Posts Tagged ‘Roof Coatings to Metal Roofs’


How to Apply Roof Coatings to Metal Roofs

Tuesday, January 7th, 2014

How to Apply Roof Coatings to Metal Roofs - Roofers

Prolong the life of roofs and significantly lower cooling costs by applying elastomeric roof coatings to metal roofs. Doing so will make the roof sustainable, requiring only periodic recoating, and delaying the need for costly roof replacement.

It is important that the person who will perform the job have some experience and knowledge about roof coatings, metal roofs, and working safely on a roof.

Before starting the job, the type of roof should be considered. Is the roof suitable for elastomeric coating? Bare metal roofs at least three months old offer better adhesion. Also, what is the condition of the roof, fasteners, and seams? Are there problems with corrosion, leaks, or drainage? Can these metal roof problems be resolved easily?

Once you’ve sized up the work to be done, follow these basic steps to applying roof coatings to metal roofs.

Step 1: Prepare the Area.

Clean the surface of the roof by pressure washing it using a strong cleansing product to eliminate contaminants. Then, rinse the area thoroughly and leave it to dry.

Step 2: Make Necessary Repairs.

Tighten any loose metal fastener or replace if necessary. If you have an older roof, apply a generous layer of crack and joint sealant over flashings, seams, joints, and fastener heads.

Put polyester roof fabric (4 to 6 inches) into wet compound and recoat with the sealant. Fix all gaps following the same steps.

If there are any panels, flashings, or other hardware with more than half an inch of a gap, these should be replaced. Any surface corrosion must be removed.

The appropriate metal primer should then be applied.

Step 3: Apply the Coating

Once you’ve finished cleaning and repairing the roof and the sealant has been completely dried, you can then apply the elastomeric coating.

First, apply a primer, or basecoat, and then a topcoat that offers excellent durability and resistance to dirt. In most cases, the application is done with the use of an airless spray designed for elastomeric roof coatings. A gallon of basecoat covers around 120 square feet while a gallon of topcoat covers around 100 square feet.

You want to coat the roof evenly and coat all flashings and seams well. Any areas that collect water should be given an extra coating. It is advised to hire an experienced roofer for consistent spray application.

Steps 4: Inspect the Roof

When the coating has dried adequately and you can walk on it, carefully go over the roof to check for any areas where the coating is thin or for any seams or flashings that were not properly sealed. If you find these problems, correct accordingly.

Hire an Expert!

Seva Call can assist you in finding a professional roofer who knows all about roof coatings for metals roofs. Contact us, and we’ll locate up to three of the most capable local roofers and put you directly in touch with them. Find the professional help you need now.