It's important to clean outdoor tiles regularly to prevent the build-up of dirt and algae, and permanent staining. Without regular cleaning, tiles can not only become discoloured but also slippery and unsafe.
Whenever cleaning, it's best to start with the mildest method first and if you have no success move on to other options like chemical cleaners. Always do a small test section before using chemicals to ensure that they won’t damage your tiles, especially if you have natural stone tiles.
To clean outdoor tiles, you can follow these steps:
1. Sweep or vacuum the surface. Remove any loose dirt, leaves, or debris from the surface of the tiles using a broom or vacuum cleaner.
2. Apply a cleaning solution. Mix a cleaning solution using a mild detergent and warm water. Apply the solution to the tiles using a mop, and let it sit for a few minutes to loosen dirt and stains before using a stiff-bristled brush to scrub the surface of the tiles. Pay extra attention to any areas with heavy stains or build-up.
3. Pressure-clean the area. Cover delicate surfaces like painted walls and use the pressure cleaner to blast away any remaining dirt and algal build-up on your tiles. Heavily soiled areas should also be pre-cleaned with a product such as 30-Seconds Outdoor Cleaner.
4. Use a stain cleaner. If tiles are discoloured around the grout edges, CLR Calcium Lime Rust Remover can be used to remove stains caused by minerals from the grout and tile that have come up to the surface due to rainfall. Make sure to give the CLR enough time to dissolve the minerals before attempting to clean the area with a stiff bristle brush.
4. Rinse the tiles. Use a hose or pressure washer to rinse the tiles thoroughly, removing all traces of the cleaning solution.
5. Dry the surface. Use a clean towel or mop to remove any excess water from the tiles' surface, preventing water marks and hazing.
6. Use a sealer. Grout and tile sealers are invisible water-repellent coatings that provide a protective layer to your tiles. They help protect against stains, soiling, discolouration and efflorescence. - MitchellMc