Roof Surfaces

Pre-Painted Roofs

If your roof has been previously restored and has moss growing on it, most people think that pressure cleaning is the solution to keeping the roof clean. Unfortunately depending on the quality of the paint coats and primer pressure cleaning can remove the colour coats leaving the roof looking faded and untidy.

Moss Roof Treatment is perfect for Pre-Painted roofs as it does not affect the paint coats. MRT will kill the moss, mould & lichen on the tiles, it will then wash off overtime, revealing the colour coats, keeping the roof clean.


Pre-Application Preparation

SWMS to be filled in by tradesmen

Trailer/Unit to be parked in driveway or safe suitable location

Tradesmen to set up safe work area – ladders, signage and block off areas

Tradesmen to discuss water access and diverting water tanks if required

Water Tanks to be diverted as a precaution by tradesmen or organised before tradesmen arrives at worksite

Tradesmen to set ladders and secure them

Tradesmen to speak to neighbours about work being conducted and discuss any concerns

Customer to move pot plants undercover to avoid overspray, tradesmen can also do this if required

Customer to organise covering valued plants and vegie gardens or organise with tradesmen to do so

Customer to move cars out of driveway/away from spraying to avoid overspray

Customer to secure pets away from working tradesmen

Tradesmen to wear appropriate Personal Protective Equipment

Tradesmen to check for powerlines

Work can now be commenced

Divert Water Tanks
Safe Working Area
Access to Water Required
Prepare Machine
PPE Worn
Cover up plants
Fill up with MRT solution
Secure pets from area


Tradesmen to apply Moss Treatment to areas specified in quote

Saturate green moss, black mould & yellow lichen

Tradesmen to take photos of MRT being applied for customer online system

Tradesmen to avoid roof access and apply from specialised ladders

Avoid walking on roof (disturbing tiles etc.)

Saturate Moss with Treatment
Coat Ridge Caps and Front Edges of Tiles


Tradesmen to wash down plants where overspray may have occurred as a precaution

Tradesmen to speak to customer - discuss what to look for – colour change in moss

Water tanks to be left diverted for 6-8 weeks or after 4-6mm of rainfall has occurred

Tradesmen to put up job sign

Tradesmen to upload images to online system for customer to view

Wash Down Plants
Put Up Job Sign

What To Look For After Application

2-3 weeks colour change from green to brown/yellow

Dead moss on ground- blown off roof

North facing sides clean quicker than south facing sides

Moss moving down the tiles – piling in areas

First 6 months you will notice little changes on roof.

12-18 months is where most of the changes are noticed

- Areas that are more exposed to wind and rain will clean quicker

- Sheltered areas will be dead, but may take longer to be dislodged by the wind and rain

Dead moss will crumble into dust and when washed away it will keep the gutters clean in normal rainfall

Northsides Clean Quickest
Moss on Ground
Crumbling Moss

Moss Roof Treatment is the soft solution for cleaning pre-painted roofs

Pre-painted Moss Roof Treatment Application

Before and After Pre-Painted Application


Application Completed 11-08-2017


12 Months Later


Application Completed 28-07-2015


13 Months Later

Moss Roof Treatment is for those who just want to keep their roof clean!