Things To Consider Before Having Your Galvanized Roof Painted

If your galvanized metal roof is looking a bit tired, you can easily rejuvenate its appearance by having your contractor add a few coats of paint to it. In addition to freshening up its appearance, a fresh coat of paint can also add to your metal roof's overall durability. However, there are a few things you'll need to consider when having your galvanized metal roof painted.

Does It Need Extensive Prep Work?

Good prep work often means the difference between an attractive, high-quality paint job and a poorly-done paint job that deteriorates quickly. Before making a single stroke, your contractor should carefully inspect the roof for signs of rust and other damage. Dents, rust and other trouble spots must be repaired before the roof can be painted.

Your contractor may sand-blast problem areas to remove light areas of rust and use metal shears to cut off areas affected by severe rust and corrosion. Sand-blasting also helps remove mildew that can also contribute heavily to rust issues.

Is Your Galvanized Roof Brand-New?

A brand-new galvanized roof seems like the perfect canvas for a fresh paint job, but there's a good chance you won't be able to have it painted right away. Galvanized surfaces can prove difficult for paint to hold onto, especially when said surfaces are brand-new. For this reason alone, you'll want to wait for the galvanized metal to weather a bit before having your contractor apply the first coat of primer.

It normally takes about 6 months before a brand-new galvanized roof has weathered enough to be painted. However, you can help speed this process along by washing the roof with a 50/50 mix of white vinegar and water. The weak acid solution strips away all the oils and other materials left over from the galvanizing process. Just remember to have the roof power-washed afterwards in preparation of the actual painting.

Is Your Home Close to the Sea?

If your home lies close to large bodies of salt water, then you'll want to make sure your roof receives extra protection to combat rust problems aggravated by salt water spray. Instead of having just a single coat of primer applied, your contractor should double the number of primer coats made. This will help protect the underlying metal against accelerated rust and corrosion.

In addition to having the roof surface properly primed, the underside of exposed galvanized soffits must also receive extra coats of primer. Otherwise, salt water can get into these areas and create serious rust issues, even if the rest of the roof is properly protected.

Caring for Your Roof Afterwards

After your contractor finishes painting your galvanized metal roof, you'll want to make sure that it stays in excellent condition for years to come. Here are a few maintenance tasks you'll need to perform from time to time:

  • Every few weeks, you'll want to clear away dead leaves, fallen branches and other assorted debris from the roof. It not only keeps your roof clean, but it also keeps small animals from taking up residence within your roof, since it's much harder to find nesting material.
  • Every 6 months, you'll also want to have your roof power-washed to keep dirt and grime at bay. It'll also help keep problematic mold growth at bay. You can also use special bleaches and detergents to neutralize mold and algae.
  • Every year, you or a metal roof contractor should perform a visual inspection of the painted roof. Check for any areas that show peeling paint or rough spots in the paintwork. Also look out for bubbled paint, as it's often a sign of underlying rust and corrosion.

It's crucial to keep these tips in mind if you want your galvanized metal roof's paint to last for the next few years.


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