About Bio-Shield

Bio-Shield ®

Performance and Reliability

Bio-Shield® will clean your roof and provides extended protection to the decorative and protective coating from the damage caused by moss, algae, and lichen.

Bio-Shield® – Proven Performance gives you peace of mind.

We have used Bio-Shield commercially for over 37 years. It has proven to effectively clean-up any roof, removing all moss, algae and lichens. 
Bio-Shield is applied professionally, in a quick simple application without the potential problems created by inexperienced contractors on your roof.

Roof Cleaning with Bio-Shield has none of the mess, damage and potential water leaks caused by water blast cleaning – the application is simple, quick and very effective.

Andy van Lier
Managing Director

Cleans Your Roof and Keeps it Clean.

What is Bio-Shield®

Bio-Shield is a biodegradable, hard surface sanitiser with very low toxicity to humans, animals and plants.  Bio-Shield selectively and powerfully kills moss, algae, lichen on any roof surface. When applied to your roof, Bio-Shield will immediately start working to kill these damaging growths and gives a complete kill within hours.

How does Bio-Shield® Work

Bio-Shield does not give an instant clean roof – your roof self-cleans gently over time as rain and wind work to remove the dead growth. The clean-up process starts around 2 to 3 months after application, once the dead growths have decayed enough to be washed away by rain. The clean up process may take up to 12 months to complete. Clean up times depend on the type of roof,  how much growth is present and how much rain falls.

Bio-Shield will clean your roof without causing any of the damage associated with harsh chemicals or water blast cleaning.  With no moss, lichen or algae on the roof, the high quality factory coating is protected from damage. 

How to Maintain your Roof with Bio-Shield®

After 2 to 3 years spores that have naturally settled on your roof will begin to grow into visible algae and lichens when conditions are favourable. 

Re-applying Bio-Shield every 2 to 3 years will keep your  roof clean and protected.
When roofs are treated regularly with Bio-Shield, any new regrowth is quickly removed – sometimes within weeks, leaving the roof clean for another 2 to 3 years