Moss Algae on roof – Maricourt convent magull

Moss, algae, and lichen growth can significantly impact the appearance and longevity of roofs, especially on historic and listed buildings. When Maricourt Catholic High School in Maghull, Merseyside, United Kingdom, required professional cleaning to remove unsightly organic growth from its roof, our expert team was called in to handle the task with the utmost care and precision.

removing moss buildup from roof in Manchester

Moss Algae Treatment Project for Maricourt Catholic High School, Maghull

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 home of Frank Hornby (15 May 1863 – 21 September 1936), who was an English inventor, businessman, and politician. He also founded the British toy company Meccano Ltd in 1908. The building itself being listed and the roof being made of clay rosemary tiles would not allow for “harsh” cleaning methods.

Imge of moss on roof before cleaning in preston Lancashire

Challenges of Cleaning Historic and Listed Buildings

Listed buildings come with unique challenges when it comes to roof cleaning. Unlike modern buildings that may allow for more aggressive methods such as power washing, older buildings require a more delicate approach.

The clay rosemary tiles on the school’s roof meant that traditional cleaning methods could potentially cause irreversible damage. Our team had to consider these factors while ensuring a deep and thorough clean.

Key Challenges:

  • The building’s historic significance required a non-invasive cleaning method.
  • The clay rosemary tiles were fragile and could not withstand pressure washing or abrasive cleaning.
  • Moss and algae were deeply embedded in the surface, requiring a specialised treatment to ensure complete removal without damaging the tiles.
  • No direct access to the roof was available.

Our Cleaning Approach

When dealing with historic and fragile surfaces, choosing the right cleaning solution is crucial. Rather than opting for pressure washing, which could have damaged the tiles, we implemented a soft wash treatment using specialized moss and algae cleaning solutions.

Step-by-Step Process:

  1. Assessment: We conducted a full roof assessment to understand the extent of the algae and moss infestation.
  2. Preparation: Safety measures were put in place, and surrounding areas were protected from runoff.
  3. Application: We applied our moss and algae treatment. Initially, the roof discoloured as the growths died off.
  4. Natural Breakdown: The cleaning solution worked over time, breaking down moss and algae without harming the structure.
  5. Post-Treatment Review: After a winter, we reviewed the clean. The results were outstanding—the roof looked “as new.”

Why Soft Wash Cleaning?

Soft washing is an effective alternative to pressure washing, particularly for delicate surfaces like clay tiles.

The key benefits include:

  • Preserving Structural Integrity: No risk of cracking or loosening tiles.
  • Thorough & Long-Lasting Results: Kills moss and algae at the root, preventing rapid regrowth.
  • Eco-Friendly Approach: Uses biodegradable cleaning agents that do not harm the environment.
  • No Roof Access Needed: Our treatment was applied from the eaves, ensuring complete coverage without stepping onto the roof.

Final Results:

  • No harsh abrasives were used.
  • No pressure washing was required.
  • No direct access to the roof was necessary.
  • The roof was left in a pristine condition, with the clay tiles appearing fresh and rejuvenated.
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Chris Spruce Cleaning Service ltd
SD Office, 491 Wight Moss Way, Southport PR84 ZZ
Phone: 0800 0933 267
Email: info@cleaning-service.uk.com
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Our Expertise in Historic Building Cleaning

We specialise in cleaning historic and listed buildings, ensuring they remain in pristine condition without the risk of damage.

Our team has worked on numerous projects, delivering exceptional results while adhering to the highest standards of preservation.

If your property is facing similar moss and algae issues, we are here to help.

Whether it’s a historic building, a commercial property, or a residential home, our expert team ensures safe and effective cleaning tailored to your needs.

Chris Scott - Owner Cleaning Service Ltd

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