Home Improvement Ideas Home Exteriors Siding How to Repair Aluminum Siding in Less Than an Hour These common techniques are crucial for any homeowner with aluminum siding. You'll learn how to make a small patch and fill in a dent. By Caitlin Sole Caitlin Sole Instagram Caitlin is the senior digital home editor at Better Homes & Gardens, where she covers all things home, including decorating and interior design, cleaning and organization, paint and color, home improvement, and more. She is a writer and editor with nearly a decade of interior design education and expertise. She has vast experience with digital publishing, including SEO, photoshoot production, video production, eCommerce content, print collaboration, and custom sales content. Caitlin graduated with a bachelor of journalism, with an emphasis in magazine editing, as well as a minor in textile and apparel management from the University of Missouri-Columbia. She also received a multicultural certificate. Caitlin regularly attends trade shows and industry press conferences for market research and continued education. Learn about BHG's Editorial Process Published on May 30, 2018 Share Tweet Pin Email Photo: Kritsada Project Overview Total Time: 1 hour Skill Level: Kid-friendly Most aluminum siding joins together like vinyl, which means that in order to make a repair, you'll need to patch a damaged area or replace a panel. This tutorial shows you both techniques. Be aware that metal corner caps are sometimes used instead of corner posts for aluminum siding, and in older installations, they were often used for wood or hardboard lap siding as well. If your local supplier does not have caps to match the ones on your house, check online sources; it helps if you know the manufacturer's name. In a pinch you can cut and shape a piece of sheet metal to fit, using an old cap as a template. Also, know that aluminum siding can and should be painted. Scrape any flaking paint, and sand smooth. Pressure-wash and allow to dry. Apply an alcohol-based primer or an oil-based primer that has been thinned with 2 cups of thinner per gallon of primer. Apply acrylic paint. Most repairs will take less than an hour, and you'll only need simple cutting and measuring skills. Before you begin, check the siding closely for further damage to determine how large a section of siding needs to be replaced. What You'll Need Equipment / Tools 1 Hammer 1 Tape measure 1 Pliers 1 Putty knife 1 Nail set 1 Lineman's pliers 1 Taping blades 1 Flat pry bar 1 Tin snips 1 Hacksaw 1 Sanding block 1 Scraper 1 Caulking gun 1 Ladder Materials 1 Butyl caulk 1 Replacement end caps 1 Auto-body filler 1 Sandpaper Instructions Cut Out Damaged Area Tap with a hammer to indent the damaged area or use tin snips or a utility knife to cut it out. Cut Patch Cut a patch 4 inches longer than the damage and cut off the nailing flange. Test the fit; the patch should just slip under the siding above. Apply Caulk Apply beads of butyl caulk on each side of the patch area and around the hole. Press the patch into place. Use duct tape to hold it in place while the caulk dries. Pull Out Screw If a dent is deep, partially drive a coarse-threaded screw into the center and pull it partway out with a pair of pliers. If part of the damaged area protrudes, tap with a hammer to indent it slightly. Apply Auto-Body Filler Scrape and sand away any loose paint. Clean with a mild detergent solution, rinse and allow to dry thoroughly. Mix a batch of auto-body filler and apply it over the indentation, using the plastic scraper that comes with the filler. Scrape and Paint When it gets hard but not dry, generally shape the filler with a scraper. When it dries use a hand sander to smooth the patch. Prime and paint.