Resilient bars fitted correctly??

[BotusBuild]

3 hours ago, Nickfromwales said:

Get a friend or two around and crack on 🙃.

She knows where I am (HINT)

[Nickfromwales]

5 hours ago, SteamyTea said:

If the free end (the side the plasterboard screws to) is rubbing against the wall, then there is unnecessary friction, this needs to be avoided.

So I would take it all down, move the bars a few millimetres, and reattach the plasterboard.

The perimeters are secured by scrim and plaster. Moot point afaic. These don’t (can’t) move. 

[SteamyTea]

Just now, Nickfromwales said:

perimeters are secured by scrim and plaster

Secured to what?

If it is the main structure then yes, moot.

But if connected to the plasterboard, effectively an vibrationally isolated box, within a box, then not moot.

[saveasteading]

It's not perfect because we have to deal with reality. I think the sound tests as published  are all done within panels . i.e.no edges.

When I had room to room tests done in a completed project,  all rooms performed a category below what the spec sheets claimed. The tester said this is always the case. 

You'll be relieved to know it was OK.

 

This is what we are doing.. the same as you but added quilt (to be tidied!).

 

 

 

[Nickfromwales]

57 minutes ago, SteamyTea said:

Secured to what?

The feckin walls!

 

[saveasteading]

As another discussion... on some projects that man would need a helmet and thus have to use a lower step. And be on a 400mm platform not a ladder.

 

Myself? I'd approve of bump caps for boarding, they really work if a board drops.

[SteamyTea]

8 minutes ago, Nickfromwales said:

The feckin walls!

 

I think you are misunderstanding me. 

The sprung mass should not touch the main, load bearing, structures.

 

[Adrock]

3 hours ago, saveasteading said:

It's not perfect because we have to deal with reality. I think the sound tests as published  are all done within panels . i.e.no edges.

When I had room to room tests done in a completed project,  all rooms performed a category below what the spec sheets claimed. The tester said this is always the case. 

You'll be relieved to know it was OK.

 

This is what we are doing.. the same as you but added quilt (to be tidied!).

 

 

 

 

Sorry to hijack the thread, I'll be doing a few MF ceilings in a few weeks. 

 

How effective is the ceiling acoustic insulation?

[saveasteading]

33 minutes ago, Adrock said:

How effective

Could you explain please? Do you want comparisons of materials, or decibel reduction numbers or something else.

 

The simple answer is "very".

[Adrock]

Very is good enough for me. Just need to spend more and get covered in horrible fibres again.

[saveasteading]

What centres are the joists? Looking at different products you might find one that squeezes in neatly.

eg, a 1200 roll cuts into 3 x 400 with a saw before unwrapping.

Most rockwool is less itchy than most fg.

[Russdl]

1 hour ago, saveasteading said:

The simple answer is "very"

+1 to the “very”

 

We have acoustic PB, resilient bars, rockwool and then the upper floor, underlay & carpets. Noise doesn’t really get through that. 

[Nickfromwales]

3 hours ago, Adrock said:

 

Sorry to hijack the thread, I'll be doing a few MF ceilings in a few weeks. 

 

How effective is the ceiling acoustic insulation?

It helps massively. Best to get some up under the FF floorboards, and then run all services below, makes a horrible job soooooo much easier / tolerable.

 

 

[Adrock]

No floorboards, my ground floor is a reinforced concrete slab. Fixing it up high still as effective? I suppose it is the same as walls and the drum effect I've read about.

[Nickfromwales]

11 minutes ago, Adrock said:

No floorboards, my ground floor is a reinforced concrete slab. Fixing it up high still as effective? I suppose it is the same as walls and the drum effect I've read about.

I've had 3 beers, but ????

 

I am referring to the underside of the first floor, eg to prevent nuisance noise / sound from the FF affecting the GF.

 

Do we have some crossed wires here?

[Adrock]

Heh, I probably should have clarified and started my own thread. I was asking because it's my basement and I'm using MF ceiling.

[saveasteading]

8 hours ago, Adrock said:

it's my basement

The same principles apply but you already have the advantage of lots of density. What can you hear at present that you want cut out? Footsteps, voices, thumping bass?

[Adrock]

 

2 hours ago, saveasteading said:

The same principles apply but you already have the advantage of lots of density. What can you hear at present that you want cut out? Footsteps, voices, thumping bass?

 

Nothing at all. It's brilliant from that perspective.

 

It's more about the hollow sound from the plasterboard ceilings within the room.

[saveasteading]

2 minutes ago, Adrock said:

the hollow sound from the plasterboard ceilings within the room.

So do you mean echo within the room rather than noise from above? That wouldn't be a resilient bar solution.

Are you predicting this will be an issue or have you grounds for concern?