Do Metal Doors Swell? The Truth Revealed

Many homeowners have experienced the frustration of a metal door that seems to have suddenly swelled, making it difficult to close or open properly. But do metal doors actually swell, or is there another explanation for this common issue?

In this article, we will explore the truth behind the phenomenon of metal doors swelling. We will delve into the factors that can cause metal doors to appear swollen, including changes in temperature, humidity, and improper installation. By understanding the root causes of this problem, you can take steps to prevent it from happening in the future.

Understanding Metal Door Construction

When it comes to metal doors, understanding their construction is essential to knowing how they may or may not swell. Metal doors are typically made with a core material, such as polyurethane or polystyrene, sandwiched between two layers of metal. The type and thickness of the metal used in the construction can vary depending on the intended use of the door.

Core Material

The core material of a metal door is crucial in determining its strength, insulation properties, and resistance to swelling. Polyurethane is a common choice for its high insulation value and ability to resist moisture absorption, while polystyrene is lighter and less expensive but may not provide as much insulation.

Overall, understanding the construction of metal doors can help you choose the right one for your needs and better understand how they might react to changes in temperature and humidity.

Factors That Can Cause Metal Doors to Swell

1. Humidity Levels: High levels of humidity can cause metal doors to swell as moisture is absorbed into the metal, leading to expansion. It is important to monitor the humidity levels in your environment to prevent this issue.

2. Water Exposure: Direct exposure to water, such as rain or constant contact with water from sprinkler systems, can also cause metal doors to swell. Make sure to protect your metal doors from excessive water exposure to prevent swelling.

3. Poor Installation: Improper installation of metal doors can lead to gaps or cracks where moisture can seep in, causing swelling over time. Ensure that your metal doors are properly installed by experienced professionals to avoid this issue.

Effects of Swelling on Metal Doors

Swelling in metal doors can lead to issues such as decreased efficiency in opening and closing the door, increased friction, and potential damage to the door frame or surrounding areas. The expansion of the metal due to swelling may cause the door to become misaligned, making it difficult to properly close and latch. In extreme cases, swelling can even result in the bending or warping of the door, compromising its structural integrity and security.

Preventative Measures to Avoid Swelling

Here are some key preventative measures to avoid swelling of metal doors:

1. Proper Installation

Ensure that metal doors are properly installed by professionals to prevent any gaps or uneven fitting that could lead to moisture seeping in and causing swelling.

2. Regular Maintenance

Regularly inspect metal doors for any signs of wear and tear, especially around the edges and corners where swelling is most likely to occur. Repair any damage promptly to prevent further swelling.

3. Weather Stripping Installation Install weather stripping around the perimeter of the metal door to create a tight seal and prevent moisture from getting in.
4. Proper Ventilation Ensure proper ventilation in the room where the metal door is located to reduce humidity levels and prevent moisture buildup.

Signs That Your Metal Door Is Swelling

1. Difficulty opening or closing the door.

2. Unusual gaps or spaces between the door and the frame.

3. Increased friction or resistance when trying to open or close the door.

4. Warping or bending of the metal material.

5. Changes in the alignment of the hinges or locks.

How Swelling Can Impact Door Functionality

When a metal door swells due to exposure to moisture or humidity, it can have a significant impact on its functionality. The increased size of the door can cause it to stick against the door frame, making it difficult to open and close smoothly.

This swelling can also lead to gaps or misalignment between the door and the frame, allowing drafts, noise, and even pests to enter the building. In severe cases, the excessive swelling can cause the door to become completely stuck or warped, requiring costly repairs or replacement.

Overall, swelling in metal doors can disrupt the secure and efficient operation of the door, compromising the safety, insulation, and aesthetics of the building.

Common Misconceptions About Metal Doors Swelling

There are several common misconceptions about metal doors swelling that need to be debunked:

1. Metal doors do not swell like wood doors. Unlike wood doors, metal doors do not absorb moisture and therefore do not swell. Any changes in the size or shape of a metal door are typically due to issues with the frame or installation, not the door itself.

2. Humidity does not cause metal doors to swell. While humidity can affect metal doors in terms of corrosion or rust, it does not cause them to swell. Metal doors are typically resistant to moisture and do not expand or contract in response to changes in humidity.

3. Warping is not the same as swelling. Warping is a deformation that can occur in metal doors due to factors like temperature changes or improper installation. While warping may give the appearance of swelling, it is a distinct issue that requires different solutions.

4. Proper maintenance can prevent perceived swelling. Regular maintenance, such as keeping hinges lubricated and ensuring proper weather stripping, can help prevent issues with metal doors that may be mistakenly attributed to swelling. By addressing these maintenance tasks, you can keep your metal doors functioning smoothly without worrying about swelling.

Professional Solutions for Dealing with Swollen Metal Doors

If you have a metal door that has swelled, there are several professional solutions that you can consider:

  • First, determine the cause of the swelling. Sometimes, moisture or humidity can cause metal doors to swell. Addressing the root issue can prevent future swelling.
  • One option is to sand down the swollen areas of the metal door to reduce the swelling. Be sure to use a fine-grit sandpaper and work slowly to avoid damaging the door.
  • Applying a lubricant, such as WD-40, to the swollen areas can help reduce friction and make it easier to open and close the door.
  • If the swelling is severe, you may need to contact a professional to repair or replace the metal door. A professional can assess the damage and recommend the best course of action.
  • Regular maintenance of metal doors, such as painting or sealing, can help prevent swelling in the future.

DIY Tips for Treating Swollen Metal Doors

If you’re dealing with a swollen metal door, here are some DIY tips to help you address the issue:

1. Identify the Cause

Before attempting to fix a swollen metal door, it’s important to identify the cause of the swelling. This could be due to factors such as humidity, water damage, or improper installation.

2. Remove Excess Moisture

To treat a swollen metal door, start by removing excess moisture with a towel or sponge. Be sure to dry the affected area thoroughly to prevent further swelling.

  • Use a dehumidifier in the room to reduce humidity levels.
  • Avoid placing wet items near the door to prevent further damage.

By following these DIY tips, you can effectively treat a swollen metal door and prevent further damage. Remember to address the cause of the swelling to prevent future issues.