About 25 years ago we had a small utility room built on to our kitchen.
Its only about 1.5m x 1.5m internally and two of the four walls are part
of the existing house, i.e cavity brick/block. The other two walls are
single brick exposed to the elements. All the walls are bare brick
internally. Nothing has been plastered. It has always suffered from some
condensation on the single brick walls but this year we splashed out and
replaced the original single glazed door and window with efficient
sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the single
brick walls. When you take away the window and the door, there is only 3
or 4 square meters of single brickwork. I was considering simply
attaching some insulated plasterboard (link below) to the internal
single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834


Thanks

--
Paul Giverin

On 14/11/2019 19:21, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our kitchen.
Its only about 1.5m x 1.5m internally and two of the four walls are part
of the existing house, i.e cavity brick/block. The other two walls are
single brick exposed to the elements. All the walls are bare brick
internally. Nothing has been plastered. It has always suffered from some
condensation on the single brick walls but this year we splashed out and
replaced the original single glazed door and window with efficient
sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the single
brick walls. When you take away the window and the door, there is only 3
or 4 square meters of single brickwork. I was considering simply
attaching some insulated plasterboard (link below) to the internal
single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834


Thanks

That's what that plasterboard is designed for (I used to work for the
company that made it, back in the '70s.
You'll lose a small amount of space from the room - but it will make the
walls warmer.
Using the tapered-edge board you can achieve a fairly neat / invisible
join between the boards - there's a tape that goes into the taper before
you apply the filler, to prevent cracks later.

On 14/11/2019 21:06, Adrian Brentnall wrote:
On 14/11/2019 19:21, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed door
and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door, there
is only 3 or 4 square meters of single brickwork. I was considering
simply attaching some insulated plasterboard (link below) to the
internal single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834


Thanks

That's what that plasterboard is designed for (I used to work for the
company that made it, back in the '70s.
You'll lose a small amount of space from the room - but it will make the
walls warmer.
Using the tapered-edge board you can achieve a fairly neat / invisible
join between the boards - there's a tape that goes into the taper before
you apply the filler, to prevent cracks later.

Thanks for that. To be honest, I'm not too worried about how good it
looks. Its only a utility room for appliances and currently is painted
brick. I'll probably just be painting the plasterboard in the same
colour as the rest of the room. I was just worried about the grab
adhesive being up to the job.

--
Paul Giverin

Paul Giverin Wrote in message:
On 14/11/2019 21:06, Adrian Brentnall wrote:
On 14/11/2019 19:21, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed door
and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door, there
is only 3 or 4 square meters of single brickwork. I was considering
simply attaching some insulated plasterboard (link below) to the
internal single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834


Thanks

That's what that plasterboard is designed for (I used to work for the
company that made it, back in the '70s.
You'll lose a small amount of space from the room - but it will make the
walls warmer.
Using the tapered-edge board you can achieve a fairly neat / invisible
join between the boards - there's a tape that goes into the taper before
you apply the filler, to prevent cracks later.

Thanks for that. To be honest, I'm not too worried about how good it
looks. Its only a utility room for appliances and currently is painted
brick. I'll probably just be painting the plasterboard in the same
colour as the rest of the room. I was just worried about the grab
adhesive being up to the job.


There's always expanding foam made for fixing plasterboards?
--
Jimk


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

On the internal walls dry-lining as you suggest is not a problem but on the single brick exterior walls you would have to be sure there was no damp penetration from the outside. Tanking is perhaps one solution but I do not know how well various dry-lining adhesives will work with that all I know is that you cannot use mechanical fixings that pierce the tanking. I believe when converting cellars into living space the walls are lined with plasterboard on studding not fixed to the tanked walls, this of course reduces your floor space but does allow for insulation and fitting a vapour barrier.

