ᐅ Second waterproof membrane applied after the first row of bricks
Created on: 7 Aug 2011 11:39
B
BauLHello,
I am currently building a house with walls made of Ytong. The basement is poured concrete (not a “white tank” waterproof structure), and the interior basement walls are made of Ytong. Under each interior wall, there is a layer of tar paper or a similar material to prevent rising damp. The same applies on the ground floor, where each wall also has such a layer underneath.
Recently, I brought a friend who used to be a site foreman a few years ago to the construction site. He pointed out what he considers to be a defect:
He says that after the first course of blocks, there should be another water barrier layer to prevent water from rising further in case of water damage.
I discussed this with my architect, who said that a second waterproofing layer is not necessary and therefore was not planned.
I told this back to my friend, who got quite upset and insisted that the second layer is absolutely standard and essential.
Unfortunately, since I work in IT, I don't know what is correct. Is this second barrier layer after the first course of blocks really required? Is it a defect that it is missing in my house?
I would really appreciate any advice and information! Thank you!
I am currently building a house with walls made of Ytong. The basement is poured concrete (not a “white tank” waterproof structure), and the interior basement walls are made of Ytong. Under each interior wall, there is a layer of tar paper or a similar material to prevent rising damp. The same applies on the ground floor, where each wall also has such a layer underneath.
Recently, I brought a friend who used to be a site foreman a few years ago to the construction site. He pointed out what he considers to be a defect:
He says that after the first course of blocks, there should be another water barrier layer to prevent water from rising further in case of water damage.
I discussed this with my architect, who said that a second waterproofing layer is not necessary and therefore was not planned.
I told this back to my friend, who got quite upset and insisted that the second layer is absolutely standard and essential.
Unfortunately, since I work in IT, I don't know what is correct. Is this second barrier layer after the first course of blocks really required? Is it a defect that it is missing in my house?
I would really appreciate any advice and information! Thank you!
B
Bauexperte7 Aug 2011 12:45Hello,
Masonry damp-proof courses were previously – if installed at all – placed on the first row of bricks. According to current standards, this is incorrect: the damp-proof course must be installed directly on the concrete slab. Installing a damp-proof course prevents capillary water movement within the building materials, keeping them dry.
Kind regards
BauL schrieb:
Since I’m "only" an IT specialist, I have no idea what is correct here. Is this second damp-proof course layer above the first row of bricks necessary? Is it a defect if it’s missing in my case?
Masonry damp-proof courses were previously – if installed at all – placed on the first row of bricks. According to current standards, this is incorrect: the damp-proof course must be installed directly on the concrete slab. Installing a damp-proof course prevents capillary water movement within the building materials, keeping them dry.
Kind regards
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