This is my first post on here. I've used this forum extensively for about 3-4 years, invaluable!
However, I'm now in the middle of my own self build, and Im just after some clarification on the ratios for the external rendering. We've had some extension work done, this has been scratched 4-1 + render additive. Top coat was 5-1-1 Sand OPC Lime + Waterproofer, before finishing using a sponge float.
A few of you on here have specified 5-1 scratch and 6-1-1, though isn't this a little soft? (I've been using 6-1 to repair internally, old floated walls). And since I'm sponge floating, is it too weak / soft for this finish outside? Finish will be painted. Rest of house is red brick, and I'm looking to scud it in SBR / OPC 2-1 prior to scratching. Any pointers would be much appreciated, I have done a little search, but would just like some clarity before continuing. Sorry for the long winded post, I think that's everything. Thanks guys!
However, I'm now in the middle of my own self build, and Im just after some clarification on the ratios for the external rendering. We've had some extension work done, this has been scratched 4-1 + render additive. Top coat was 5-1-1 Sand OPC Lime + Waterproofer, before finishing using a sponge float.
A few of you on here have specified 5-1 scratch and 6-1-1, though isn't this a little soft? (I've been using 6-1 to repair internally, old floated walls). And since I'm sponge floating, is it too weak / soft for this finish outside? Finish will be painted. Rest of house is red brick, and I'm looking to scud it in SBR / OPC 2-1 prior to scratching. Any pointers would be much appreciated, I have done a little search, but would just like some clarity before continuing. Sorry for the long winded post, I think that's everything. Thanks guys!