Richard

On 14/11/2019 19:21, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our kitchen.
Its only about 1.5m x 1.5m internally and two of the four walls are part
of the existing house, i.e cavity brick/block. The other two walls are
single brick exposed to the elements. All the walls are bare brick
internally. Nothing has been plastered. It has always suffered from some
condensation on the single brick walls but this year we splashed out and
replaced the original single glazed door and window with efficient
sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the single
brick walls. When you take away the window and the door, there is only 3
or 4 square meters of single brickwork. I was considering simply
attaching some insulated plasterboard (link below) to the internal
single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834


Thanks

yes. Perfect


--
New Socialism consists essentially in being seen to have your heart in
the right place whilst your head is in the clouds and your hand is in
someone else's pocket.

On 15/11/2019 08:11, Tricky Dicky wrote:
On the internal walls dry-lining as you suggest is not a problem but
on the single brick exterior walls you would have to be sure there
was no damp penetration from the outside.

Wrong. The plasterboard contains a vapour barrier. It is designed for this.



--
New Socialism consists essentially in being seen to have your heart in
the right place whilst your head is in the clouds and your hand is in
someone else's pocket.

On 14/11/2019 19:21, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our kitchen.
Its only about 1.5m x 1.5m internally and two of the four walls are part
of the existing house, i.e cavity brick/block. The other two walls are
single brick exposed to the elements. All the walls are bare brick
internally. Nothing has been plastered. It has always suffered from some
condensation on the single brick walls but this year we splashed out and
replaced the original single glazed door and window with efficient
sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the single
brick walls. When you take away the window and the door, there is only 3
or 4 square meters of single brickwork. I was considering simply
attaching some insulated plasterboard (link below) to the internal
single brickwork using a grab adhesive. Will this plan work?


Ive just finished doing exactly that in one of our rooms. Its a
recognised method for insulating solid walls.

Mike

On 15/11/2019 07:17, Jimk wrote:
Paul Giverin Wrote in message:
On 14/11/2019 21:06, Adrian Brentnall wrote:
On 14/11/2019 19:21, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed door
and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door, there
is only 3 or 4 square meters of single brickwork. I was considering
simply attaching some insulated plasterboard (link below) to the
internal single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834


Thanks

That's what that plasterboard is designed for (I used to work for the
company that made it, back in the '70s.
You'll lose a small amount of space from the room - but it will make the
walls warmer.
Using the tapered-edge board you can achieve a fairly neat / invisible
join between the boards - there's a tape that goes into the taper before
you apply the filler, to prevent cracks later.

Thanks for that. To be honest, I'm not too worried about how good it
looks. Its only a utility room for appliances and currently is painted
brick. I'll probably just be painting the plasterboard in the same
colour as the rest of the room. I was just worried about the grab
adhesive being up to the job.


There's always expanding foam made for fixing plasterboards?


Alternatively, do as I did to the lounge and bedroom walls facing
North. Use 30mm 'celotex' cut to the exact height of the room and
fix to the wall using battens cut down from cls timber. This
gives three battens 30mm thick. Fix these horizontally using
80mm frame anchors, then infill between the battens with more
30mm 'celotex' (I used Quinntherm). Then affix plasterboard to
the battens, scim if needed or use tapered PB with glassfibre
reinforcing.

There are foaming PU adhesives for fixing plasterboard, but you
need to check that it doesn't disolve the extruded polystyrene
on the back of the plasterboard.

On 15/11/2019 14:50, The Natural Philosopher wrote:
On 15/11/2019 08:11, Tricky Dicky wrote:
On the internal walls dry-lining as you suggest is not a problem but
on the single brick exterior walls you would have to be sure there
was no damp penetration from the outside.

Wrong. The plasterboard contains a vapour barrier. It is designed for this.



Only some variants do, intended for upstairs ceilings.

Most PB is not water vapour impermeable.

As long as there is a DPC in the wall, I would seal the
outside with breathable water repellent sealant intended
for this purpose.

Thanks to everyone for their input...... much appreciated.

I'm 99.9% sure that I don't have a problem with damp permeating from
outside. It is all condensation forming on the cold brick walls. I think
I am going to go ahead with using the insulated plasterboard. My only
concern now is getting the best adhesive to bond the PIR foam to the
brickwork. Given that the brickwork isn't dead even, I would like to use
some sort of fill adhesive. Any suggestions for a grab/fill adhesive
that is compatible with the PIR foam backing board?

