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.
How to spray paint a tin roof.
Apply the sherwin williams paint and primer to a galvanized roof with a paintbrush or a roller specifically designed for corrugated metal.
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To clean a metal roof wait for a dry overcast day and make sure you have a partner to help you for safety reasons.
Not using a sealant.
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.
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To paint a metal roof you ll need to use an oil based paint if you have a terne metal roof or an acrylic based paint if you have a galvanized metal roof.
This is why when you are considering painting your metal roofing it makes sense to go for specific paints for the metal roof.
Painting metal roofing provides you with a number of steps and decisions throughout the process.
If you re not sure what kind of roof you have ask a professional roofer to inspect it before you paint it.
Whether your roof has been painted previously or not powerwash just before you start painting.
If you want to paint a new metal roof though you can prepare it by washing with a weak acid such as diluted vinegar to remove oils and residue first.
How doers get more done.
Water resistant metal roofing paint for example can be of great value if you live in a rainy area.
If crawling around on a metal roof in the hot sun does.
Galvanized metal requires either a zinc dust type paint or a latex paint.
This step removes mildew dirt and any loose bits of old paint that can cause adhesion problems.
You ll also need to purchase a primer designed for metal roofs.