A "breathing" frame house

[constructor]

In this subject you talked about the need of a fresh air in well insulated rooms of a frame house.
It seems to me the following construction of the supply valve on the basis of the heater from hemp fibers of Steico company in the form of inserts into the wall, the size is about 100 x 400 mm with an outside air fence and the heating of the output air into the room.

[baltazar]

Please, tell us something in the same vein about a hardboard.
More specifically, about that one with a mesh on the one hand, on a "wet" technology.
Can it be applied in a " pirogue"?. Would it be a breathing through the walls overly harmful?. Whether it has a high breathability?.
You mentioned the fiberboard in the wall. This is not about the canvas?.

[expert]

To combine a drywall and a plywood is quite dangerous, it is better to use two layers of drywall (reinforcing a frame) or to use a special coated plywood for painting. The membrane seems overkill.

[bill]

1. A batten 180-200 rubles for sq.m.
- It depends on a type and a length. 2-3 meters are much cheaper than 6-meter, for example. well, a lot of other options.
2. A construction paper 2 rubles s for sq.m.?. It is about 5 – 6 rubles.
3 . An ecowool, the thickness of 150 mm - 315 rubles for sq.m.
with a blowing, It will be cheaper if you DIY about 150 rubles for sq.m. I think if you DIY it will be a little more expensive about 160 – 170 rubles (a retail price, a density of hand-laying is higher).
4. Either the board 20 mm with a paper and a windscreen 120 rubles for sq.m. That is longer in a job but less vapor permeable?.
as for the a price it will be even cheaper, perhaps, but I also advise you to see the prices of a SOFTBOARD. A windscreen Izoplat is almost twice more expensive (>200 rubles for sq.m).
Or a plywood WBP 9 mm for 180 rubles for sq.m. or 6.5-mm?. for 140 rubles for sq.m.
Or a windscreen SOFTBOARD 90 rubles for sq.m.
As for me, probably, I am leaning towards the latter option.
5. Bars.
6. A DSP 10mm – 170 rubles for sq.m.
I can not imagine how good will the DSP as the exterior siding ...
In principle, everything is possible, but a DSP is exceedingly difficult. But your are good fan!! because you building yourself.
regards..

[constructor]

In general, there is no synthetic canvas in a binder. Only its own "wooden" lignin. By the way. The OSB (oriented strand board) is very different. It feels like a Glyunts Europian is much better than Canadian, but it is also more expensive, of course. But at least it smells like a tree. Our OSB were loved by wasps and bees, and a more perfect gas analyzer than from the insects has not yet been invented.

[baltazar]

1. The class issue is a limited norm. An emission indicator of a qualitative plywood is significantly below the norm, while the OSB is - close.
2. From Europe, Canada, China, etc. a lot of things were being taken.
3. Everywhere in the world a plywood is more expensive than a OSB but why?, Why do the people produce it and who does buy?.

[bill]

And, tell me, please, how does the house breathe?. Maybe there is no need at all?.

[Summer]

But others, built the houses!
And what about flies?. Are they afraid of?.
But they are collecting it not for the honey!. They are making houses made of cellulose (from OSB)!. Eco-friendly! And they are not going to die.
Here you are, as I understand it, a professional builder. You've seen a lot of domestic plywood MDF with a class E1?. Now, I do not know the market, but two years ago, when I thought of what to build the house, so I didn’t find such plywood, but an imported plywood was more expensive for 40%. And you do trust the certificates of our vendors?. I do know that our chemical industry (and these are a phenol-formaldehyde, a phenol, an urea and other resins) is worse than the European and the North American chemical industry is the best in the world. And what about a compliance technology of plywood?.
A plywood with the emission class E2 - this is up to 10 mg (as E1 below 10 mg).
Its production is expensive, so the price is higher. And, of course, the plywood is stronger than OSB. It is even can not be questioned. For the floor it is certainly better than a plywood. And for the walls the strength is enough for the OSB.
Incidentally, I have not even seen any really scientific articles, which having proved the water vapor permeability of plywood was higher than that of OSB. Everithing I have seen, and that the links were given in this forum – there were purely marketing articles, where the key points are covered up modestly.
In my opinion a vapor permeability of the material, where several layers of asolid adhesive with a very low water vapor permeability. How will behave such material in a situation where only one layer will be soaked?. So, you put inside the plywood, the innermost layer of veneer that is not protected by a vapor barrier, it will be moist much faster than thelayers located behind a layer of glue. I think a plywood would lead.
In such circumstances, I think the OSB is preferable. It behaves as a homogeneous material.