Thanks.

--
Paul Giverin

On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our kitchen.
Its only about 1.5m x 1.5m internally and two of the four walls are part
of the existing house, i.e cavity brick/block. The other two walls are
single brick exposed to the elements. All the walls are bare brick
internally. Nothing has been plastered. It has always suffered from some
condensation on the single brick walls but this year we splashed out and
replaced the original single glazed door and window with efficient
sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the single
brick walls. When you take away the window and the door, there is only 3
or 4 square meters of single brickwork. I was considering simply
attaching some insulated plasterboard (link below) to the internal
single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834

That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

One concern using grab adhesive is how well it works with a wet wall.

On 2019-11-15 15:54, Andrew wrote:
On 15/11/2019 14:50, The Natural Philosopher wrote:
On 15/11/2019 08:11, Tricky Dicky wrote:
On the internal walls dry-lining as you suggest is not a problem but
on the single brick exterior walls you would have to be sure there
was no damp penetration from the outside.

Wrong. The plasterboard contains a vapour barrier. It is designed for
this.



Only some variants do, intended for upstairs ceilings.

Most PB is not water vapour impermeable.

Plain plasterboard may not be but any decent insulated board does have a
vapour barrier.

On 15/11/2019 15:54, Andrew wrote:
On 15/11/2019 14:50, The Natural Philosopher wrote:
On 15/11/2019 08:11, Tricky Dicky wrote:
On the internal walls dry-lining as you suggest is not a problem but
on the single brick exterior walls you would have to be sure there
was no damp penetration from the outside.

Wrong. The plasterboard contains a vapour barrier. It is designed for
this.



Only some variants do, intended for upstairs ceilings.

Most PB is not water vapour impermeable.
Plasterboad with insulation is as all celotex/kingspan is foiled.

The product he linked to specifically stated it was .
But you didnt bother to foillow te link did you?



As long as there is a DPC in the wall, I would seal the
outside with breathable water repellent sealant intended
for this purpose.

Oh FFS.

Is all your DIY knowledge from manufacturers brochures?





--
Gun Control: The law that ensures that only criminals have guns.

On 15/11/2019 18:23, Fredxx wrote:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed door
and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door, there
is only 3 or 4 square meters of single brickwork. I was considering
simply attaching some insulated plasterboard (link below) to the
internal single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834


That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

Polystyrene is banned except in floor screeds. Extreme fire risk.

One concern using grab adhesive is how well it works with a wet wall.


--
The biggest threat to humanity comes from socialism, which has utterly
diverted our attention away from what really matters to our existential
survival, to indulging in navel gazing and faux moral investigations
into what the world ought to be, whilst we fail utterly to deal with
what it actually is.

On 15/11/2019 21:08:49, The Natural Philosopher wrote:
On 15/11/2019 18:23, Fredxx wrote:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed
door and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door, there
is only 3 or 4 square meters of single brickwork. I was considering
simply attaching some insulated plasterboard (link below) to the
internal single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834



That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

Polystyrene is banned except in floor screeds. Extreme fire risk.

Best tell Travis Perkins:

https://www.travisperkins.co.uk/ther...-30mm/p/752767

And Jewsons

https://www.jewson.co.uk/building-ma...-plasterboard/

And B&Q

https://www.diy.com/departments/gypr.../119541_BQ.prd

One concern using grab adhesive is how well it works with a wet wall.

On 15/11/2019 21:36:44, Fredxx wrote:
On 15/11/2019 21:08:49, The Natural Philosopher wrote:
On 15/11/2019 18:23, Fredxx wrote:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed
door and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door,
there is only 3 or 4 square meters of single brickwork. I was
considering simply attaching some insulated plasterboard (link
below) to the internal single brickwork using a grab adhesive. Will
this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834




That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

Polystyrene is banned except in floor screeds. Extreme fire risk.

