Roof Moss Removal & Cleaning

Living in the northwest of Ireland we’re all too familiar with seeing unsightly clumps of moss growing on our roofs.

Apart from being unsightly and generally taking away from the overall look of your house, if left untreated this moss will continue to grow over time and during the dryer months some of it will break away during heavy winds and get caught up in your gutters causing potential blockages and eventual gutter failure even more serious.

A lot of moss on a roof will hold moisture after spells of wet weather and can cause unnecessary additional load on the overall structure. During frosty winter months, the freeze-thaw effect on moisture retained by the moss can erode slates and tiles and in some cases causes breakages or long term damage.

Bio Wash as a business have invested in specialised equipment that can remove all excess moss from the surface of the slates or tiles without the use of pressure washers and without having to walk on your roof.

This means your roof is at no risk of any damage and it will be left as we found it minus the dirt, moss and algae.



We use telescopic poles and nylon scraping tools to remove 95% of the moss before applying a 100% environmentally friendly low pressure softwash treatment.

All this work is done from the ground for single storey dwellings or from gutter level with the use of a ladder for 2 storey dwelling.

3 and 4 storey properties are also possible using our hydraulic lift system.

This treatment attacks and kills the root of the moss and any other lychen or algae from the surface of the roof, leaving a protective film which prevents moss from reappearing for up to three years, depending on certain conditions.

Contact Us Today

  • Free, no obligation quotation
  • On site consultation if necessary
  • Free test panel clean available on request