Assess the scope of the project.
How do you clean a metal roof before painting.
It requires a lot of effort to prep and clean off an.
Scrape away any loose or flaking paint using your putty knife.
Scrape paint and corrosion.
Rinse and let the metal dry.
Beginning at the bottom portion of a panel section wipe in a left to right motion until clean.
Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water.
To remove severe rust stains.
Wash the metal thoroughly with a degreasing agent such as trisodium phosphate.
Spray this mixture onto the roof and agitate it with a soft bristled brush to get it clean.
When a panel section is clean rinse the washed panels with fresh water.
Simple forms of roof cleaning like a light washing with a water hose will prevent algae and other agents from forming on the roof.
To properly prepare new metal surfaces use mineral spirits to remove grease and apply a rust inhibitive primer before painting.
For painted surfaces that are in sound condition remove dust with a clean dry cloth de gloss the surface with light sanding and wipe with mineral spirits to ensure good adhesion.
You don t need to get down to bare shiny metal just clean off the flakes and powdery surface rust that prevent paint from adhering.
Sand the entire metal roof surface very lightly with your wire.
However badly rusted metal areas need more prep work and possibly a special primer.
Use a rag to apply to affected spots and use circular wiping motions.
5 parts water 1 part diluted hydrochloric acid or citric acid or muriatic acid or oxalic acid or vinegar.
If a panel becomes difficult to clean continue rubbing longer but do not increase pressure.
First of all assess the overall condition of the surface.
To clean a metal roof wait for a dry overcast day and make sure you have a partner to help you for safety reasons.
Clean the mold and mildew.
When you re ready to get started spray your roof using a garden hose with a spray nozzle attachment starting at the top of the roof and blasting downward so the dirty water runs off the sides.
Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.
How do i repaint a metal roof on an old house.
Remove all rust using your wire brush or sandpaper.
Inspect the surface for rusty areas and remove all rust down to the bare metal using tools appropriate to the extent of the rust.
Remove the particles or pieces that are causing the rust stains.
Soak a heavy cloth or sponge with glasswax.
However many metal roof owners want to retain or restore the luster that their metal roof provided when it was brand new.
Clean the dirt and debris.
How to clean metal roofing.
