Can you take a picture of the brickwork in the cellar directly underneath the fireplace?
can you see the chimney breast in the cellar, and does it seem dry?
If you draw a pencil line round the wet patch, and pencil the date on it, you wil be able to see if/how fast it is drying out.
The metal bead (unless you use stainless, which is better) is galvanised, so in the absence of salt it should not go rusty that fast, especially indoors.
Incidentally, when you are lucky enough to have a cellar, you can often cut a ventilation hole into the flue from there, so it does not show in the room, and helps ventilate the cellar too.
Can you take a picture of the brickwork in the cellar directly underneath the fireplace?
Good luck with details and hope to get up date soon
This post is essentially a Damp issue and would be better answered in the Building Forum. But, for the record:
As regards the render issue:
is it, indeed, render and a remedial skim?
Render is floated on and left a min. 24 hrs, and then skimmed - it's not a morning's work.
Plastic angle bead is often used for remedial work.
If the OP wishes to continue, then there are quite a few further Q's that he might be interested in answering?
the two layers (and the injection) can be seen here.
In terms of spec that I got, the one I gave in my previous post was it. i.e. :
1. Remove plaster from the lower part of chimney breast
2. Inject DPC
3. Replace plaster with waterproofing formula.
Incidentally I had two quotes and, spec wise, that is pretty much what they both said. I assumed that was normal.
Additive used? - no clue, will ask when he gets back to me.
P.S. He just called me: The additive was "a salt nutraliser", he can't remember what it is called. He also says that the salt line is just what happens when new and old plasters meet, the rust is nothing and will wipe away when the thing dries, and that the job will dry happily in the next few days.
The materials used were a cement waterproofing additive to coat facing brick and seal all penetrating damp, from there we have applied a waterproofing flexible plastering agent, finished with a skim,
other products used
Damp cure
Pva
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