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Repairing a lath & plaster ceiling.
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dpack



Joined: 02 Jul 2005
Posts: 32894
Location: yes
PostPosted: Sun Sep 03, 17 9:01 pm    Post subject:  Reply with quote    

drywall or even sheets of waterproof mdf are very useful in the right places

flexiply can do some very unusual shapes

can you show us a photo of the hole?

from the description dawb on a hawk and a trowel still seems the best option

Hairyloon



Joined: 20 Nov 2008
Posts: 14800
Location: Today I are mostly being in Yorkshire.
PostPosted: Sun Sep 03, 17 9:59 pm    Post subject: Reply with quote    

dpack wrote:
can you show us a photo of the hole?


Alas no: I've trowelled it full of daub now...

dpack



Joined: 02 Jul 2005
Posts: 32894
Location: yes
PostPosted: Mon Sep 04, 17 8:56 am    Post subject: Reply with quote    

if it is daubed out a skim of multi finish should complete the job quickly ,easily and properly for minimal cost

Hairyloon



Joined: 20 Nov 2008
Posts: 14800
Location: Today I are mostly being in Yorkshire.
PostPosted: Mon Sep 04, 17 9:00 am    Post subject: Reply with quote    

dpack wrote:
if it is daubed out a skim of multi finish should complete the job quickly ,easily and properly for minimal cost


That's what I thought, but I forgot to mention that the homeowner is a crazy person...

Also taking off the wallcovering to allow for the daubing exposed a damn great big crack. If it were up to me I'd investigate with a view to filling, but...

dpack



Joined: 02 Jul 2005
Posts: 32894
Location: yes
PostPosted: Mon Sep 04, 17 1:24 pm    Post subject: Reply with quote    


Slim



Joined: 05 Mar 2006
Posts: 4664
Location: New England (In the US of A)
PostPosted: Mon Sep 04, 17 1:33 pm    Post subject: Reply with quote    

Sometimes I feel that the best advice I was ever given was "quit early, and quit often"

(with the caveat that the advice was not being offered as an excuse to give up)

Hairyloon



Joined: 20 Nov 2008
Posts: 14800
Location: Today I are mostly being in Yorkshire.
PostPosted: Mon Sep 04, 17 2:28 pm    Post subject: Reply with quote    

Slim wrote:
Sometimes I feel that the best advice I was ever given was "quit early, and quit often"

(with the caveat that the advice was not being offered as an excuse to give up)


I think perhaps that "quit" is too strong a word: it doesn't suggest any intent to go back to it... Or do I misread it?

Slim



Joined: 05 Mar 2006
Posts: 4664
Location: New England (In the US of A)
PostPosted: Thu Sep 07, 17 11:01 am    Post subject: Reply with quote    

No, that's how I intended it.

But from the perspective of you trying to help someone that is "crazy" and may not want to do things as you suggest would be proper. Can't push a chain.

Hairyloon



Joined: 20 Nov 2008
Posts: 14800
Location: Today I are mostly being in Yorkshire.
PostPosted: Thu Sep 07, 17 12:12 pm    Post subject: Reply with quote    

Slim wrote:
Can't push a chain.


Challenge accepted...

Changing the subject a bit (but still in the bathroom), the question currently under consideration is the value of putting insulation into the end wall: ie a sheet of celotex type board behind the plasterboard.

On the one hand, some insulation is always better than none, but on the other, is there any point doing that little bit and none of the rest of the house?

Slim



Joined: 05 Mar 2006
Posts: 4664
Location: New England (In the US of A)
PostPosted: Thu Sep 07, 17 12:20 pm    Post subject: Reply with quote    

Will the other walls ever be opened up in the future? Piecemeal can be okay for refurbishing....

What is celotex made out of? Will it be okay if moisture makes it in? I would think modern rockwool would be appropriate....

The bathroom exterior walls are where I would expect you'd most likely find humidity condensing within the wall. A bit of insulation may help to reduce that, but I know that these things quickly get tricky balancing a desire for breathability to dry things out and moisture barriers to keep humidity on one side or another.....

Hairyloon



Joined: 20 Nov 2008
Posts: 14800
Location: Today I are mostly being in Yorkshire.
PostPosted: Thu Sep 07, 17 1:38 pm    Post subject: Reply with quote    

Slim wrote:
Will the other walls ever be opened up in the future?

Probably not.
Quote:
What is celotex made out of? Will it be okay if moisture makes it in? I would think modern rockwool would be appropriate....

Polyisocyanurate. As I understand, this is a standard way of doing this kind of thing...
Quote:
I know that these things quickly get tricky balancing a desire for breathability to dry things out and moisture barriers to keep humidity on one side or another.....

I couldn't begin to guess which side would be which. I decided to not worry about it.

dpack



Joined: 02 Jul 2005
Posts: 32894
Location: yes
PostPosted: Thu Sep 07, 17 1:54 pm    Post subject: Reply with quote    

as above re damp issues etc

as shown recently in london the stuff burns and if it does a breifcase sized lump produces enough one lungful toxic gas ( mostly hcn but a few other choice compounds ) to need a noddy suit in a large house

on the outside is potentially dodgy, inside why not use rockwool slab

Hairyloon



Joined: 20 Nov 2008
Posts: 14800
Location: Today I are mostly being in Yorkshire.
PostPosted: Thu Sep 07, 17 3:14 pm    Post subject: Reply with quote    

Still leaves the question of whether to use anything...

dpack



Joined: 02 Jul 2005
Posts: 32894
Location: yes
PostPosted: Thu Sep 07, 17 11:09 pm    Post subject: Reply with quote    

improving ventilation is my best advice for condensation damp

re insulating a cold wall where water vapour condenses a simple skin of suitable boards over rockwool slabs or mineral panels with suitably sized battens will make the inner surface a lot warmer and less prone to "dew "

it does make the room a bit smaller which can be an issue especially if you have to move the bathroom suite in a bit

Hairyloon



Joined: 20 Nov 2008
Posts: 14800
Location: Today I are mostly being in Yorkshire.
PostPosted: Thu Sep 07, 17 11:28 pm    Post subject: Reply with quote    

dpack wrote:
improving ventilation is my best advice for condensation damp

That wasn't actually the problem that we seek to address.

Quote:
it does make the room a bit smaller which can be an issue especially if you have to move the bathroom suite in a bit

The suite is coming out anyway and the room is big enough that it can spare a few inches off the end.

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