How to clean moss, algae and lichen from concrete walls and facades.
These areas are very easy to treat with just a few basic steps. Firstly the area should be dry and the cleaning process should be undertaken on a dry day.
PREPARATION - Removal of moss and other growth
The area should be brushed to remove any loose growth and dirt.
TREATMENT - Selection and application of chemicals
There are two options for the actual cleaning of the surfaces:
Spray the area with HIGH POWER SURFACE CLEANER - Batifortwhich should be left on the surface for between 15-20 minutes. After which the area should be washed with either a hosepipe and brush or, ideally, a SMALL pressure washer. The pressure washer not only rinses the product but also removes any growth from the surface. Once dry we recommend following 'option 2' to protect the surface.
If the wall has 'greening' then apply a coat of CONCENTRATED MOSS & ALGAE KILLER - Baticlean CR. Baticlean CR will kill the growth and spores but is then designed to be left upon the surface where it can inhibit re-growth. Please remember that Baticlean CR should only be sprayed on to a DRY surface.
Once the wall is clean and dry you have an immediate option for keeping it both looking good and to prevent the return of growth and even protect the wall from water ingress. Apply a coat of ROOF & WALL SEALER - Hydrosil BS, this is water based and soaks into the surface but still allows it to breath. Given the right conditions HYDROSIL BS will protect against fresh growth for up to 10-years.
If you decide not to seal the area then you can apply a new coat of CONCENTRATED MOSS & ALGAE KILLER - Baticlean CR on a regular basis (annually or bi-annually) or just wait until the first signs of new growth appear and simply brush the surface and apply a new coat.