In this case mix one gallon of bleach with five gallons of water and add one cup of dish soap.
How to clean galvalume roof.
Chlorine bleach trisodium phosphate and water.
Mix 1 2 cup of tri sodium phosphate tsp in a gallon of water in a bucket.
Allow the galvalume to dry for at least two hours.
Spray this mixture onto the roof and agitate it with a soft bristled brush to get it clean.
The strength of the solution will depend upon the amount of dirt built up on your metal roofing.
For any areas that don t wash away with pressurized water fill a bucket or other container with water.
For every part water combine 0 05 part mild dish or laundry detergent.
Solutions for these ingredients depend on the amount of discoloration.
If you are using amonia mix one cup with five gallons of water.
Step 1 wash the galvalume with a water based degreaser using a coarse plastic brush.
Below is a partial excerpt cut and pasted below from arma.
To avoid streaks start cleaning at the bottom edge of the roof and work your way up rinsing frequently with lots of fresh water.
If needed increase the amount to cover a larger area while keeping the same proportion of water and tsp.
Rinse the galvalume using a pressure washer or wet rags.
Tsp is available in most paint or home improvement stores.
Mix water and mild detergent for stubborn areas.
Regular maintenance will reduce the amount of dirt and chemical buildup that forms on your steel over time and will make cleaning easier in the future.
Opt for something soft to protect your roof s paint and parts.
Wipe down your galvanized steel with a damp rag.
Algae discolorations to remove from roofing surfaces applying a solution of.
Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water.
An initial cleaning with a rag dipped in fresh water will remove any dirt or streaks on your galvanized steel.