During the kitchen renovation of our Victorian property we have revealed a
large area ( about 30-35% ) of an external wall that was dry lined.
There was once a chimney breast there that was removed over 20 years ago.
Before we owned it and I assume the dry lining was a 'make good' following
the removal of the breast.
In this dry lined area the internal brickwork is about 2 inches back from
the surrounding internal plasterwork which is mostly good.
Whilst removing the wall tiles to that dry lined wall area resulting damage
was done to the plasterboard to which the tiles were attached. The
plasterboard was slightly damp through penetrating damp - pointing and roof
verge tiles at roof level soon to be attended to.
Due to this dampness I thought I'd remove all the plasterboard on the dry
lined part of the wall and renew the dry lining with new plasterboard.

Then I read Building regulations regarding insulation to external walls that
are to be re-plastered or part re-plastered.

Do I need to dry line the whole of this wall and install Kingspan etc to the
parts that are currently good.
I have difficulty interpreting the Approved Document for material changes
and have no previous experience of this.

We are on a strictly limited budget and this could be an unexpected expense
we were not aware of or prepared for.

How does a building inspector view this sort of situation.

We will be removing a small load bearing wall during the renovation of the
kitchen so a buildings inspector will need to be involved during that job
and I'm sure he would notice a large area of this external wall that had
been replastered.

What are my options re the dry lined wall. Do I really have to renew and
insulate all.

Thanks in advance for any replies.

ABC123

On Aug 8, 12:29 am, "ABC123" wrote:
During the kitchen renovation of our Victorian property we have revealed a
large area ( about 30-35% ) of an external wall that was dry lined.
[snip]

Do I need to dry line the whole of this wall and install Kingspan etc to the
parts that are currently good.

We are on a strictly limited budget and this could be an unexpected expense
we were not aware of or prepared for.

What are my options re the dry lined wall. Do I really have to renew and
insulate all.

Given that a) you have exposed some of the wall already (and hence
have already suffered the inconvenience); b) the price of energy, and
its likely future trajectory, I would /strongly/ recommend you invest
the extra money in properly dry-lining this bit of wall. (and while
you are doing it, try for at least 100mm of insulation).

http://www.secondsandco.co.uk/page_s...ard/index.html
has what look like reasonable prices on Kingspan. It's easy to do
yourself (so you don't need to pay a builder to do it).

In article ,
Martin Bonner writes:
Given that a) you have exposed some of the wall already (and hence
have already suffered the inconvenience); b) the price of energy, and
its likely future trajectory, I would /strongly/ recommend you invest
the extra money in properly dry-lining this bit of wall. (and while
you are doing it, try for at least 100mm of insulation).

Going from nothing to 25mm will get you a large energy saving.
The extra you get on top by going to 50mm or 100mm will be very
low in comparison, and unless the rest of the room is similarly
well insulated, it will make no difference to the overall heat
loss. (Building regs may still require it though - don't know
off-hand what it says here.)

You might find you can get the kingspan with a plasterboard
face in the right thickness to dot-n-dab to the wall, and
have the face flush enough with the original wall to just
plaster across. I've not used this myself, but there have
been one or two times when I came close to doing so.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On Aug 8, 2:46 pm, (Andrew Gabriel) wrote:
In article ,
Martin Bonner writes:

Given that a) you have exposed some of the wall already (and hence
have already suffered the inconvenience); b) the price of energy, and
its likely future trajectory, I would /strongly/ recommend you invest
the extra money in properly dry-lining this bit of wall. (and while
you are doing it, try for at least 100mm of insulation).

Going from nothing to 25mm will get you a large energy saving.
Yes. 25mm will (I think) halve the energy loss through that wall.

The extra you get on top by going to 50mm or 100mm will be very
low in comparison,

If I'm right about 25mm having the same insulative properties as 13"
brickwork,
25mm will save 50%, 50mm an additional 16%, and 100mm a final 14%

and unless the rest of the room is similarly
well insulated, it will make no difference to the overall heat
loss.
"no" difference is overstating somewhat.

My argument is that the additional cost of 100mm over 25mm is
low(ish), and then you have "done" that wall. It makes it more
worthwhile to put in the underfloor insulation and the insulation on
the other wall and ...

.... but I agree, if you are in a /really/ tight budget, the first 25mm
gives you the most benefit.

(Building regs may still require it though - don't know
off-hand what it says here.)

Me neither (but Building control will probably be happy to explain).