I would like to convert my upstairs into a 60m2 attefall apartment and am considering how to meet BBR's requirements for apartment-separating floors. We are addressing the fire requirements with double gypsum and stone wool. But how do you easily meet the sound requirement?
220 mm wood joist floor cc 30/60 today.
220 mm wood joist floor cc 30/60 today.
Are you sure you need to meet new building requirements? There is no bathroom/kitchen currently, so you're applying for a building permit for a new apartment, correct?
There are different ways to solve it. If it's not possible to raise the floor to a total thickness of 400-500 mm on the joists, the alternatives are Sylomer strips and a heavy surface layer of concrete, fiber gypsum, or multiple layers of gypsum. See the following links.
http://www.lip.dk/media/173262/lewis_laxstj_rtpl_t.pdf
https://www.youtube.com/watch?v=gV9XcgYShoQ
http://christianberner.se/$-1/file/tysta-hus-del1-stegljudsisolering-i-trabjalklag-2012.pdf
I would also stiffen up the floor with noggins if the existing joists are to be used.
There are different ways to solve it. If it's not possible to raise the floor to a total thickness of 400-500 mm on the joists, the alternatives are Sylomer strips and a heavy surface layer of concrete, fiber gypsum, or multiple layers of gypsum. See the following links.
http://www.lip.dk/media/173262/lewis_laxstj_rtpl_t.pdf
https://www.youtube.com/watch?v=gV9XcgYShoQ
http://christianberner.se/$-1/file/tysta-hus-del1-stegljudsisolering-i-trabjalklag-2012.pdf
I would also stiffen up the floor with noggins if the existing joists are to be used.
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Thank you so much for your answers. I have a ceiling height of 2.5 on the upper floor today, so the dovetail solution is definitely the most interesting. I need to check the costs and whether the foundation and walls can handle the extra loads.
Edit. The solution with Sylymer might still be more suitable for a DIY enthusiast... should be marginally cheaper as well :/
Edit. The solution with Sylymer might still be more suitable for a DIY enthusiast... should be marginally cheaper as well :/
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Sylomer strips are used regardless of construction to prevent impact noise from traveling to the floor below. For good results, the surface layer needs to be heavy. An alternative is as in the link; chipboard flooring and a few layers of gypsum board. The disadvantage is the construction height. An alternative is to choose fiber gypsum instead, which is heavy in itself, and you then only need one board.
If you are doing the job yourself, it might be easiest with Sylomer strips and then fiber gypsum boards like GIFAfloor from Knaufdano. These weigh between 38-57 kg/sqm depending on thickness.
http://www.knaufdanogips.se/index.p...sentation/skivundergolvsystem/fribarande-golv
If you are doing the job yourself, it might be easiest with Sylomer strips and then fiber gypsum boards like GIFAfloor from Knaufdano. These weigh between 38-57 kg/sqm depending on thickness.
http://www.knaufdanogips.se/index.p...sentation/skivundergolvsystem/fribarande-golv
The construction height is not so limited that I can't add multiple layers of gypsum... but thanks for the tip, if it’s not super expensive it seems to save quite a bit of time.
The stability of the building relies partly on screw-glued floor joists, how do I address that with Sylomer strips that are glued and have a floating floor? Is that something to consider?
The stability of the building relies partly on screw-glued floor joists, how do I address that with Sylomer strips that are glued and have a floating floor? Is that something to consider?
That’s correct. With a floating floor, you lose quite a bit in stiffness compared to a screwed and glued chipboard floor. It's never pleasant with a sagging floor, so a couple of noggins are good. If there are very long spans, more beams may be needed. If you are going to live below and rent out the upper floor, I would reinforce it properly.
http://www.traguiden.se/konstruktion/konstruktiv-utformning/stomme/bjalklag/styvhet--bjalklag/
http://www.traguiden.se/konstruktion/konstruktiv-utformning/stomme/bjalklag/styvhet--bjalklag/
I could add another beam between each to get cc 30. It's not much extra work if I'm going to lay a floating floor anyway. The span is four meters, so two noggings per space?