We were asked to clean and remove algae from Maricourt Catholic High School in Maghull, Merseyside, United Kingdom.
Formerly Mater Misericordiae Grammar School, it is one of two secondary schools administered by the Sisters of Mercy in Merseyside.
Formerly the home of Frank Hornby (15 May 1863 – 21 September 1936) who was an English inventor, businessman, politician and inventor. He also founded the British toy company Meccano Ltd in 1908.

The building itself is listed and the roof is made of clay rosemary tiles would not allow for ” harsh” cleaning methods.

We applied our moss and algae treatment and initially the roof discoloured as the growths dyed off.  After a winter we reviewed the clean and the results were outstanding the roof looked “as new”. No harsh abrasives, no pressure washing and no access to the roof as it was sprayed from the eaves.