How to Install a New Storm Door in an Old Opening

Installing a new storm door can improve your home’s energy efficiency and add an extra layer of security. This project is manageable for most homeowners with basic DIY skills and can typically be completed in a day.

In this guide, we’ll walk you through the process of installing a new storm door in an existing opening, covering everything from initial measurements to final adjustments. This Old House general contractor Tom Silva demonstrates the key steps for a successful installation in the video above. 

How To Prepare for New Storm Door Installation

Before diving into the installation process, you’ll need to gather a few tools and materials and take measurements.

To install a new storm door, you’ll need the following:

Measure the Door Opening

For success with your installation, you’ll next need accurate measurements.

1. Measure the width of the opening at the top, middle, and bottom.
2. Measure the height from the top of the opening to the threshold.
3. Check if the threshold is level and the sides are plumb.

When selecting your new storm door, use the smallest width and height measurements. Most storm doors are designed to fit standard openings, but custom sizes are available if needed.

How To Install a New Storm Door in an Old Opening

Once you have your tools and measurements, you can start installing your new storm door. Follow these steps.

1. Attach the Hinge Jamb to the Door

The hinge jamb is the vertical piece that attaches to the door and allows it to swing open and closed. Incorrect installation can hinder its movement. Follow the instructions provided by the storm door manufacturer for the proper spacing.

2. Cut the Hinge Jamb to Length

To create the correct length for the hinge jamb and to maintain clearance at the top of the door:

1. Measure from the head jamb down to the sill in the doorway.
2. Subtract 1/4-inch for clearance.
3. Use a sliding T-bevel to transfer the angle of the doorsill onto the lower end of the hinge jamb.
4. Cut the hinge jamb to length using a hacksaw.

3. Place the Door in the Opening

Stand the storm door in the doorway opening and make sure the door is plumb (perfectly vertical) for proper operation. Use a level to check for vertical alignment and adjust as necessary.

4. Secure the Hinge Jamb

Once the door is positioned correctly, screw the hinge jamb to the door trim. Make sure the screws are tight, but don’t over-tighten as this could warp the jamb. 

5. Install the Head Jamb

The head jamb needs to be properly installed for a weathertight seal and smooth operation. 

1. Set the aluminum head jamb on top of the door.
2. Close the door and position the head jamb so it overlaps the top end of the hinge jamb.
3. Screw the head jamb to the trim above the door.

6. Install the Latch-Side Jamb

The latch-side jamb completes the frame of the storm door, and is also necessary for a weathertight seal. 

1. Open the door and slip the latch-side jamb into place.
2. Close the door and adjust the latch-side jamb to create a consistent gap between it and the door edge.
3. Secure the jamb with screws.
4. After installing both the head jamb and the latch-side jamb, open the door and drive screws through the door hinge and into the side jamb for added stability.

7. Prepare the Expander

The bottom expander and weather stripping are also necessary for a tight door seal.

1. Lay the aluminum expander on a work surface with the weather stripping facing up.
2. Use a hammer and slotted screwdriver to slightly deform the aluminum slot.
3. This pinches the slot closed on the weather stripping, preventing it from sliding out.

8. Install the Expander

To install the expander, slip the expander onto the bottom end of the door. Close the door and push the expander down tight against the sill. Then screw the expander to the inside of the door.

9. Install the Striker Plate and Door Closer

To finish installing your new storm door, first screw the striker plate into the side jamb. Then, attach an automatic door closer to the top and bottom of the door for added energy efficiency and security.

10. Add the Screen or Glass Panel

Most storm doors come with interchangeable screens and glass panels. To add these, slide the groove of the panel into the tongue on the door frame. Push into place and secure the handle.

You can easily switch between the screen for ventilation in warmer months and the glass panel for added insulation in colder weather.

Additional Tips for a Seamless Installation

Keep these tips in mind when installing your storm door to make sure it functions as intended:

Double-Check Alignment

Before finalizing the installation, double-check the alignment of all components. Misalignment can cause operational issues and reduce the effectiveness of your storm door. You’ll also want to reassess the door’s plumbness and make sure there are uniform gaps around the door edges.

Seal the Edges

Consider sealing the edges where the storm door meets the existing door frame for extra insulation and to prevent air leaks.

Use weather-resistant caulk on all exterior edges, and apply foam insulation tape if there are noticeable gaps. Make sure all sealing materials are compatible with your door and jamb materials.

Complete a Final Inspection

Before you clean up, look over your work:

• Check all screws and fasteners to make sure they’re tight.
• Confirm the door opens, closes, and latches smoothly.
• Verify the weather stripping is securely attached.

Avoid These Common Mistakes

For a smooth installation process and to prevent potential storm door issues, keep these common mistakes in mind: 

• Over-tightening screws: This could cause the jambs to warp. Screws should be snug but not excessively tight.
• Incorrect measurements: Always double-check measurements before cutting or installing any components. Incorrect measurements can lead to misalignment and compromise the door’s performance.
• Ignoring manufacturer instructions: While these general guidelines are helpful, always refer to the specific instructions provided by the storm door manufacturer. These instructions are tailored to your particular model and can provide important details not covered in general guides.

Troubleshooting Tips

Despite careful preparation, you might encounter some issues during installation. Here are some common problems and how to solve them:

Door Isn’t Closing Properly

If your storm door isn’t closing properly, first check if the hinge jamb is plumb. Then, check if the head jamb and latch-side jamb are correctly aligned. The door’s position may need to be adjusted.

Drafts at the Bottom

If you notice drafts coming in from the bottom of the door, check if the bottom expander is correctly installed and tightly sealed against the sill. Make sure the weather stripping is secure and intact, and consider adding additional insulation or a door sweep.

Difficulty in Switching Panels

If you find it difficult to switch between the screen and glass panels, lubricate the sliding mechanism with a suitable lubricant. Check that the panels are free of debris and not warped, and see if the groove and tongue are correctly aligned.

Our Conclusion

Installing a new storm door in an old opening is a manageable DIY project that can significantly improve your home’s energy efficiency, especially if you opt for a door that comes with energy-efficient features. By following these steps and taking care with measurements and adjustments, you can successfully install a storm door that will serve your home for years to come.