How to Repair a Steel Roof

What You'll Need
Epoxy Sealant
Steel Wool
Wire Brush
Urethane Roof Cement
Roofing Mesh
Putty Knife
Steel Roof Paint
Protective Equipment
Metal Shears
Epoxy Primer

A steel roof is very durable, but storms and acid rain can cause damage that can result in leaks. Sometimes, the steel gets rusty and corrode. In order to repair the damaged parts of the roof, here are some suggestions.

Step 1 – Cleaning the Roof

Wash the roof with water and brush away rust and corrosion using a steel wool or a wire brush. Do not use abrasive cleaning products. Mild soapy water is enough to dissolve the rust and dirt. Wash the entire roof thoroughly with water. Make sure to use protective equipment when working with chemical cleaners.

Step 2 – Determining the Cause of Damage

If the roof leaks, look for corroded or punctured areas. Leaky roofs can be repaired using epoxy sealant or urethane roof cement. A rusty roof can be repaired using a metal roof paint designed to provide protection against rust and corrosion.

Step 3 –Repairing Leaks Using Epoxy Sealant

Locate the punctured or rusted part of the roof, and clean its surroundings. Mix the sealant in a container. Stir continuously for 5 minutes. Apply the sealant over the hole using a putty knife. Allow the epoxy to cure for about 24 hours.

Step 4 – Repairing Leaks with Urethane Roof Cement

Measure the area around the damaged roof, and use that measurement to determine the area of the patch. Cut two roofing mesh patches using metal shears. The area of the patches should be the same as the calculated area of damaged roofing.

Apply the urethane roof cement evenly over the damaged area, and press the first patch on top of it immediately after. Add another layer of cement over the mesh, and cover it with the second mesh immediately afterwards. Check the manufacturer’s instructions to find out how long the cement needs to cure.

After the cement dries, apply a coat of epoxy primer over the patched area. Wait for the primer to dry before applying the finishing metal roof paint. Let the paint dry. If the entire roof is rusty, proceed to the next step.

Step 5 – Coating the Entire Roof with Metal Roof Paint

Consider painting the roof to protect it from further corrosion. Roof paints today are not just made for aesthetic purposes only; they are made to serve as extra protection for the roof. Many roof paints contain chemical compounds that work as a seal on the roof, which helps in repelling moisture and extreme heat.

Repair leaks and other areas in need of patch repair. Apply the epoxy primer over the roof thinly. Brush on several coats for extra protection. Next, apply the metal roof paint.

Some roof paint brands do not require a primer. If so, simply apply the paint onto the roof using a paint spraying device or a paintbrush. Wait for the paint to dry. Add a second coat to ensure maximum strength.