Best tell Travis Perkins:

https://www.travisperkins.co.uk/ther...-30mm/p/752767


And Jewsons

https://www.jewson.co.uk/building-ma...-plasterboard/


And B&Q
https://www.diy.com/departments/gypr.../119541_BQ.prd

Unless you put insulated taper edge plasterboard under screeds?

Where do you get your information from?

Andrew Wrote in message:
On 15/11/2019 07:17, Jimk wrote:
Paul Giverin Wrote in message:
On 14/11/2019 21:06, Adrian Brentnall wrote:
On 14/11/2019 19:21, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed door
and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door, there
is only 3 or 4 square meters of single brickwork. I was considering
simply attaching some insulated plasterboard (link below) to the
internal single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834


Thanks

That's what that plasterboard is designed for (I used to work for the
company that made it, back in the '70s.
You'll lose a small amount of space from the room - but it will make the
walls warmer.
Using the tapered-edge board you can achieve a fairly neat / invisible
join between the boards - there's a tape that goes into the taper before
you apply the filler, to prevent cracks later.

Thanks for that. To be honest, I'm not too worried about how good it
looks. Its only a utility room for appliances and currently is painted
brick. I'll probably just be painting the plasterboard in the same
colour as the rest of the room. I was just worried about the grab
adhesive being up to the job.


There's always expanding foam made for fixing plasterboards?


Alternatively, do as I did to the lounge and bedroom walls facing
North. Use 30mm 'celotex' cut to the exact height of the room and
fix to the wall using battens cut down from cls timber. This
gives three battens 30mm thick. Fix these horizontally using
80mm frame anchors, then infill between the battens with more
30mm 'celotex' (I used Quinntherm).


Sounds like a lot of farting about whilst introducing cold bridges
& vapour channels into the previously contiguous insulation
....

Then affix plasterboard to
the battens, scim if needed or use tapered PB with glassfibre
reinforcing.

There are foaming PU adhesives for fixing plasterboard, but you
need to check that it doesn't disolve the extruded polystyrene
on the back of the plasterboard.

Polystyrene?
The ones linked to & the only ones worth bothering with are PIR foam...

--
Jimk


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

Fredxx Wrote in message:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our kitchen.
Its only about 1.5m x 1.5m internally and two of the four walls are part
of the existing house, i.e cavity brick/block. The other two walls are
single brick exposed to the elements. All the walls are bare brick
internally. Nothing has been plastered. It has always suffered from some
condensation on the single brick walls but this year we splashed out and
replaced the original single glazed door and window with efficient
sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the single
brick walls. When you take away the window and the door, there is only 3
or 4 square meters of single brickwork. I was considering simply
attaching some insulated plasterboard (link below) to the internal
single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834

That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

One concern using grab adhesive is how well it works with a wet wall.


MS polymer - Stixall, sika flex (I think), others are available...
--
Jimk


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

On 15/11/2019 21:36, Fredxx wrote:
On 15/11/2019 21:08:49, The Natural Philosopher wrote:
On 15/11/2019 18:23, Fredxx wrote:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed
door and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door,
there is only 3 or 4 square meters of single brickwork. I was
considering simply attaching some insulated plasterboard (link
below) to the internal single brickwork using a grab adhesive. Will
this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834




That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

Polystyrene is banned except in floor screeds. Extreme fire risk.

Best tell Travis Perkins:

https://www.travisperkins.co.uk/ther...-30mm/p/752767


And Jewsons

https://www.jewson.co.uk/building-ma...-plasterboard/


And B&Q

https://www.diy.com/departments/gypr.../119541_BQ.prd



And the residents of Grenfell towers..


BCO wouldn't let me out it in the walls back in 2000.


One concern using grab adhesive is how well it works with a wet wall.




--
"The most difficult subjects can be explained to the most slow witted
man if he has not formed any idea of them already; but the simplest
thing cannot be made clear to the most intelligent man if he is firmly
persuaded that he knows already, without a shadow of doubt, what is laid
before him."

