The absence of a step-up between the garage floor and the interior of your home can create safety, structural, and code compliance issues. A proper step-up provides a critical barrier against moisture, gas infiltration, and vehicle intrusion while meeting building code requirements.

1. Prevents Water and Gas Infiltration

• Elevating the interior floor above the garage floor prevents water, oil, and fumes from seeping into living spaces.

2. Enhances Safety

• A step-up reduces the risk of accidental vehicle contact with interior walls or doors.

3. Meets Building Codes

• Many building codes require a minimum step-up (typically 4 inches) between the garage and interior to prevent vehicle exhaust gases like carbon monoxide from entering the home.

4. Protects Interior Floors

• Keeps dirt, debris, and liquids from easily transferring from the garage to the interior.

1. Height of the Step-Up

• Most codes require at least a 4-inch step-up between the garage and the interior door.

2. Slope of the Garage Floor

• The garage floor must slope toward the exterior to direct water away from the home.

3. Sealed Threshold

• The door threshold and step must be sealed to prevent air and moisture infiltration.

1. Inspect the Current Setup

• Determine the level difference (or lack thereof) between the garage floor and the interior door.

• Check for potential water drainage issues in the garage.

2. Plan the Step-Up Design

• Decide whether to pour a raised concrete platform, install a prefabricated riser, or modify the existing interior threshold.

• Ensure the design allows for smooth and safe access.

3. Build a Concrete Platform (Recommended)

• Prepare the Area: Clean the garage floor and remove debris where the platform will be installed.

• Create a Form: Use wooden boards to create a form for the concrete step-up, ensuring it is at least 4 inches high and extends several inches into the garage.

• Pour the Concrete: Mix and pour concrete into the form, smooth it with a trowel, and allow it to cure according to manufacturer instructions.

• Seal the Platform: Apply a concrete sealer to protect against moisture and wear.

4. Install a Prefabricated Riser (Alternative Option)

• Purchase a prefabricated riser or step designed for garages.

• Secure it in place with screws or adhesive, ensuring stability and proper alignment.

5. Modify the Door Threshold

• Install a raised door threshold that seals the gap and provides a step-up effect.

• Add weatherstripping to enhance the seal against air and moisture.

• Measuring tape

• Concrete mix and trowel (for concrete step-up)

• Wooden boards (for concrete form)

• Prefabricated riser (if opting for this solution)

• Screws or adhesive (for securing the riser)

• Door threshold and weatherstripping

• Level and safety gear

1. Ensure Proper Drainage

• Verify that the garage floor slopes away from the house to prevent water from pooling near the step.

2. Maintain the Step-Up

• Regularly inspect the step for cracks, wear, or damage and repair as needed.

3. Seal the Garage Floor

• Apply a water-resistant sealant to the garage floor and step to reduce moisture infiltration.

• Structural Modifications: If significant alterations to the garage floor or interior are needed, hire a licensed contractor.

• Code Compliance: Consult a professional to ensure the step-up meets local building codes and safety requirements.

• Water Drainage Issues: For garages with poor drainage, a contractor can re-slope the floor or install a drainage system.

• Improved Safety: Prevents water, gas, and debris from entering the home.

• Code Compliance: Meets legal requirements for garage-to-interior transitions.

• Enhanced Durability: Protects interior flooring and walls from garage-related wear and tear.

By adding a proper step-up between your garage and the interior of your home, you enhance safety, protect your living spaces, and ensure compliance with building standards. Regular inspections and maintenance will help preserve its effectiveness for years to come.