I'm in the process of furnishing the attic in a very old house. The construction is completely diffusion open today, both downwards and upwards (the attic is currently completely uninsulated). The house has walls of clay stone and wooden beams as well as a crawl space foundation. The moisture conditions in the crawl space are not entirely ideal (will be inspected eventually), so on the ground floor I have only wooden floors without varnish or anything, which works well from a moisture perspective.
Now that I'm about to furnish the attic, I'm thinking of using a "regular" method with mineral wool and a vapor barrier. The attic floor currently consists of a weak wooden floor that needs to be reinforced. I happen to have access to a significant amount of 15 mm form-plywood and am now considering laying form-plywood as reinforcement over the entire attic floor and then placing a simpler thin wooden floor on top, which should work well from a durability perspective.
BUT the question is what happens in terms of moisture? The form-plywood is dense, so the upstairs floor (read: the ceiling of the ground floor) gets a dense layer. Both spaces are intended to be heated and there is no direct insulation in the intermediate floor, just a little sand and lime.
What do you think?
Now that I'm about to furnish the attic, I'm thinking of using a "regular" method with mineral wool and a vapor barrier. The attic floor currently consists of a weak wooden floor that needs to be reinforced. I happen to have access to a significant amount of 15 mm form-plywood and am now considering laying form-plywood as reinforcement over the entire attic floor and then placing a simpler thin wooden floor on top, which should work well from a durability perspective.
BUT the question is what happens in terms of moisture? The form-plywood is dense, so the upstairs floor (read: the ceiling of the ground floor) gets a dense layer. Both spaces are intended to be heated and there is no direct insulation in the intermediate floor, just a little sand and lime.
What do you think?
If you are going to have a staircase to the second floor, the moist air will take that route. I.e., due to the stairwell, you get good ventilation between the floors, provided your house is not huuuge.
Alternatively, it can be a good place for "final storage" of the mother-in-law, if you do not have a suitable cellar vault for sealing up. In that case, a "more airy" floor structure is likely needed since the connection between the floors is only of a temporary nature.
Kind regards: Edgar Allen Poe
Alternatively, it can be a good place for "final storage" of the mother-in-law, if you do not have a suitable cellar vault for sealing up. In that case, a "more airy" floor structure is likely needed since the connection between the floors is only of a temporary nature.
Kind regards: Edgar Allen Poe
Hm, I don't quite understand what you mean by the final storage....?
I have a staircase, but it is a very small "shaft" since the staircase is of the hen-ladder type
. The house is very old and consists of small rooms, meaning there isn't exactly free air exchange on the ground floor. I am worried that humid air rises up into the intermediate floor and then stays just under the plywood before the attic floor...?
I have a staircase, but it is a very small "shaft" since the staircase is of the hen-ladder type
. The house is very old and consists of small rooms, meaning there isn't exactly free air exchange on the ground floor. I am worried that humid air rises up into the intermediate floor and then stays just under the plywood before the attic floor...?Warm air rises the easiest way, i.e., up the stairs to the second floor. Since the floor between levels does not have a cold side, no condensation is formed.
I would have used the boards in good conscience.
If it had been an exterior wall, however, it would have been an exorbitant method.
Kind regards, Staffan
I would have used the boards in good conscience.
If it had been an exterior wall, however, it would have been an exorbitant method.
Kind regards, Staffan
Well. If you plan to place your mother-in-law or similar in the attic, the staircase would only be open temporarily.Ilam said:
With such a solution, without a connection between the floors, an airier construction is preferable.
Kind regards: Staffan