- Leo Tolstoy

On 16/11/2019 06:27:25, The Natural Philosopher wrote:
On 15/11/2019 21:36, Fredxx wrote:
On 15/11/2019 21:08:49, The Natural Philosopher wrote:
On 15/11/2019 18:23, Fredxx wrote:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls
but this year we splashed out and replaced the original single
glazed door and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have
got worse. I was thinking about tanking/insulating the inside of
the single brick walls. When you take away the window and the door,
there is only 3 or 4 square meters of single brickwork. I was
considering simply attaching some insulated plasterboard (link
below) to the internal single brickwork using a grab adhesive. Will
this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834





That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

Polystyrene is banned except in floor screeds. Extreme fire risk.

Best tell Travis Perkins:

https://www.travisperkins.co.uk/ther...-30mm/p/752767


And Jewsons

https://www.jewson.co.uk/building-ma...-plasterboard/


And B&Q

https://www.diy.com/departments/gypr.../119541_BQ.prd



And the residents of Grenfell towers..

That was a type of cladding not recommended by the manufacturer for high
rise buildings but ok for buildings less that 18m in height.

BCO wouldn't let me out it in the walls back in 2000.

Could that have been due to your social skills?

On Friday, 15 November 2019 15:55:01 UTC, Andrew wrote:
On 15/11/2019 14:50, The Natural Philosopher wrote:
On 15/11/2019 08:11, Tricky Dicky wrote:
On the internal walls dry-lining as you suggest is not a problem but
on the single brick exterior walls you would have to be sure there
was no damp penetration from the outside.

Wrong. The plasterboard contains a vapour barrier. It is designed for this.



Only some variants do, intended for upstairs ceilings.

Most PB is not water vapour impermeable.

As long as there is a DPC in the wall, I would seal the
outside with breathable water repellent sealant intended
for this purpose.

Classic mistake. Net flow of water vapour is from interior to exterior, if you block its exit the wall is likely to get damp, very gradually.


NT

On 21/11/2019 02:10, wrote:
On Friday, 15 November 2019 15:55:01 UTC, Andrew wrote:
On 15/11/2019 14:50, The Natural Philosopher wrote:
On 15/11/2019 08:11, Tricky Dicky wrote:
On the internal walls dry-lining as you suggest is not a problem but
on the single brick exterior walls you would have to be sure there
was no damp penetration from the outside.

Wrong. The plasterboard contains a vapour barrier. It is designed for this.



Only some variants do, intended for upstairs ceilings.

Most PB is not water vapour impermeable.

As long as there is a DPC in the wall, I would seal the
outside with breathable water repellent sealant intended
for this purpose.

Classic mistake. Net flow of water vapour is from interior to exterior, if you block its exit the wall is likely to get damp, very gradually.


NT

"breathable water repellent". I chose those words carefully and such
stuff is available.

On 15/11/2019 21:08, The Natural Philosopher wrote:
On 15/11/2019 18:23, Fredxx wrote:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls but
this year we splashed out and replaced the original single glazed
door and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have got
worse. I was thinking about tanking/insulating the inside of the
single brick walls. When you take away the window and the door, there
is only 3 or 4 square meters of single brickwork. I was considering
simply attaching some insulated plasterboard (link below) to the
internal single brickwork using a grab adhesive. Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834



That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

Polystyrene is banned except in floor screeds. Extreme fire risk.

Nonsense.

It is the overall construction that determines fire resistance,
not the type of insulation. Plasterboard, with properly taped
and sealed joints is a very good fire barrier.



One concern using grab adhesive is how well it works with a wet wall.

On 16/11/2019 06:27, The Natural Philosopher wrote:
On 15/11/2019 21:36, Fredxx wrote:
On 15/11/2019 21:08:49, The Natural Philosopher wrote:
On 15/11/2019 18:23, Fredxx wrote:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It has
always suffered from some condensation on the single brick walls
but this year we splashed out and replaced the original single
glazed door and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have
got worse. I was thinking about tanking/insulating the inside of
the single brick walls. When you take away the window and the door,
there is only 3 or 4 square meters of single brickwork. I was
considering simply attaching some insulated plasterboard (link
below) to the internal single brickwork using a grab adhesive. Will
this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834





That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

Polystyrene is banned except in floor screeds. Extreme fire risk.

