Painting Old Tin Roof

If you re planning to paint a brand new raw tin roof you don t need to do much preparation work.

Painting old tin roof.

This step removes mildew dirt and any loose bits of old paint that can cause adhesion problems. Not using a sealant. The term tin is a misnomer in this situation. If you re not sure what kind of roof you have ask a professional roofer to inspect it before you paint it.

Make sure to use a putty knife to scrape and scratch away all loose pealing paint. Just before painting wash the roof with a power washer at a pressure of 2 500 pounds per square inch whether it is a new or an old one that requires re painting. Be extremely careful not to pierce the metal when scraping. Generally a tin roof is referring to one of two things.

Try to achieve a slightly abraded texturized finish as this helps your new paint bond with the roof finish. Water resistant metal roofing paint for example can be of great value if you live in a rainy area. Sand the entire metal roof surface very lightly with your wire brush or sandpaper. For pricing and availability.

If you have a terne metal roof like this one then it has probably been repainted several times over the years. 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. The first incarnation of the tin roof was a sheet of steel with a tin coating on the surface to prevent oxidization. It is very rare to find an actual tin roof.

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. However if the old roof already has a coat of paint on it you ll need to prepare the surface for the fresh coat of paint. Terne tin is a little trickier to determine. This is why when you are considering painting your metal roofing it makes sense to go for specific paints for the metal roof.

Although it isn t recommended to use a metal implement to scrape the roof it was the only way to remove the loose rust and old paint. Black jack silver seal 300 4 75 gallon aluminum reflective roof coating 3 year limited warranty item 12035. Whether your roof has been painted previously or not powerwash just before you start painting.