How to Seal a Garage Door
A well-sealed garage door keeps out weather and pests and helps maintain your home's energy efficiency. While a reliable garage door company can handle professional installations, sealing your garage door is a manageable DIY project with the proper preparation and materials. This guide walks you through each step of the process, from checking your door's condition to testing the final seal.
Assessing the Garage Door
Start with a thorough inspection of your door's current state. Look for visible wear like cracks, gaps, or rust spots. Examine the weather-stripping and existing seals for signs of damage. Check that tracks and rollers work properly without misalignment. Run your opener through a few cycles to catch any odd noises or motion issues. Pay close attention to gaps around the edges where drafts might enter. A good assessment helps you spot all problem areas before you begin sealing.
Selecting the Right Seal
Pick your seal based on three main factors: door material, local weather, and insulation needs. Wood doors work best with flexible vinyl or rubber seals that move with the wood's natural expansion. Metal doors might need stiffer seals to maintain pressure. Consider your climate - extreme temperatures demand better thermal protection. Think about insulation, too - thicker seals block more air but need more clearance to work properly.
Preparing the Surface
Clean thoroughly before applying any sealant. Mix mild soap or degreaser with water and scrub away dirt, grime, and old residue. Use a stiff brush on tough spots and grease. Rinse everything completely with clean water to remove cleaning products. Let the surface dry fully - trapped moisture under your seal will cause problems later. Good preparation ensures your new seal sticks properly and lasts longer.
Applying the Sealant
Mix your sealant well before starting. Use a brush or roller to apply from top to bottom in smooth, even strokes. Work carefully around edges and corners to create tight seals. Let the first coat dry according to package directions before deciding if you need a second layer. Check your work for missed spots or thin areas, touching up as needed. Give everything plenty of time to cure before moving on to testing.
Testing the Seal
Check your work thoroughly once the sealant cures. Start at the bottom, looking for gaps where light shows through. Run your hands along the sides to feel for consistent contact with the frame. Spray water along the edges to check for leaks. Try using a smoke pencil to spot air movement through small gaps. Good testing helps catch problems early when they're easier to fix.
