For instant result use liquid pool chlorine at 10 dilution with water applied with sprayer late in the day and then in summer months follow up with moss mould killer as mentioned above and this will keep them good for up to a year.
Cleaning terracotta tiles outdoor.
The most important part is the acid cleaning solution.
This cleaner cannot be used with quartz marble wood or any polished stone tiles.
Do not use a metal mop head which could potentially scratch and harm the terracotta tiles.
Do not waterblast you will damage both grout and tile.
Vinegar is a natural cleanser that is very effective for removing grease dirt and accumulated grime.
Combine a non ionic detergent designed for cleaning terra cotta with warm water according to the detergent manufacturer s instructions.
A mix of vinegar and warm water is excellent for cleaning exterior terracotta tiles.
Doing this on a regular basis may help keep the tiles clean on the surface and mopping to a minimum.
In these cases we recommend cleaning terracotta outside with deterdek or filaphzero the fila concentrated descaling products ideal for terracotta fair faced brick and quarry tiles both effective against salt blooming due to too much humidity.
For more intense cleaning of organic build up dilute 1 5 and clean as described.
These outdoor terracotta tiles had actually been sealed previously with the correct type of sealer but 6 months ago the homeowner had another tile contractor come in and clean seal with the.
Scrub heavy dirt off the tiles with this solution then rinse.
Use a soft rope mop or soft sponge head mop with warm water to clean when the floor starts to look dull or grimy.
You can also try mild soap detergent and water.
Read here how to use deterdek to remove efflorescence and laying residues 2.
The vinegar will work as both a cleaning and disinfecting agent while this diluted solution will be safe for the outdoor tile.
The best way to clean terracotta and or saltillo tiles is on your hands and knees using brass tipped bristles and green scrubber steel will scratch and damage.
To remove ingrained stains from outdoor porcelain tiles pour undiluted onto the stain and the whole tile leave until totally dry then wash and rinse.