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No, there should not be a gap between your garage door and the floor. Gaps can make your garage less energy efficient, leading to higher energy bills. They also create an entry point for pests like rodents and insects, as well as rain and melted snow, which can lead to foundation damage or mold issues.

If you have a gap under your garage door, potential causes include an uneven garage floor or worn-out weather stripping. To fix it, you can try several solutions:

• Replace the weather stripping: The seal at the bottom of the door may need to be replaced.

• Adjust the garage door: You may be able to adjust the closing position on your garage door opener to eliminate the gap.

• Inspect the floor: If the concrete floor has shifted or is uneven, it may need to be repaired to create a level surface.

If these solutions do not resolve the issue, it is best to call a garage door repair specialist to inspect the door and floor.

The most affordable way to insulate a garage involves choosing cost-effective materials like fiberglass, which comes in batts or rolls and is relatively easy to install. You can often install this type of insulation without needing to add drywall, which helps reduce costs. While a DIY approach might seem cheapest, hiring a professional installer can be highly cost-effective. Experts can accurately determine your garage's specific insulation needs and ensure the best results for your investment, often using batt insulation for the bulk of the project.

You do not need to drywall over most types of garage insulation. However, doing so can increase noise reduction, make the space more attractive, and keep children and pets from touching harmful fiberglass insulation. If you’re using cellulose or some other type of blown-in insulation (fiberglass and mineral wool are common), you will need drywall to contain the insulation material.

If your garage door seems to freeze every winter, you can try rubbing silicone spray or petroleum jelly around the edges and rollers of the garage door. However, it’s a good idea to avoid direct application of silicone sprays like WD40 to rubber edges, which could damage them over time. A garage door that frequently freezes shut could need a full replacement, especially if it’s showing signs of rust or other wear and tear.