Best tell Travis Perkins:

https://www.travisperkins.co.uk/ther...-30mm/p/752767


And Jewsons

https://www.jewson.co.uk/building-ma...-plasterboard/


And B&Q

https://www.diy.com/departments/gypr.../119541_BQ.prd



And the residents of Grenfell towers..


Which was insulated with Celotex 'XR', which as I recollect, at the
time, you refused to accept that it contributed to the fire.

BCO wouldn't let me out it in the walls back in 2000.


One concern using grab adhesive is how well it works with a wet wall.

On 21/11/2019 15:53, Andrew wrote:
On 16/11/2019 06:27, The Natural Philosopher wrote:
On 15/11/2019 21:36, Fredxx wrote:
On 15/11/2019 21:08:49, The Natural Philosopher wrote:
On 15/11/2019 18:23, Fredxx wrote:
On 14/11/2019 19:21:46, Paul Giverin wrote:
About 25 years ago we had a small utility room built on to our
kitchen. Its only about 1.5m x 1.5m internally and two of the four
walls are part of the existing house, i.e cavity brick/block. The
other two walls are single brick exposed to the elements. All the
walls are bare brick internally. Nothing has been plastered. It
has always suffered from some condensation on the single brick
walls but this year we splashed out and replaced the original
single glazed door and window with efficient sealed units.

With the onset of colder weather, the condensation seems to have
got worse. I was thinking about tanking/insulating the inside of
the single brick walls. When you take away the window and the
door, there is only 3 or 4 square meters of single brickwork. I
was considering simply attaching some insulated plasterboard (link
below) to the internal single brickwork using a grab adhesive.
Will this plan work?


https://www.travisperkins.co.uk/ther...-38mm/p/383834






That's expensive stuff but I guess easier to apply than battens and
polystyrene infill between battens.

Polystyrene is banned except in floor screeds. Extreme fire risk.

Best tell Travis Perkins:

https://www.travisperkins.co.uk/ther...-30mm/p/752767


And Jewsons

https://www.jewson.co.uk/building-ma...-plasterboard/


And B&Q

https://www.diy.com/departments/gypr.../119541_BQ.prd



And the residents of Grenfell towers..


Which was insulated with Celotex 'XR', which as I recollect, at the
time, you refused to accept that it contributed to the fire.

Actually it was the decorative cladding that was the issue more than the
celotex.


BCO wouldn't let me out it in the walls back in 2000.


One concern using grab adhesive is how well it works with a wet wall.







--
€œA leader is best When people barely know he exists. Of a good leader,
who talks little,When his work is done, his aim fulfilled,They will say,
€œWe did this ourselves.€�

ۥ Lao Tzu, Tao Te Ching

On Thursday, 21 November 2019 15:48:29 UTC, Andrew wrote:
On 21/11/2019 02:10, tabbypurr wrote:
On Friday, 15 November 2019 15:55:01 UTC, Andrew wrote:
On 15/11/2019 14:50, The Natural Philosopher wrote:
On 15/11/2019 08:11, Tricky Dicky wrote:

On the internal walls dry-lining as you suggest is not a problem but
on the single brick exterior walls you would have to be sure there
was no damp penetration from the outside.

Wrong. The plasterboard contains a vapour barrier. It is designed for this.



Only some variants do, intended for upstairs ceilings.

Most PB is not water vapour impermeable.

As long as there is a DPC in the wall, I would seal the
outside with breathable water repellent sealant intended
for this purpose.

Classic mistake. Net flow of water vapour is from interior to exterior, if you block its exit the wall is likely to get damp, very gradually.


NT

"breathable water repellent". I chose those words carefully and such
stuff is available.

You can certainly buy products that describe themselves as that. Since water moves from interior to exterior they are of little use. And they grossly reduce breathability of the exterior surface, promoting damp.


NT