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Default Doubled up 9.5mm PB vs 12.5mm PB

This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a bonus.

Just wondered if there were any major downsides?
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Default Doubled up 9.5mm PB vs 12.5mm PB

On 7/18/2016 1:22 PM, Tim Watts wrote:
This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a bonus.

Just wondered if there were any major downsides?


Can't see any apart from time and cost. Another upside should be
improved sound resistance.
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Default Doubled up 9.5mm PB vs 12.5mm PB

On Mon, 18 Jul 2016 13:22:07 +0100, Tim Watts wrote:

This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a
bonus.

Just wondered if there were any major downsides?


Extra thickness seems to be an upside both for fire proofing and sound
proofing.

The lighter boards should be easier to handle.

Cost of the extra screws?

Nope - can't immediately see the downside.

Cheers


Dave R



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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/2016 13:22, Tim Watts wrote:
This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a bonus.

Just wondered if there were any major downsides?


GripIts only work on 9.5-15 mm plasterboard? I know that's almost
certainly not major but if you were planning to use dozens of them and
only found out later ...


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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/2016 13:22, Tim Watts wrote:
This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a bonus.

Just wondered if there were any major downsides?


I thought everything was done in 12.5 these days?
More rigidity in the ceiling and greater fire resistance?

The builders in ours at the moment are certainly using 12.5 on the ceilings.

Cheers - Pete


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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/16 14:51, Robin wrote:
On 18/07/2016 13:22, Tim Watts wrote:
This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a bonus.

Just wondered if there were any major downsides?


GripIts only work on 9.5-15 mm plasterboard? I know that's almost
certainly not major but if you were planning to use dozens of them and
only found out later ...


That's a valid point...

Do you mean the new type:

http://uk.rs-online.com/web/p/products/8697826/

Because the old (collarless) type should not be a problem as they'd just
push back a little further.


As everything's on 3x2" battens at 450mm centres, the aim is to be able
to fix through to the wood - but there may be exceptions.

I'll have to have a think about that...
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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/16 14:42, David wrote:
On Mon, 18 Jul 2016 13:22:07 +0100, Tim Watts wrote:

This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a
bonus.

Just wondered if there were any major downsides?


Extra thickness seems to be an upside both for fire proofing and sound
proofing.




The lighter boards should be easier to handle.


That they are...


Cost of the extra screws?


I have just tried a small area for mounting lighting junction boxes on
the the attic - what I did was fix 1st sheet with 2 screws then fix
right through both sheets with 50mm drywall screws - so longer screws
but not really any extra needed (well a couple).

Nope - can't immediately see the downside.




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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/16 14:52, www.GymRatZ.co.uk wrote:
On 18/07/2016 13:22, Tim Watts wrote:
This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a bonus.

Just wondered if there were any major downsides?


I thought everything was done in 12.5 these days?
More rigidity in the ceiling and greater fire resistance?

The builders in ours at the moment are certainly using 12.5 on the ceilings.


Possibly the reverse of what I'm doing - standard sheet thickness all
through which makes sense for them.

This is lining the underside of the roof, so fire proofing is not an
issue (not separating rooms). I really wanted to keep the weight down as
well over the roof area (there's a *lot* of m2, adds up).

My walls however are very few m2 (dormer, with windows) so the extra
weight of 2x9.5 is not going to be very noticeable.

Cheers - Pete


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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/2016 14:59, Tim Watts wrote:

Do you mean the new type:

http://uk.rs-online.com/web/p/products/8697826/


They look like the ones I have. But I see that site includes:

"GripIt Fixings have been designed for use with all types of
plasterboard installation:
....
Double-thickness plasterboard"
...."


And then goes on with:

"Features & Benefits:
Fits 9.5-15 mm plasterboard"

That leaves me with bugger all idea if they mean they work on thickness
up to 15mm or up 30mm.

Sorry!

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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/16 15:15, Robin wrote:
On 18/07/2016 14:59, Tim Watts wrote:

Do you mean the new type:

http://uk.rs-online.com/web/p/products/8697826/


They look like the ones I have. But I see that site includes:

"GripIt Fixings have been designed for use with all types of
plasterboard installation:
....
Double-thickness plasterboard"
...."


And then goes on with:

"Features & Benefits:
Fits 9.5-15 mm plasterboard"

That leaves me with bugger all idea if they mean they work on thickness
up to 15mm or up 30mm.

Sorry!


Well, the original type will - just tap them in a bit further.

But I have not seen the new type in the flesh!

It's possible it might not be quite as strong as most of the GripIt will
be handing on one of the 2 skins.

Not sure if that will make a lot of difference!



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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/2016 13:22, Tim Watts wrote:

This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?


Not really... mostly advantages. Costs a bit more, and some cavity wall
fixings may have a harder job, but there are plenty that will still work.

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a bonus.


Its standard practice for shop fitters I understand (although they tend
to do 2 x 12mm). Give a more rigid wall and better sound isolation.

Just wondered if there were any major downsides?



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/
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Default Doubled up 9.5mm PB vs 12.5mm PB

On 18/07/16 23:33, John Rumm wrote:
On 18/07/2016 13:22, Tim Watts wrote:

This is plasterboard ---

Is there any downside to using 2 sheets of 9.5mm on studwork walls (will
be skimmed) vs 1 sheet of 12.5mm?


Not really... mostly advantages. Costs a bit more, and some cavity wall
fixings may have a harder job, but there are plenty that will still work.

I have relatively little wall to cover compared to ceilings and it would
simplify ordering and storing to work with one type.

And I could overlap all joints in the 1st sheet which seems like a bonus.


Its standard practice for shop fitters I understand (although they tend
to do 2 x 12mm). Give a more rigid wall and better sound isolation.

Just wondered if there were any major downsides?




Cheers John - going with this plan then
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