Hi all,

I bought a house last December where there is plasterboard internally on
the external walls. (the internal walls have plastering on them).

The house was built 25 years ago and whoever fitted the plasterboards
did not fix the edges very well or put in scrim tape. There is cracks in
the skim where the plasterboard sheet edges meet up.

This means that when you place your hand on either side of the skin
crack lines, the plasterboard can be made to flex a bit.

I got talking to a surveyor and he has suggested that rather than take
all the plasterboard off and installing new plasterboard, fitting scrim
tape and re-skimming, I should drill a series of holes along the crack
line, inject expanding foam and then fill the holes and the crackline in
with polyfiller. He claims that this will stabilise the two plasterboard
sheets and prevent reappearance of the crack lines.

What do the panel think?

Stephen.

In message , Stephen H
writes
Hi all,
I got talking to a surveyor and he has suggested that rather than take
all the plasterboard off and installing new plasterboard, fitting scrim
tape and re-skimming, I should drill a series of holes along the crack
line, inject expanding foam and then fill the holes and the crackline
in with polyfiller. He claims that this will stabilise the two
plasterboard sheets and prevent reappearance of the crack lines.

What do the panel think?

Stephen.

I'm sure that others will come along who have had experience of this,
but my thoughts would be to find a low expansion foam and don't use too
much of it. There have been a few horror stories of expanding foam
continuing to expand and causing damage, It could be embarrassing if it
pushed your board off the wall. I recall a photo of a canoe something
along the lines of they used it to fill a buoyancy void and it split it
apart.

If no one says it is a really stupid idea though, I will put it on my
list of useful work around's.

--
Bill

In message , Bill
wrote

I recall a photo of a canoe something along the lines of they used it
to fill a buoyancy void and it split it apart.

http://www.diyfaq.org.uk/humour.html#foam
--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk

"Alan" wrote in message
...
In message , Bill
wrote

I recall a photo of a canoe something along the lines of they used it to
fill a buoyancy void and it split it apart.

http://www.diyfaq.org.uk/humour.html#foam

Brilliant, just brilliant

On Mon, 16 Apr 2012 01:07:45 +0100, brass monkey wrote:


"Alan" wrote in message
...
In message , Bill
wrote

I recall a photo of a canoe something along the lines of they used it
to
fill a buoyancy void and it split it apart.

http://www.diyfaq.org.uk/humour.html#foam

Brilliant, just brilliant

ahh the old ones are always the best (until they go senile)

Jim K

On 16/04/2012 08:05, Jim K wrote:
On Mon, 16 Apr 2012 01:07:45 +0100, brass monkey wrote:


"Alan" wrote in message
...
In message , Bill
wrote

I recall a photo of a canoe something along the lines of they used
it to
fill a buoyancy void and it split it apart.

http://www.diyfaq.org.uk/humour.html#foam

Brilliant, just brilliant

ahh the old ones are always the best (until they go senile)

Jim K

I recall a class mate (he may have been doing A-Level CDT I think)
making a sit-on canoe at school - probably around 1994-1996 time. He'd
stuck blocks of celotex (or similar) foam together, carved it into a
canoe shape, with a recess on top to sit in. His plan was to use 2-part
expanding foam to cast a precise moulding of his backside. I can't
recall whether he'd coated it in fibreglass at this point.

To get the moulding, I recall him using something like a bin liner or
black sheeting to sit on, and then got someone to pour in this 2-part
mix under the sheet into the recess.

I recall the tears welling up in his eyes, and his moans as he then
realised that the chemical reaction was very exothermic.

D

On 16/04/12 00:02, Bill wrote:
In message , Stephen H
writes
Hi all,
I got talking to a surveyor and he has suggested that rather than take
all the plasterboard off and installing new plasterboard, fitting
scrim tape and re-skimming, I should drill a series of holes along the
crack line, inject expanding foam and then fill the holes and the
crackline in with polyfiller. He claims that this will stabilise the
two plasterboard sheets and prevent reappearance of the crack lines.

What do the panel think?

Stephen.

I'm sure that others will come along who have had experience of this,
but my thoughts would be to find a low expansion foam and don't use too
much of it. There have been a few horror stories of expanding foam
continuing to expand and causing damage, It could be embarrassing if it
pushed your board off the wall. I recall a photo of a canoe something
along the lines of they used it to fill a buoyancy void and it split it
apart.

If no one says it is a really stupid idea though, I will put it on my
list of useful work around's.

http://www.everbuild.co.uk/products/...IP%20DRY%20FIX
pink dryfix and gun,
it does expand a bit, so use a little of it or it'll push the boards out,
the yellow foam expands much too much.

I use it for all sorts of bodge jobs!

http://www.google.com/url?sa=t&rct=j...bnsDY-RST4YT4w



[g]

On 15/04/2012 23:13, Stephen H wrote:
Hi all,

I bought a house last December where there is plasterboard internally on
the external walls. (the internal walls have plastering on them).

The house was built 25 years ago and whoever fitted the plasterboards
did not fix the edges very well or put in scrim tape. There is cracks in
the skim where the plasterboard sheet edges meet up.

This means that when you place your hand on either side of the skin
crack lines, the plasterboard can be made to flex a bit.

I got talking to a surveyor and he has suggested that rather than take
all the plasterboard off and installing new plasterboard, fitting scrim
tape and re-skimming, I should drill a series of holes along the crack
line, inject expanding foam and then fill the holes and the crackline in
with polyfiller. He claims that this will stabilise the two plasterboard
sheets and prevent reappearance of the crack lines.

What do the panel think?

Stephen.

