Prepare Corrugated Iron Roof Painting

Step 1 clean the roof.

Prepare corrugated iron roof painting. This means that the oil from fabrication has worn away and the iron has been slightly etched through weathering. Then plan on washing the roof with a power washer so it s clean when you apply the paint. Touch up areas inaccessible to the roller using the 3 or 4 inch nylon paintbrush. How to paint a corrugated iron roof if you are painting a new iron roof you will need to wash it with a degreaser before you start unless the roof is more then a year old and has weathered.

Wait three hours for the metal to dry. You ll then apply one coat of primer and two coats of paint to your roof although you may need to apply additional coats of paint depending on how dark and rich you want the color to be. If your roof is unpainted prime it with a metal primer. Use a power washer or brush with a mild cleaner to remove grime and debris.

Roll in a vertical motion working backward toward the extension ladder. Now that your roof is cleaned and primed you can start painting. You ll get the best results if you use brushes or rollers designed for a metal roof. Before applying a new coat of paint you need to get rid of any oil debris and dirt buildup that already exists.

Begin at the far side of the roof. My house was built circa 1880 and still has its original terne metal roof which consists of individual metal shingles with an embossed decorative pattern. Use a long handled paint roller and apply primer until no portion of the metal is visible. You ll need to prepare the roof by scraping away loose paint and rust with a paint scraper or putty knife.

Wait four hours for the primer to dry. The first trick to corrugated metal roof is to not paint a dirty metal roof. Galvanized metal requires either a zinc dust type paint or a latex paint. Pour an exterior grade rust inhibiting primer into a paint tray and apply it to each roof panel.

Step 2 maintain the roof. Roof preparation for a new and unpainted roof allow it to weather for six months before painting it.