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 Post subject: Bouncy Floor and Rewire
PostPosted: Wed Oct 25, 2017 1:37 pm 
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Hi All.

I have moved into a house which has some bouncy floors, and could do with a rewire.

The house is a strange build, basically the floorboards are really thick, over 2 inch, these are supported by 4 joists and a load bearing wall. Obviously this aint great for sound insulation, and the bouncy floors are annoying.

Basically my plan is to put some new joists in between the existing spans, add in some rockwool slabs, then pass through the electrics and pipework then plaster over (not convinced of plastering over as then there will be absolutely no access).

Here is a quick sketch to explain:

Image

So basically... where should I begin?


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PostPosted: Wed Oct 25, 2017 2:23 pm 
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Is it a listed building as this might make a difference to what you are planning to do?

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PostPosted: Wed Oct 25, 2017 3:33 pm 
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Hi Dewaltdisney. Its not a listed building, just and oddly built building!


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PostPosted: Wed Oct 25, 2017 4:42 pm 
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Your plan looks fine to me. Hopefully one of our chippies will pick this thread up as they may have some good pointers.

Good luck

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PostPosted: Wed Oct 25, 2017 5:45 pm 
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from an electrical point of view the cables must be 50 mm above the ceiling height and 50 mm below the floor.

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PostPosted: Wed Oct 25, 2017 9:08 pm 
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dewaltdisney wrote:
Hopefully one of our chippies will pick this thread up as they may have some good pointers.


Difficult to say what might be required to guarantee no more bounce in the floor as I've no idea what 2" floorboards bring to the party.

What size are the existing joists - both depth and span - and is the plan to just use more of the same?

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PostPosted: Wed Oct 25, 2017 10:18 pm 
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I cant see the whole of the existing joists at the moment.. but I would say theyre 4x8. The span is about 4 metres.

I dont want to use the same size, was hoping to put some trimmed joist and hangers and use some smaller "joists". I dont think they'll be acting as joists in the normal sense as they wont be taking any load away from the existing supports.

The bounce is marginal but noticeable, there doesnt appear to be any structural issues either... apparently common issue in the houses around me.

Hope that helps.


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PostPosted: Wed Oct 25, 2017 10:53 pm 
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If you fit the trimmers very close to the ends of the existing joists and infill with 8" X 2"s as close to 400mm centres as is possible I think you'd probably achieve something reasonable. A couple of rows of well fitting noggins will also help.

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PostPosted: Thu Oct 26, 2017 4:52 pm 
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ayjay wrote:
If you fit the trimmers very close to the ends of the existing joists and infill with 8" X 2"s as close to 400mm centres as is possible I think you'd probably achieve something reasonable. A couple of rows of well fitting noggins will also help.


I think I understood that ;)

I will try and get some photos up to show what the current situation is as I think that will make more sense.


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