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PostPosted: Wed Jul 12, 2017 1:04 am 
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I'm currently renovating my house and have noticed that there is nothing in between the joists under the floorboards on my 1st floor bedrooms.

The depth of the joists is 200mm and the gap between them is 410mm.

So I have decided to get some rolls of 570mm wide Thermafleece CosyWool. Should I get 100mm thick or 150mm thick?

I also want to get some acoustic isolation strip to put on top of the joists and between them and the engineered oak flooring that will go on top. Any particular brand recommended?


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PostPosted: Wed Jul 12, 2017 8:15 am 
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Your bedrooms are currently benefiting from any heat rising from the ground floor, if you insulate the floor you will stop that from happening.

The best place for insulation is at roof level.

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PostPosted: Wed Jul 12, 2017 8:39 am 
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I agree with ajay. Your bedrooms currently benefit from heat transfer from ground to first floor.

But I do recollect a project we worked on many years back when a large historic building was converted into flats.
One issue was to deaden noise between flats on different stories.
Existing timber floors were covered with two thicknesses of 12.5mm plasterboard, overlaid with a floating floor of 18mm T & G chipboard.
In our case new stud walls were constructed with new doorways.
In your case if it was just one bedroom, the doorway height could be altered.

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PostPosted: Thu Jul 13, 2017 12:55 am 
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Thanks guys. To be honest heat retention is not my primary aim. Noise reduction is.

I plan to insulate both the first floor and the roof. I'm starting with my room since I am also changing the floorboards at the same time. I am also looking to keep things as simple as possible. Would the use of CosyWool and Acoustic insulation strips make some difference in terms of noise insulation?


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PostPosted: Sun Jul 16, 2017 11:59 pm 
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Anyone has any advice please?


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