How To Touch Up Galvanized Steel Roof Panel Scratches

Secure the screws but do not overtighten.

How to touch up galvanized steel roof panel scratches.

The washer under the screw head should seal to the surface of the panel without bulging or shifting. Galvanized steel on the other hand cannot be painted with an oil based or aluminum based paint. This step is simple. My house was built circa 1880 and still has its original terne metal roof which consists of individual metal shingles with an embossed decorative pattern.

While these paint coatings are durable improper handling and installation can mar and damage the finish. The roof panels are installed similar to the wall panels in layout. Clean the scratched portion of the roof with the mineral spirits and then rinse with clear water and allow it to dry. Touch up and repair with zinc spray metallizing zinc spray metallizing is done by melting zinc powder or zinc wire in a flame or electric arc and projecting the molten zinc droplets by air or gas onto the surface to be coated.

Place a piece of scotch tape 610 over the touched up scratches and rub your thumb across this a dozen or so times with firm pressure. Scratches can easily be fixed with a paint or touch up pen designed to match the color of the roof. Using screws fasten roof at top and bottom of the sheet in the flat next to each rib. Let the paint dry for at least 48 hours.

Cut the first rib off leaving of rib on the first roof sheet of roof steel. Galvanized metal requires either a zinc dust type paint or a latex paint. Rub a gentle scrubbing cleanser onto rust spots on metal roofing using a clean cloth. Lay down the first roof steel panel squaring it with the mason line.

Dab a small paintbrush into metal touch up paint and then cover the scratched area with the paint. Touch up paint can cover unwanted scratches chips abrasion marks or other lightly damaged areas on the panel to present a consistent finish and appearance. Then pull the tape back like you are removing a band aid from a child s are. Use a paint pen or 1 4 artist brush only the narrow edge of the paintbrush should contact the scratch or blemish lightly sand or feather with 400 grit sandpaper for edges of deep scratches.

Below are steps to prepare the metal before using touch up paint. Install the roofing screws vertically along each rib in the panel. The zinc used is nominally 99 5 pure or better.