Coating an Aluminum Roof the Right Way

What You'll Need
Aluminum roof coating
Soft bristled broom or airless sprayer
Roof patching materials
Roof coating primer
Pressure washer

Adding an aluminum roof coating to your rooftop is a very important step to ensure that your roof remains in good shape for years to come. Between rain, snow, high winds, heat, and other factors, your roof is likely to take a pretty severe beating at some point, regardless of the climate you live in. A good aluminum roof coating will help protect it by guarding against cracks, leaks, pollutants, and other damage as well as reflecting as much as 70 percent of the suns rays. You don’t have to be a professional to apply a professional quality aluminum roof coating, though there are some very important steps that you should follow if you’re thinking of taking this job on yourself.

Step 1 – Clean Your Roof

How well your aluminum roof coating sticks to your roof depends on how well you prepare the roof itself. First things first, you need to remove all dirt, debris and other materials sticking to your roof. Go over the entire roof with a broom or a vacuum for this. For extra cleaning, you can use a pressure washer to really hose down the roof.

Step 2 – Inspect and Repair

Once it is completely clean, start a careful inspection of your roof. It is important that your roof be in the best condition possible when you apply the aluminum roof coating. This means looking for leaks and cracks, as well as loose, worn, or otherwise damaged shingles. Make your repairs as you find the problems. Make sure that if you use any roof patching sealant in your repairs that it has enough time (and adequate weather conditions) to completely cure before moving on.

Step 3 – Roof Coating Primer

Asphalt shingles don’t generally have a problem with your aluminum coating adhering to them, but there are other roof materials you may come across that will need a primer. Primers are designed to allow a specific roof material (often referred to as a substrate) to adhere to a specific type of aluminum roof coating. Materials that commonly need a primer include metal flashings and edgings, gravel stops, concrete and other masonry, and porous surfaces like gypsum. Asphalt primers are also available, but not always necessary.

Whatever primer you end up using (if any), be sure that it is compatible with both the roof surface and the roof coating, and that you follow all manufacturer’s instructions for applying it.

Step 4 – Applying Your Aluminum Roof Coating

Make sure that all sealants and primers are completely dry before applying your roof coating. Also, make sure that water, whether from pressure washing or rain, is completely evaporated or dried. Likewise, plan on coating your roof when warm, cloudless weather is expected.
You can use either an airless sprayer or a soft-bristled broom to apply your roof coating. If using the broom, apply each stroke in the same direction to ensure that the aluminum flakes have a uniform light reflection. If using the sprayer, any sprayer will do that is capable of applying the coating material in an even pattern.