Sherwin Williams Metal Roof Paint

Sherwin Williams Metal Roof Paint

April 14, 2009 A. The best way to paint galvanized material. DO NOT USE ALKYD BASED COATINGS. SAPONIFICATION WILL OCCUR. Any galvanized material has a soapy film. If the film is not completely washed off (which it is almost impossible not to miss a spot) the aklyd coating will not adhere to the substrate, only the soapy film creating a massive adhesion problem down the road. If you have already done that, paint it again with an acrylic coating and watch it fall off in sheets within 2 days. The best way to paint a galvanized surface is to remove all loose dirt dust etc. Paint it with Sherwin Williams DTM Acrylic, Metalatex, Sher Cryl or any other Industrial product a sales man or store management recommends. If you have an old metal roof with lots of rust and are willing to invest in the best coating system I have ever seen for extremely bad conditions, use Sherwin Williams MacroPoxy 920 primer, MacroPoxy 646 Intermediate coating and if you do not like a chalky paint film, topcoat it with an Acrylic coating listed above. I have done hundreds of barn roofs in the heartland of Ohio in the past 17 years and I have yet to see this system peel, flake or fade (when topcoated). I have had three roofs with issues but all three had actually rusted out from the inside and the panel itself basically disintegrated leaving the paint film behind. Pay to have the inside of your barn roof coated, it makes everything last much longer. melvin lucas – Dayton Ohio
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Sherwin Williams Metal Roof Paint

The best way to paint a galvanized surface is to remove all loose dirt dust etc. Paint it with Sherwin Williams DTM Acrylic, Metalatex, Sher Cryl or any other Industrial product a sales man or store management recommends. If you have an old metal roof with lots of rust and are willing to invest in the best coating system I have ever seen for extremely bad conditions, use Sherwin Williams MacroPoxy 920 primer, MacroPoxy 646 Intermediate coating and if you do not like a chalky paint film, topcoat it with an Acrylic coating listed above. I have done hundreds of barn roofs in the heartland of Ohio in the past 17 years and I have yet to see this system peel, flake or fade (when topcoated). I have had three roofs with issues but all three had actually rusted out from the inside and the panel itself basically disintegrated leaving the paint film behind. Pay to have the inside of your barn roof coated, it makes everything last much longer.
sherwin williams metal roof paint 2

Sherwin Williams Metal Roof Paint

Applying the Paint Apply the Sherwin-Williams paint and primer to a galvanized roof with a paintbrush or a roller specifically designed for corrugated metal. If crawling around on a metal roof in the hot sun does not sound like an ideal way to spend an afternoon, rent an airless sprayer to complete the project. Not only does a sprayer do a more thorough job than painting with a brush, it allows you to minimize the amount of time spent on the roof. If you spray, choose a windless day to paint.
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Sherwin Williams Metal Roof Paint

Type of Paint to Use 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 you need to first apply an undercoat of a galvanized metal primer such as Sherwin-Williams Pro Industrial Pro-Cryl Universal Acrylic Primer. Use the primer even if you add a topcoat of acrylic latex paint, because the primer inhibits rust and bonds better than paint. Paint, in turn, bonds better to the primer than it does to the bare substrate.
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Sherwin Williams Metal Roof Paint

Apply the Sherwin-Williams paint and primer to a galvanized roof with a paintbrush or a roller specifically designed for corrugated metal. If crawling around on a metal roof in the hot sun does not sound like an ideal way to spend an afternoon, rent an airless sprayer to complete the project. Not only does a sprayer do a more thorough job than painting with a brush, it allows you to minimize the amount of time spent on the roof. If you spray, choose a windless day to paint.
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Sherwin Williams Metal Roof Paint

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 you need to first apply an undercoat of a galvanized metal primer such as Sherwin-Williams Pro Industrial Pro-Cryl Universal Acrylic Primer. Use the primer even if you add a topcoat of acrylic latex paint, because the primer inhibits rust and bonds better than paint. Paint, in turn, bonds better to the primer than it does to the bare substrate.

Sherwin Williams Metal Roof Paint

A. While it is true that TSP is a great roof cleaner, we always recommend that the roof is first powerwashed using a 3500 psi tip. This will not only remove scaling rust but will also remove loose paint. If there is any mold or algae on the roof, add some bleach to the TSP mixture. When the roof is clean, spot prime all rusted areas with a good rust inhibitive roof primer and apply 2 coats of Calbar’s Showerproof “WB” metal roof paint. This application will last for at least 10 years.
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Sherwin Williams Metal Roof Paint

Galvanized metal roofs shed more easily than shingles or tiles, and this makes them useful in places where leaf, acorn and pine- and redwood-needle buildup is a problem. Metal roofs do not need much maintenance, other than an occasional cleaning and — very occasionally — a fresh coat of paint. Make use of the right kind of paint and primer from Sherwin-Williams to ensure best results whether you plan to paint an old roof or a new one.
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Metal Primers & Sealers When you want the best results on your metal product, you start with the best foundation — and that means metal primers from Sherwin-Williams. Our rust-inhibitive metal primers offer fast dry and full cure times to maximize production without sacrificing quality. Along with providing excellent adhesion to the full range of metal substrates, our versatile primer lines meet or exceed the most stringent regulatory requirements. Delivering strong corrosion resistance and lasting durability, our metal primer solutions are uniquely formulated to cover every industry need.
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When you want the best results on your metal product, you start with the best foundation — and that means metal primers from Sherwin-Williams. Our rust-inhibitive metal primers offer fast dry and full cure times to maximize production without sacrificing quality. Along with providing excellent adhesion to the full range of metal substrates, our versatile primer lines meet or exceed the most stringent regulatory requirements. Delivering strong corrosion resistance and lasting durability, our metal primer solutions are uniquely formulated to cover every industry need.
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Q. I am remodeling an old (circa 1918) house with a galvanized sheet metal roof of undetermined age. The roof is solid with only a few rust spots and some areas of algae/mildew. It has never had any paint or other coating that I can tell. I would like to paint it, either keeping the original silver/galvanized look, or if feasible change it to a red color that I have seen on some new metal roofs. The problem is that, checking with Home Depot and several paint stores, no one seems to know how to do this and don’t have any paint products to recommend. The closest was a Duron store where they had a white primer recommended for galvanized metal. They said I would then have to put a couple of coats of an oil-based (expensive – $30+/gallon) red paint on top of the white primer. It seems like there would be a better, less expensive route. Any product/method suggestions?
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A. The very best way to paint galvanized metal. 1) Wash metal with Jasco metal etch. 1 part etch to 3 parts water. Apply with sponge in scrubbing motion. 2) Rinse metal etch off metal with clean water. 3) Make sure metal is completely dry. 4) spray metal with a shellac based primer. One coat is sufficient. This primer can be found in a spray at most paint or hardware stores. 5) Brush, roll, or spray paint with any high quality exterior paint. Apply at least 2 coats.
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Roof Safety You cannot set up roof jacks on a metal roof as you can on a shingled one, so if you plan to paint with a brush or roller, include a safe way to reach the ridge in your plans. If the roof pitch is more than a 4:12 pitch — which means a 4-foot rise in a 12-foot span — there may not be a safe way to do this without installing permanent anchors. If you don’t want to do that, airless spraying with a 4- or 6-foot wand may be your only viable option. Even if the roof has a low pitch you should always wear slip-proof shoes when walking on it. For added security, wear a safety harness tied off with a safety line to something that can support your weight in case you fall.