How Do You Clean A Metal Roof Before Painting

First of all assess the overall condition of the surface.

How do you clean a metal roof before painting.

Clean the mold and mildew. To remove severe rust stains. 5 parts water 1 part diluted hydrochloric acid or citric acid or muriatic acid or oxalic acid or vinegar. Wash the metal thoroughly with a degreasing agent such as trisodium phosphate.

Beginning at the bottom portion of a panel section wipe in a left to right motion until clean. Sand the entire metal roof surface very lightly with your wire. For light rust and small areas use steel wool and 80 to 120 grit sandpaper. To clean a metal roof wait for a dry overcast day and make sure you have a partner to help you for safety reasons.

Simple forms of roof cleaning like a light washing with a water hose will prevent algae and other agents from forming on the roof. However many metal roof owners want to retain or restore the luster that their metal roof provided when it was brand new. To properly prepare new metal surfaces use mineral spirits to remove grease and apply a rust inhibitive primer before painting. Assess the scope of the project.

How do i repaint a metal roof on an old house. Scrape away any loose or flaking paint using your putty knife. Spray this mixture onto the roof and agitate it with a soft bristled brush to get it clean. A wire brush or sandpaper may help loosen tough areas of paint.

The first step is to clean off loose rust and flaking paint and then apply a rust inhibitive primer. When a panel section is clean rinse the washed panels with fresh water. If a panel becomes difficult to clean continue rubbing longer but do not increase pressure. Rinse and let the metal dry.

How to clean metal roofing. Soak a heavy cloth or sponge with glasswax. It requires a lot of effort to prep and clean off an. Inspect the surface for rusty areas and remove all rust down to the bare metal using tools appropriate to the extent of the rust.

Scrape paint and corrosion. Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water. 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. Remove the particles or pieces that are causing the rust stains.

Use a rag to apply to affected spots and use circular wiping motions. 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. Remove all rust using your wire brush or sandpaper.