[buldozer]

I'll tell of course a nonsense, but do we have in Russia tornadoes and twisters?. Hmmm?. But ther are heavy frosts - 40 pozhalsta and regularly. But we continue building a meter-thick brick walls for decades, and then plastering with a 50 mm foam-insulation and heating for fabulous sums of money in a month.

[bill]

1 Wasps live happily in the foam, is this an indicator of its environmental performance, or a promiscuity of wasps?.
2. Do you trust the certificates that are shown to you by the sellers?. Do you know which party are these certificates from, and where did they take them?. I trust the European and the American industry (with some reservations), but I do not trust sellers.
3. The indicators of water vapor permeability should not been looked in scientific articles. The scientists are different, and in the test reports provided by the manufacturer for a certification.

[Summer]

I have read here about the fur of animals, and suddenly I have thought: But where the animals have a fur there are no sweat glands. The sweat glands are only on the soles, ears and other bald areas. It turns out that nature has taken care of a "vapor barrier" of fur?.
About a damp-proofing – the fur of many animal are sweared with a fat, making it moisture-repelling.

[buldozer]

With a perforation of OSB such a question torments me. I will try to portray.
I admit that I study physics very bad, but it seems to me that if you have a rare perforating, you can get badly dry areas between the holes.
If, however, often to perforate the received sieve, multiplied by labor costs, there is a question whether it should be?.
Then you can use instead of the CAP something else?.
By the way no one considered the use of thick SML as a front plate under a plaster or a paint?.

[constructor]

1. So, it the foam is eco-friendly or not where the wasps live?.
2. Do you not know what is the cost to produce a rubber stamp?.
3. This does not apply to articles, but to the discoveries. Not every article is a discovery. A banality, that can repeat everyone doesn't become the opening!.
4. The tests are not performed by the manufacturer but independent laboratories. And they are not made according the advice of scientists, but in accordance with the requirements established by the regulations.

[expert]

If we can improve the OSB, we improve an ecowool ventilation, but we can get a serious problem - passing through the holes in the OSB, the moisture will make it "wet" and the OSB manufacturers strongly recommend to protect the ends from a moisture by paining. To drill holes it is nothing, they still need to be painted.
And do not use it and recommend for the outside trimming by the ecowool - unless you don’t trade.

[baltazar]

I am interested in the variant with a SML. The
questions are here.
1)What is the thickness.
2) whether it is a windscreen?.
3) whether there is an accurate data on its vapor transmission.
4) whether it is possible to admit cotton, and for the outside to use a vapor permeable coating or a paint - in short, without any ventilation gaps and facade finishes (siding, blockhouse, etc.)

[buldozer]

No, really, I have fun)).
Well, how many theorists gathered in the subject!:-).
And some people are crying and are not breathing)).
And I repeat it is breathing!!:-).
A theorist said it must be a single air exchange per hour ..
According to building codes and norms .. And I've seen it, I feel comfortable). I declare once more – the frame hosu (breathable) with an area of 50 meters make a peacefully living WITHOUT ANY ventilation for two men)). Constantly, a year round)). There is no experience in summer)).
I have already painted (inside) – a wall paneling, wallpapers, an ecowool - 15 cm, YUTAVEK (a hydro-windshield, it is a membrane), a blockhouse.
Why do the builders tell me – it should not be, when I say – YES there is!.
Yes, I have put the experiment on myself (thanks to Paul, St. Petersburg, his arguments were great two years ago), so I took a chance. But I have a great feeling in this frame house.
For the critics - about the "feeling". I can define the aura of the house, its comfort, its usefulness for life))
This is not an empty talk)).

[bill]

1. So, you agree the wasps are not the criterion of sustainability!.
2. You agree that you were engaged in fraud!.
3. I am the author of a number of standards - although they are old, but some of them are up to date (though they are not for the construction of frame houses).
4. We are not talking about the wool, but about the edge of the OSB in the hole. Did you check it that so peremptorily to declare?

[constructor]

This is according to your unique method: to drink a half of liter and whether you feel good then?.
I do believe. Many people have unique abilities after 0.5.
P.S. A person can not determine the high content of CO2 in the air. Only according to the secondary criteria, and only if there is a large excess.

[Summer]

I can make a similar declaration, about not "breathing" frame house with a waterproofing vapor ventilation only through a closed fireplace, only the house and a lot of residents. And you live and sleep very well. Well, we measure an aura?.
But I would like to acknowledge if the companies offered houses from a cellulose wadding, I would have made a choice in favor of it, rather than a basalt.

[expert]

That's right, the absence of vapor barrier decides the matter. A wood and a cellulose is a good combination for a comfortable microclimate in the house.