How Do You Clean A Metal Roof Before Painting

Clean the mold and mildew.

How do you clean a metal roof before painting.

Rinse and let the metal dry. When a panel section is clean rinse the washed panels with fresh water. However many metal roof owners want to retain or restore the luster that their metal roof provided when it was brand new. Use a rag to apply to affected spots and use circular wiping motions.

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. Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water. Remove all rust using your wire brush or sandpaper. How to clean metal roofing.

If a panel becomes difficult to clean continue rubbing longer but do not increase pressure. A wire brush or sandpaper may help loosen tough areas of paint. Scrape away any loose or flaking paint using your putty knife. Wash the metal thoroughly with a degreasing agent such as trisodium phosphate.

Soak a heavy cloth or sponge with glasswax. 5 parts water 1 part diluted hydrochloric acid or citric acid or muriatic acid or oxalic acid or vinegar. For light rust and small areas use steel wool and 80 to 120 grit sandpaper. 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. 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. To clean a metal roof wait for a dry overcast day and make sure you have a partner to help you for safety reasons. Spray this mixture onto the roof and agitate it with a soft bristled brush to get it clean.

Clean the dirt and debris. To remove severe rust stains. Inspect the surface for rusty areas and remove all rust down to the bare metal using tools appropriate to the extent of the rust. First of all assess the overall condition of the surface.

However badly rusted metal areas need more prep work and possibly a special primer. Beginning at the bottom portion of a panel section wipe in a left to right motion until clean. The first step is to clean off loose rust and flaking paint and then apply a rust inhibitive primer. Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.

Remove the particles or pieces that are causing the rust stains. How do i repaint a metal roof on an old house. To properly prepare new metal surfaces use mineral spirits to remove grease and apply a rust inhibitive primer before painting. Simple forms of roof cleaning like a light washing with a water hose will prevent algae and other agents from forming on the roof.