A "breathing" frame house

[constructor]

Dear, Comrades!
What about fresh air increasing a humidity you talking about?
See the table below:
Now in Kiev is about 0, 100% humidity, i.e. the air contains 4.86 g / m 3 of water.
When heated to 20 * C, the same moisture content will give only 4.86 / 17.32 = 28% of humidity. This is ideal!. And in the cold weather it will be much less.
How with this relatively dry air can drastically improve the situation with the humidity?.
You can use only a moisturizer.

[buldozer]

There will be an increase of moisture content, but not too much. The problem is still complex. The walls also play a role. On the one hand – it works by a great blotter, absorbing a moisture, on the other hand I'm afraid Billy Bones is partly right. Vents, especially if they are properly organized, play rather a negative role.
A hope, in addition to an oil paint and a vinyl wallpaper is still have an acrylic decorative plaster, which may well play a role of a vapor gap .

[baltazar]

About the gap you did not write at first.
But a vinyl wallpaper will not help you. Out of practice - there are some absolutely identical rooms (by design, location and purpose) in the same building (walls lined with a plasterboard on the frame with a gap) in some rooms - just only the plasterboard, in others – the plasterboard with a vinyl wallpaper. The paint is the same (from a single barrel). In rooms with vinyl wallpapers, there is less humidity!.

[Summer]

Once again.. I come back. There are two different gins. One is a vapor. A partial pressure operates on it- its desire is to distribute uniformly. From more to less. A relative humidity refers only to the fact that at a high humidity and a moisture content can only be achieved in the wall, a steam begins to condense and in a dew point it precipitates in the form of water.
And the water is a quite another gin. In principle, the same habits. It also aims to be distributed evenly. That's just in a porous material it is effected not by the partial pressure, but capillary forces. The wall in our case is a blotter. A moisture permeability is very high. The conditions for drying out, a relative humidity is almost 100% are very unfavorable. Therefore, from the dew-point a tiny part of the condensed moisture moves outwards. Inside is the contrary. A humidity of 20%. Everything tries to dry up immediately. Therefore, in the thickness of wall on the inside, there is less water, and the most of water, moves back. Therefore, a steam changes the direction.
Water moves back.

[Summer]

So, let us clarify know the rule.
The vapor moves outward, and the moisture between the dew point and the inner wall is moving inward.
More specifically, the moisture partly evaporates again and changes again the direction, then the vapor partially condenses again and doesn’t reach a dew point. Such is a whirlwind.
Coming into contact with the air, which is poor in water vapor, namely such air on the surface of fiberboard - all the steam is out of this air under the influence of partial pressure, and a capillary moisture rapidly evaporates. And a vapor of such volume where it is located in, there is only one way - back to the wall.
However, some small part of the steam condenses on the boards, also, most importantly, if it was a wooden crate, then the capillary moisture would partially penetrate.
But it seems she has a piece of hardware. Therefore, the moisture is locked. The water vapor permeability is another matter. The steam will find a crack, even in a vinyl. But a capillary moisture doesn’t have such possibility.

[buldozer]

And if a dew point has a negative temperature, will it affect the spreading of water through the capillaries?. Or there is a chance that moisture will turn to ice (a snow)?.
I have a lot of books in the apartment. In terms of moisture management, is it a plus or a minus?

[constructor]

You drawn a very terrible picture. In this arrangement, the house would tear (from the walls):-)). All these processes are still equilibrium: a vapor – a water. It can not be that a positive temperature served as a boundary wet or dry. A gypsum also sucks the water. It can be some effects of moisture accumulation, but the evaporation is still out.
From one manufacturer of ecowool (Excel Fibre, England) I found an interesting diagram illustrating the temperature in the frame wall and a dew point for a typical frame house (the British have the technology called TRADIS but it is nothing special).
In the picture a dew point is generally absent. This is also validated, by the way, viel in a pair of American research papers.

[expert]

I just thinking about this question. It is decomposed into elementary things. I am absolutely sure everything has been known since long time. You just have to remember the physics.
A gypsum sucks the water, and I do not argue. The steam just does not notice it. But to go back on the form of vapor it can’t exactly the same as the water can not flow backwards. The movement takes place only under the force.
In the picture a dew point is generally absent. This statement, by the way, I saw in a pair of American research papers.
Perhaps, indeed, the dew point for the wall does not exist?. More precisely, there is, but there are a lot of dew points.
The vapor, moving through the wall is cooled and at some point in the dew point becomes dry. It drains an excess water and moves on, so it is cool and drains again. And so to the very long as it does not come out.
- And if a dew point has a negative temperature, will it affect the spreading of water through the capillaries?. Or there is a chance that moisture will turn to ice (a snow)?.
I do not remember, but I think that the capillary forces do not work at below 0.
We must look into the physics.
Q I have a lot of books in the apartment. In terms of moisture management, is it a plus or a minus?
- A pit is the same natural water reservoir, as well as a book. But the water in the pit may be only when through it sometimes runs the water flow at least. Then, a hole can affect the "water-intensibility" of this space.
As the book. At higher humidity, it will pick up the moisture, but decreasing it will give it. And if the situation is stable, they will not be affected.
He looked about the capillaries.
It turns out that the freezing temperature in a capillary is not 0, but below 0.
How much lower?. It depends on the thickness of pores.

