I'm after doing a few sample panels at home here with traditional sand and cement. 1st mix was 5 sand 1 cem and half lime with 200ml evoplast waterproofer mixed into a 10 litre bucket of water
2nd mix was 4 1/2 sand 1 cem and half lime to 200ml waterproofer mixed into 10 litre bucket of water
Both mixes were lovely and creamy.
I did these samples because I seem to get hailine cracks on sponge finish render but no hairline cracks on "napped render"
So on the panels I did at home I sponged half and napped the other half and guess what......when I throw water onto the panels that I sponge finished it shows hairline cracks but the napped finish is perfect (no hairlines) The hairlines are evident as soon as they recieve water but after 20 or 30 seconds as the water soaks in and dries out again they can't be seen. Why do the hairlines show up on sponged finish more than napped finish. I know it's shrinkage but is this the norm when it comes to sponge finish. Really annoying...
2nd mix was 4 1/2 sand 1 cem and half lime to 200ml waterproofer mixed into 10 litre bucket of water
Both mixes were lovely and creamy.
I did these samples because I seem to get hailine cracks on sponge finish render but no hairline cracks on "napped render"
So on the panels I did at home I sponged half and napped the other half and guess what......when I throw water onto the panels that I sponge finished it shows hairline cracks but the napped finish is perfect (no hairlines) The hairlines are evident as soon as they recieve water but after 20 or 30 seconds as the water soaks in and dries out again they can't be seen. Why do the hairlines show up on sponged finish more than napped finish. I know it's shrinkage but is this the norm when it comes to sponge finish. Really annoying...