Hello,
I am in the process of renovating our plastered ceilings. After removing the old glue paint and repairing the cracks, I am now going to apply a thin layer of fine lime plaster.
I have tried to buy fine gravel (0-1) to mix for fine lime plaster, but no gravel terminal I've checked with has such fine gravel. I tried sifting "mortar and plaster gravel" (0-4) with a mesh, but the plaster wasn't as fine anyway.
So instead, I have now bought pre-mixed "Lime mortar fine 0-1" in a bag and it works well. However, the pre-mixed is much more expensive. Does anyone know what type of sand to mix with to get the equivalent mortar? Is it some kind of rock flour that should be used?
I am in the process of renovating our plastered ceilings. After removing the old glue paint and repairing the cracks, I am now going to apply a thin layer of fine lime plaster.
I have tried to buy fine gravel (0-1) to mix for fine lime plaster, but no gravel terminal I've checked with has such fine gravel. I tried sifting "mortar and plaster gravel" (0-4) with a mesh, but the plaster wasn't as fine anyway.
So instead, I have now bought pre-mixed "Lime mortar fine 0-1" in a bag and it works well. However, the pre-mixed is much more expensive. Does anyone know what type of sand to mix with to get the equivalent mortar? Is it some kind of rock flour that should be used?
I would sacrifice a few hundred extra bucks to get pre-mixed fine lime plaster 
.
It still won't be many bags for a ceiling with a maximum of 5 mm plaster?
Plaster sand is a somewhat unusual type of sand, and not all gravel pits have a kind that is suitable for lime plaster (I have been told). In concrete, you can mix anything, but lime plaster is a bit more picky.
It should preferably have sharp edges, and beach sand is not suitable because it contains salt - wash and sieve?
Stone dust is also not suitable because there is no guarantee that it will be pure quartz sand from stone.
I got a load of sand that was not suitable for white painting - many black grains in it that resembled coal in the otherwise light yellow sand. Moreover, it was coarser, and I sieved it through a kitchen sieve with a metal wire mesh. A lot of extra work... but when I needed it, there were no ready-made lime plaster mixes to buy, so it was a last resort
gaia
.It still won't be many bags for a ceiling with a maximum of 5 mm plaster?
Plaster sand is a somewhat unusual type of sand, and not all gravel pits have a kind that is suitable for lime plaster (I have been told). In concrete, you can mix anything, but lime plaster is a bit more picky
.It should preferably have sharp edges, and beach sand is not suitable because it contains salt - wash and sieve?
Stone dust is also not suitable because there is no guarantee that it will be pure quartz sand from stone.
I got a load of sand that was not suitable for white painting - many black grains in it that resembled coal in the otherwise light yellow sand. Moreover, it was coarser, and I sieved it through a kitchen sieve with a metal wire mesh
. A lot of extra work... but when I needed it, there were no ready-made lime plaster mixes to buy, so it was a last resort gaia