I recently injected about 10 cans of expanding foam through plasterboard
into a flimsy partitiion wall to make it more sturdy, and stop the
microbore pipes inside it rattling around. It seems to have worked.

I used standard expanding foam, but I only injected one can at a time,
and waited at least an hour for each injection to stop expanding before
the next injection. IIRC, a 750ml can of Screwfix No-Nonsense foam will
expand to about 35 litres before setting.

On Apr 16, 4:46*am, RustyCrampon wrote:
On 15/04/2012 23:13, Stephen H wrote:





Hi all,

I bought a house last December where there is plasterboard internally on
the external walls. (the internal walls have plastering on them).

The house was built 25 years ago and whoever fitted the plasterboards
did not fix the edges very well or put in scrim tape. There is cracks in
the skim where the plasterboard sheet edges meet up.

This means that when you place your hand on either side of the skin
crack lines, the plasterboard can be made to flex a bit.

I got talking to a surveyor and he has suggested that rather than take
all the plasterboard off and installing new plasterboard, fitting scrim
tape and re-skimming, I should drill a series of holes along the crack
line, inject expanding foam and then fill the holes and the crackline in
with polyfiller. He claims that this will stabilise the two plasterboard
sheets and prevent reappearance of the crack lines.

What do the panel think?

Stephen.

I recently injected about 10 cans of expanding foam through plasterboard
into a flimsy partitiion wall to make it more sturdy, and stop the
microbore pipes inside it rattling around. It seems to have worked.

I used standard expanding foam, but I only injected one can at a time,
and waited at least an hour for each injection to stop expanding before
the next injection. IIRC, a 750ml can of Screwfix No-Nonsense foam will
expand to about 35 litres before setting.- Hide quoted text -

- Show quoted text -

You need to be a bit careful. The aerosol can stuff relies on
atmospheric moisture to make it go off. You can squirt a bit of water
in the holes but not too much.

On Apr 16, 8:04*am, harry wrote:
On Apr 16, 4:46*am, RustyCrampon wrote:





On 15/04/2012 23:13, Stephen H wrote:

Hi all,

I bought a house last December where there is plasterboard internally on
the external walls. (the internal walls have plastering on them).

The house was built 25 years ago and whoever fitted the plasterboards
did not fix the edges very well or put in scrim tape. There is cracks in
the skim where the plasterboard sheet edges meet up.

This means that when you place your hand on either side of the skin
crack lines, the plasterboard can be made to flex a bit.

I got talking to a surveyor and he has suggested that rather than take
all the plasterboard off and installing new plasterboard, fitting scrim
tape and re-skimming, I should drill a series of holes along the crack
line, inject expanding foam and then fill the holes and the crackline in
with polyfiller. He claims that this will stabilise the two plasterboard
sheets and prevent reappearance of the crack lines.

What do the panel think?

Stephen.

I recently injected about 10 cans of expanding foam through plasterboard
into a flimsy partitiion wall to make it more sturdy, and stop the
microbore pipes inside it rattling around. It seems to have worked.

I used standard expanding foam, but I only injected one can at a time,
and waited at least an hour for each injection to stop expanding before
the next injection. IIRC, a 750ml can of Screwfix No-Nonsense foam will
expand to about 35 litres before setting.- Hide quoted text -

- Show quoted text -

You need to be a bit careful. The aerosol can stuff relies on
atmospheric moisture to make it go off. *You can squirt a bit of water
in the holes but not too much.- Hide quoted text -

- Show quoted text -

Indeed. Large volumes of foam squirted at once tend to result in
horribly sticky voids within, that don't go off.

Cheers
Richard

On 15/04/2012 23:13, Stephen H wrote:
Hi all,

I bought a house last December where there is plasterboard internally on
the external walls. (the internal walls have plastering on them).

The house was built 25 years ago and whoever fitted the plasterboards
did not fix the edges very well or put in scrim tape. There is cracks in
the skim where the plasterboard sheet edges meet up.

This means that when you place your hand on either side of the skin
crack lines, the plasterboard can be made to flex a bit.

I got talking to a surveyor and he has suggested that rather than take
all the plasterboard off and installing new plasterboard, fitting scrim
tape and re-skimming, I should drill a series of holes along the crack
line, inject expanding foam and then fill the holes and the crackline in
with polyfiller. He claims that this will stabilise the two plasterboard
sheets and prevent reappearance of the crack lines.

What do the panel think?

I think it could or would work brilliantly, but only if you got exactly
the right amount of foam in there - would be hard to estimate how much
you need and there would be a high probability of ending up with bulging
walls instead.

If you go ahead, keep the injected amounts really small and give it
plenty of time to cure; eg maybe drill a series of holes three feet(?)
apart along the cracks, inject those, and then later on repeat the
process with a second set of holes drilled in the gaps between the first
set.

David

"Stephen H" wrote in message
news
Hi all,

I bought a house last December where there is plasterboard internally on
the external walls. (the internal walls have plastering on them).

The house was built 25 years ago and whoever fitted the plasterboards did
not fix the edges very well or put in scrim tape. There is cracks in the
skim where the plasterboard sheet edges meet up.

This means that when you place your hand on either side of the skin crack
lines, the plasterboard can be made to flex a bit.

I got talking to a surveyor and he has suggested that rather than take all
the plasterboard off and installing new plasterboard, fitting scrim tape
and re-skimming, I should drill a series of holes along the crack line,
inject expanding foam and then fill the holes and the crackline in with
polyfiller. He claims that this will stabilise the two plasterboard sheets
and prevent reappearance of the crack lines.

What do the panel think?

Stephen.

This anygood for you ?

http://www.youtube.com/watch?v=J_NnJpaqsYI

Jim G