Painting Galvalume Siding

If you re attempting to paint siding panels roof flashing or other materials that have seen exposure to the elements a thorough cleaning is necessary to eliminate any organic contaminants from the outer surface.

Painting galvalume siding.

The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel. Go over the metal with a wire brush to remove any oxidation. Painted metal roofs come with a baked on factory finish and you can re coat these as well as paint bare metal roofing with acrylic latex paint. You can also use oil based alkyd paint but.

White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent. Common household products like comet mineral spirits and chlorine bleach can all be used to prepare galvanized steel for painting. Most galvanized materials will have a light coat of oil to protect the surface while in transition. All of the listed coatings will give good results.

Usually it s necessary to clean off this coating before applying any paint. Prime the surface with a primer made for metal. All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface. The vinegar is a mild acid which acts to etch the galvanized coating so the paint will stick.

Use a long handled paint roller and apply primer until no portion of the metal is visible. The areas to be painted should be dry and clean of visible soil grease oil or other contaminants. Pour an exterior grade rust inhibiting primer into a paint tray and apply it to each roof panel. Wipe the galvanized surface down with white vinegar.

Galvalume will reject paint unless it is properly treated. Galvalume is a type of sheet steel used in a variety of applications including roofing siding furniture gutters and pipe. If you have a kitchen then you probably already have this handy solution. The secret to painting galvanized steel is white vinegar.

The following paints are suggested for field painting galvalume. To paint galvalume good coating practice should be observed as with painting any surface.