[buldozer]

Ohh, not so. The steam can not notice the plaster. Passing through the plaster, it is partially sits on the capillary walls in the form of water. And this process is equilibrium. That is, the water in the capillaries of gypsum can go in a vapors, and increase its partial pressure in the plaster. It all depends on the humidity of plaster.
But at some point, when it once again drains the water at the first point of saturation, the capillary is completely filled, and then there is no road for the vapor. All subsequent vapor will settle at this point (this is the dew point) until the capillary is freed from the water. And in the ecowool (and the wood) the capillaries are almost "intramolecular", and there is a monomolecular layer of water molecules on the surface of cellulose, which can also move out into the street. And all this water does not freeze at minus. Moreover, there are borates in the ecowool, which are dissolved in the water, further reducing the risk of freezing.
I think the water will not freeze even at low minus. The main thing is to keep it from wet, so, the water will not begin to accumulate in the interfiber spacing. There are no capillary forces.

[bill]

I believe that the structure of cellulose fibre is the same in principle as that of straw.
So, through the straw capillary the water goes, and the steam is between the straws.
IMHO through the capillaries - the finest pores.. only the water moves.
A partial pressure can’t push the vapor, I suppose. There must be other voids.
But even if you assume that I'm wrong, then, you can reach it. Do not forget that we have an evaporation, and all this moisture should be at a low humidity on the inner wall.

[Summer]

Thank you for your comments and suggestions. Another question for you. The house has a 22% humidity when the minus was on the street, it was snow. We now have a plus, the snow melted, it rains, and it is foggy. The house has a 36% humidity. According to your theory no moisture can’t go to my house from the outside, then where is it?.

[baltazar]

The water vapor in the air is greater, the higher the temperature. With an decreasing temperature, the water vapor from the air is removed. For example, in the form of fairy frost on the branches of trees. When the temperature is high, the steam gets into the air. From everywhere. For example, from non-private cups, buckets, various containers, wet shoes and other things ...

[constructor]

To breathe, to cook, to wash and to dry - this is for the house which someone lives in, I am in my short visits, to see whether everything is okay in my house.
Well, I can not come to the house, turning on the TV and warmed a cup of tea, to inhale 36-22 = 14% of humidity for 250 square meters of residential area without internal doors.

[expert]

As I understand you have a house with a heating, the stronger heating, the lower the humidity, now we have on the street + С and in the home еру heating system is not as warm, so the moisture is, respectively, higher.
and in summer you will have 70-80%.

[Summer]

At Christmas, we have lived in the house for three days. In order to increase the humidity on the first floor, I poured out two times a day almost a bucket of water on tie (no finished floor). The humidity incresed from 22 to 25%, that is only 3%. Now, there are no cups, buckets, wet shoes and containers with the water in the house, and other things, no one pours the water, but the humidity is increased by 14%.

[Summer]

So, one summer has already passed. The house was very comfortable and cool. Believe me, even without a hygrometer one person is able to determine dry or humid in the room in many ways. So, 70-80% - this is where the house is damp. You can believe me that my house was not wet in summer or in autumn. I turned on the heating in the month of December, when the outside temperature was minus. What do you mean about different heating?. If you can, explain me, please. What I understand is when on the street was a decent minus, the furnace turned on every 20 minutes, and it is now rarely swiched on (then and now the thermostat is at 20 degrees).
Further, on the basis of your message, the smaller the temperature difference between the street and the house, the more humidity is in the house. It was so happened, but I just can not figure out if nobody lives in the house, and, I was proved it here then the moisture couldn’t get there from the street, then where from it?.

[expert]

One more time. The higher the temperature, the greater the amount of water vapor is contained in the air. When using a heating, just a huge (by comparison with the number of "breathing through the wall") amount of air is released through the chimney. What kind of suggestions for answering the question - what is filled?. I think the air is sucked in from the street. And the higher temperature on the street, the smaller air and so it is more humid.

[constructor]

The air is able to absorb the water. In a form of gaz. A vapor is a water, something that did not fit into the air. But the air appetite depends on its temperature.
The colder air, the less water it can get. And conversely, the warmer it is, the more hungry.
When in winter it is cold and hungry, coming in a warm room, he wakes up the appetite, and he vigorously began to take water from the premises.
Then it releases through a ventilation on the street. On its place immediately enters the new cold. No until it warms, it still does not know that it is hungry.
When the weather is warm outdoor, the air becomes not so cold and hungry.
So, I imagine the process of drying air in the house in winter.
And more ventilation in the house, the drier air in the house.

[Summer]

Yes, there is a ventilation in the house, no matter what kind of, doors, windows, chimneys. So, in general, there should be a ventilation!!.
In the cold air, a humidity is below 50%, then falling into the room, it becomes hot, but in a warm air in the same volume there is much more water vapor, respectively, the humidity drops to 25% and so on, and the greater temperature difference, the lower humidity.
A comfortable humidity in the house during the winter is about 40-50%, and 50-60% in summer.
In reality it is very difficult to achieve it. (not using humidifiers and dehumidifiers).
p.s. a textbook of physics, 8th grade.

[buldozer]

I have in all rooms the air vents with separate air ducts, they are all derived through the attic into a separate box on the roof. However, builders have closed this box with a polyethylene, since I have not ordered a wind vane, and the snow and the rain fell through it into the attic. So, I do not know, do I have a release of exhaust air through the ventilation on the street or not.