black cement
- Thread starter ukbertie
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Is it definately slate and not black limestone?
Be aware that black limestone will fade to a mid-dark grey so if you want to keep the dark black colour you will need to seal it.
As for pointing be careful as its very hard to get cement stains off limestone and you can't use acid on it to clean stains off.
If it is slate then there's less to worry about as it won't fade the same way and you can usually use acid safely if there are mortar stains.
Black dye is very ineffective on paving pointing and will fade quickly. You can get resin based mortars which will stay black and are applied as a slurry but they are very expensive relative to sand and cement. probably a 40 quid bag covers about 10-15 sq/m
Be aware that black limestone will fade to a mid-dark grey so if you want to keep the dark black colour you will need to seal it.
As for pointing be careful as its very hard to get cement stains off limestone and you can't use acid on it to clean stains off.
If it is slate then there's less to worry about as it won't fade the same way and you can usually use acid safely if there are mortar stains.
Black dye is very ineffective on paving pointing and will fade quickly. You can get resin based mortars which will stay black and are applied as a slurry but they are very expensive relative to sand and cement. probably a 40 quid bag covers about 10-15 sq/m
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