Hi all,
Been lurking here as a guest for a while since I started having issues and gaining knowledge slowly about my case, so here goes:
I had an ignorant renderer slap about 6 metric tonnes of sand & cement render (w/ hydrated lime added) throughout my 1880s, brick & lime mortar home (interiors only). I didn't know there was such a thing as lime render and just spoke to the wrong people, as it turned out. Here in Australia, it's rare to find a renderer who understands breathability, movement etc. It's just, "you want sand n cement or acrylic mate?"
It has adhered spectacularly well, but there are big patches that are not drying out super well. Note: this is a terrace house and the below photo is an attached wall to a neighbouring dwelling.
Moisture meter showing up to 21% in places. Removing this render now will likely cause significant damage to the bricks underneath.
What's the best way to go from here?
The most educated advice I have received is the below:
1. Used the wrong lime in hydrated lime - should've used putty lime.
2. The sand & cement render will breathe, although it won't breathe well. With no water entering the walls, it should eventually dry out.
3. I can white set over the top of this as white set is breathable.
4. I should not paint the white set but instead use a lime wash that breathes.
How good does this advice sound in your opinion? Would you add anything? Dismiss anything?
Is there a way to fix this effectively?
Here's a pic underneath of the worst section (Note: this is an attached wall to another dwelling that has also cement render on the other side). Rendered 6 months ago and roof has been on for 1.5 months. Thanks in advance for your help on this!
Max
Been lurking here as a guest for a while since I started having issues and gaining knowledge slowly about my case, so here goes:
I had an ignorant renderer slap about 6 metric tonnes of sand & cement render (w/ hydrated lime added) throughout my 1880s, brick & lime mortar home (interiors only). I didn't know there was such a thing as lime render and just spoke to the wrong people, as it turned out. Here in Australia, it's rare to find a renderer who understands breathability, movement etc. It's just, "you want sand n cement or acrylic mate?"
It has adhered spectacularly well, but there are big patches that are not drying out super well. Note: this is a terrace house and the below photo is an attached wall to a neighbouring dwelling.
Moisture meter showing up to 21% in places. Removing this render now will likely cause significant damage to the bricks underneath.
What's the best way to go from here?
The most educated advice I have received is the below:
1. Used the wrong lime in hydrated lime - should've used putty lime.
2. The sand & cement render will breathe, although it won't breathe well. With no water entering the walls, it should eventually dry out.
3. I can white set over the top of this as white set is breathable.
4. I should not paint the white set but instead use a lime wash that breathes.
How good does this advice sound in your opinion? Would you add anything? Dismiss anything?
Is there a way to fix this effectively?
Here's a pic underneath of the worst section (Note: this is an attached wall to another dwelling that has also cement render on the other side). Rendered 6 months ago and roof has been on for 1.5 months. Thanks in advance for your help on this!
Max
