture meet that is when you get most of your moisture.

Your the one looking at it the wrong way! You don't "get" moisture, it's already there. It doesn't have to change state for the mold to grow. The same amount of moisture is there no matter what state it is in, liquid or vapor. The # of Btu's change, the moisture does not. Water vapor diffuses into the shoes and building materials depending on how hygroscopic they are.

When the air gets full and cannot carry any more water or when the air flow is slowed down, restricted or stopped, that is when the air releases the moisture.

Air releases moisture when it stops? So fast moving air can hold more water than slow moving air? I don't see no air flow factors on the psychrometric chart! In all actuality, the higher the air flow the greater amounts of moisture will be absorbed by the shoes in the closet. It's about vapor pressure. Higher vapor pressure in the air moves to lower pressures in the shoes. The more air movement, the more vapor at a higher pressure will contact the shoes.

It doesn't have to rain for mold to grow.

[David A. Andersen]

This is a greater problem than just the closet.
Yes it is, but we have no further "factual" information to base any other "assumptions".
　
Especially if it's an older house the natural air changes per hour should have cleared out some of the musty odors and the interior moisture.
How can you clear out moisture with moisture laden air of the same volume?

The issue is the moisture in the house is coming in faster than it can get out.
How can you have moisture coming in at a greater rate when the moisture level is the same inside and out?

I would bet the closet was close to the same moisture level as other parts of the home,
you're probably right.

the fact is that if it's over 60% humidity your giving the mold the moisture it needs.
Absolutely.

The people are adding the moisture into the home with showers or dryer not vented outside. Large number of plants in the home or the house is just to tight. I would bet it's more of a issue with moisture under the home.
　
To much moisture and not enough ventilation or no plastic.
　
Possibly add poor site drainage even if it's a slab can cause issues inside the home.
Are you saying that the inspector did not inspect plastic vapor barriers, site drainage, water intrusion under the house, inadequate shower ventilation.

More info needs to be gathered before a conclusion is made.
Seems that a lot of conclusions are being made here without any supporting information.

We provide you with more information that can be factually proven and you want to make up stuff instead.
This is what the psychrometric chart is supposed to look like if it's 90° outside and the air conditioner is running.

[David A. Andersen]

This is what it would look like if you were dumping steam from the shower, had a dryer vent leak, had a massive roof leak, ran the whirlpool tub 24/7 , had a marijuana grow operation in progress etc.

[James E. Braun, CMI]

Originally Posted by dandersen

Again, I said: "I never said it wouldn't."

How do you figure I'm looking at it the wrong way when I never said it wouldn't cause mold. Do I have to spell this Canadian?


Your the one looking at it the wrong way! You don't "get" moisture, it's already there. It doesn't have to change state for the mold to grow. The same amount of moisture is there no matter what state it is in, liquid or vapor. The # of Btu's change, the moisture does not. Water vapor diffuses into the shoes and building materials depending on how hygroscopic they are.


Air releases moisture when it stops? So fast moving air can hold more water than slow moving air? I don't see no air flow factors on the psychrometric chart! In all actuality, the higher the air flow the greater amounts of moisture will be absorbed by the shoes in the closet. It's about vapor pressure. Higher vapor pressure in the air moves to lower pressures in the shoes. The more air movement, the more vapor at a higher pressure will contact the shoes.

It doesn't have to rain for mold to grow.

What do you actually think allows moisture to stay in the air?
Think of it like this: A chicken hawk can soop down on a rabbit and lift it into the air. A chicken hawk cannot lift a rabbit into the air taking off from the ground. That is why you cannot use your chart for this, the chart does not take in all the factors.

You actually think there is the same amount of moisture in the air of Arizona and the state of Washington?

[James E. Braun, CMI]

Your chart would be more closer to be right if the house had a high velocity air system but other than that living in the air handler on the average HVAC would the chart be right.