How to Seal Doors for Winter: A Guide for Commercial Spaces

As winter approaches, ensuring that your commercial property is properly insulated is crucial for maintaining a comfortable environment and reducing energy costs. One of the key areas that often let in cold air is around doors. Sealing commercial doors for winter is an effective way to keep the cold out and the heat in. Here’s a detailed guide on how to seal your commercial doors to make your business more energy-efficient and comfortable.

Why Sealing Commercial Doors is Important

Before diving into the how-to, it’s essential to understand why sealing commercial doors is important. Poorly sealed doors can lead to drafts, making your heating system work harder to maintain a comfortable temperature. 

This not only increases your energy bills but also puts unnecessary strain on your heating system. By properly sealing your commercial doors, you can improve your building’s energy efficiency, reduce your heating costs, and create a more comfortable environment for employees and customers.

Materials Needed

To seal your commercial doors effectively, you will need the following materials:

• Heavy-duty weatherstripping

• Commercial-grade door sweep

• Caulk and caulking gun

• Butyl tape

• Utility knife or scissors

• Measuring tape

• Screwdriver

• Cleaning supplies (soap, water, and a cloth)

Step-by-Step Guide to Sealing Commercial Doors

1. Inspect Your Doors

Start by inspecting your commercial doors for any gaps or cracks. Pay close attention to the areas around the door frame and threshold. Use a flashlight to see if any light passes through the edges of the door; this indicates where cold air might be entering.

2. Clean the Door and Frame

Before applying any sealing materials, clean the door and frame thoroughly. Use soap and water to remove any dirt, dust, or debris. Ensure the surfaces are dry before proceeding.

3. Apply Heavy-Duty Weatherstripping

Weatherstripping is an effective way to seal the gaps around the door frame. There are various types of weatherstripping materials available, such as adhesive-backed foam, felt, or V-strip. Here’s how to apply it:

• Measure the perimeter of the door frame to determine the length of weatherstripping needed.

• Cut the weatherstripping to the required length using a utility knife or scissors.

• Peel off the adhesive backing and press the weatherstripping firmly along the door frame, ensuring it creates a tight seal when the door is closed.

4. Install a Commercial-Grade Door Sweep

A commercial-grade door sweep is a strip of rubber or brush-like bristles that attach to the bottom of the door to seal the gap between the door and the threshold. To install a door sweep:

• Measure the width of the door.

• Cut the door sweep to fit the width using a utility knife or scissors.

• Attach the door sweep to the bottom of the door using screws or adhesive, depending on the type of sweep. Ensure it makes contact with the threshold but does not hinder the door’s movement.

5. Use Caulk to Seal Cracks

For any cracks or gaps around the door frame, use caulk to seal them. Choose a caulk suitable for your door material (metal, wood, etc.). Here’s how to apply it:

• Cut the tip of the caulk tube at a 45-degree angle.

• Load the tube into a caulking gun.

• Apply a continuous bead of caulk along the cracks or gaps.

• Smooth the caulk with a caulking tool or your finger to ensure it fills the gap completely.

6. Add Butyl Tape for Extra Insulation

Butyl tape is another option for sealing smaller gaps and can be used in conjunction with weatherstripping. To apply butyl tape:

• Measure the length of the door frame where additional sealing is needed.

• Cut the tape to the required length.

• Peel off the adhesive backing and press the tape firmly along the desired area.

Final Checks

After sealing your doors, close them to check for any remaining drafts. Make any necessary adjustments to ensure a tight seal. Remember to check your door seals periodically throughout the winter and replace any materials that have become worn or damaged.

Conclusion

Sealing commercial doors for winter is a simple and cost-effective way to improve your building’s energy efficiency and comfort. By following these steps and using the appropriate materials, you can keep the cold air out and the warmth in, ensuring a cozy environment for your business all winter long. 

By taking the time to properly seal your commercial doors, you can enjoy a warmer building and lower energy bills throughout the winter months.  For more information about how to seal doors for winter or help ordering sealing material, Contact Us Today! The WRS Team looks forward to assisting you. Happy sealing!