MoreWellie
Forum Supporter
- Messages
- 1,891
- Location
- Warwickshire, UK
Lots of reading and research so far because I thought we had a damp issue in some internal solid brick walls that were built around 1900
I now think the issue I mostly have is salts (either from rising damp or condensation damp) in the plaster which make the moisture meter show the wall as damp BUT....
Having removed the rotten skirting board and some loose plaster at the base of one wall I can see the slate DPC is higher than it should be relative to the concrete floor and the wall render/plaster was installed down to the floor which means it was bridging the dpc and could potentially have allowed the damp up (depending on whether the render, probably applied in the 80s, is waterproof or not)
Once the render and plaster were off the damp meter showed higher on the bricks below the DPC (but not as high as on the plaster surface) and lower still on the bricks above the DPC (similar to background readings higher up the wall)
In addition, I can see no signs of a DPM around the edge of the concrete floor and the moisture meter shows that as being wet as well (through the lino which itself may be conductive for all I know).
My current plan is to remove the lino, coat the floor and up the wall to the DPC with a product like Drybase liquid applied DPM. In the hope that I can then render and plaster down past the DPM to allow the skirting to be replaced with no risk of bridging and laminate the floor
Does anyone have any experience of this scenario to be able to say if this is the best solution?
I am torn between coating the salts with Zinser cover stain or removing more render plaster to above the salt area which is up to around 300mm and runs all the way around most of the walls in the ground floor
I now think the issue I mostly have is salts (either from rising damp or condensation damp) in the plaster which make the moisture meter show the wall as damp BUT....
Having removed the rotten skirting board and some loose plaster at the base of one wall I can see the slate DPC is higher than it should be relative to the concrete floor and the wall render/plaster was installed down to the floor which means it was bridging the dpc and could potentially have allowed the damp up (depending on whether the render, probably applied in the 80s, is waterproof or not)
Once the render and plaster were off the damp meter showed higher on the bricks below the DPC (but not as high as on the plaster surface) and lower still on the bricks above the DPC (similar to background readings higher up the wall)
In addition, I can see no signs of a DPM around the edge of the concrete floor and the moisture meter shows that as being wet as well (through the lino which itself may be conductive for all I know).
My current plan is to remove the lino, coat the floor and up the wall to the DPC with a product like Drybase liquid applied DPM. In the hope that I can then render and plaster down past the DPM to allow the skirting to be replaced with no risk of bridging and laminate the floor
Does anyone have any experience of this scenario to be able to say if this is the best solution?
I am torn between coating the salts with Zinser cover stain or removing more render plaster to above the salt area which is up to around 300mm and runs all the way around most of the walls in the ground floor
