Thanks for your reply adapt. I think there are many people on this site who would disagree though. Lime is not "outdated", and given that my house is made of bricks from the 1800's, I prefer to use materials that are appropriate for them.
Yes, the brickwork was supposedly all sealed with "silicate primer" - is this correct?
It wasn't particularly dry before the repointing. In fact, there was some damp - though much less than now - after the plastering that took a long time to go away.
Yes, the damp is only on the exposed walls...
Is it possible that the gypsum inside is trapping all the moisture, while the lime outside is letting moisture in and out, creating a nasty in-equilibium?
More pics here. There is facia, flush to the brickwork, but it was checked by the guy who did the brickwork and should be in good shape.
Rear_roof_top-shot.jpg Photo by ocouzin | Photobucket
Outside_Chimneys-wall.jpg Photo by ocouzin | Photobucket
Rear_elevation2.jpg Photo by ocouzin |...
Indeed, this seems to make sense. We are running a couple big dehumidifiers non-stop now, and the moisture seems to be reducing, but I was hoping to find a better solution.
Thanks Stuy, for your reply. Actually we were quite ignorant, and the builder didn't even mention the difference or need to consider cement vs. lime. I'm seriously considering just running dehudifiers, as tearing the walls apart again is almost too much to face right now.
Thanks Bubbles65. I can only answer some of your questions, but here goes: The plastering was done first
1. Is it a solid wall? I was told it was a cavity wall, but searching around on the web it seems like 1890 homes were mainly solid2. Is it below ground level or partially below? No, and the...
Yes, you've got it right bubbles65. The outside render was removed, as it was cracking and ugly. The work was done by different people a few months apart, so this was not the "plan" (indeed, there was no plan per se), though neither person mentioned anything about there being an issue.
See if these pics help:
https://i441.photobucket.com/albums/qq138/ocouzin/20140111_Inside-wall.jpg
https://i441.photobucket.com/albums/qq138/ocouzin/th_20140118_outsidewall-Copy.jpg
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