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How To Measure Storm Door Size?

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You want to know how to measure for a storm door? Grab a tape measure and check your door opening. Accurate numbers matter for a perfect fit. You can handle how to measure for a storm door with just a few basic tools. If the space looks tricky, double-check and ask for help. Even steel door and fire door openings can be measured.


  • Measure the door opening width and height at three points each, then use the smallest width and shortest height for the best fit.

  • Check for obstructions and ensure the mounting surface is flat and wide enough to install the storm door properly.

  • Double-check all measurements and ask for help if needed to avoid mistakes and ensure your new storm door fits perfectly.


how to measure for a storm door

how to measure for a storm door

Hele Doors has helped thousands of homeowners and businesses get the right fit for their storm doors, steel doors, and fire doors. You can trust this guide to walk you through how to measure for a storm door, even if your opening is a little unusual. Let’s break down the process so you can get precise measurements and avoid common mistakes.


Tools Needed

Before you start, gather a few simple tools. You will need:

  • A tape measure (or a laser measure for extra accuracy)

  • Pencil and paper (or your phone) to record numbers

  • A level to check if the doorway is straight

  • Household shims (like paint stir sticks) if you need to adjust the mounting surface

A tape measure works well for most doors, but a laser measure can give you even more precise measurements, especially if you are working alone or have a wide opening. Make sure your tools are easy to read and in good condition.

Tip: Double-check that your tape measure is not bent or stretched. This helps you avoid errors when measuring for a storm door.


Measuring Width and Height

Now, let’s get into how to measure for a storm door. You want to measure the opening width and opening height where the storm door will actually sit. Don’t just measure inside the door jamb—measure inside the brickmold or trim, which is where the storm door mounts.


Step-by-Step Guide:

  1. Measure the Opening Width

    • Take three different measurements for the width: one at the top, one in the middle, and one at the bottom of the door frame.

    • Place your tape measure horizontally from the inside edge of the trim on one side to the inside edge on the other side at each spot.

    • Write down all three numbers.


  2. Measure the Opening Height

    • Measure vertically from the bottom threshold to the top of the frame.

    • Take three measurements: left side, center, and right side.

    • Record each number.


  3. Check the Mounting Surface

    • Make sure you have at least a 1-inch wide and 1-inch deep flat surface for mounting.

    • Look for any obstructions like door handles, mailboxes, lights, or trim that could get in the way.

    • If you see anything unusual, make a note of it.


  4. Level and Adjust

    • Use your level to check if the frame is straight.

    • If the opening is not square, you may need to use shims or consider a custom-sized storm door from Hele Doors.

Common mistakes include not taking three measurements for both width and height, forgetting to check for obstructions, and not using the narrowest or shortest measurement. Always measure where the storm door will be installed, not just inside the jamb.


Recording Measurements

Taking precise measurements is key. Write down each number as you go. Use a notepad or your phone to keep things organized. If you notice any irregularities—like a crooked frame or a mailbox in the way—make a note next to your measurements. This helps you or your installer know what to expect.

  • Always use the narrowest width and the shortest height when ordering your storm door. This ensures a snug fit and prevents drafts, leaks, or trouble opening and closing the door.

  • Double-check your numbers before you order. If you feel unsure, ask a friend to help or reach out to Hele Doors for support.

Hele Doors offers a wide range of storm doors, steel doors, and fire doors. If your opening is not a standard size, you can request a custom solution. The team can help you with measuring for a storm door, so you get the right fit the first time.

Note: Taking precise measurements and checking for obstructions will save you time and money. It also means your new storm door will look great and work perfectly.


door opening size guide

door opening size guide

Standard Sizes

You probably want to know if your door opening matches a standard size. Most storm doors in the United States come in widths from 32 to 36 inches and heights from 74 to 81 inches. These sizes fit most homes and make installation simple. Here’s a quick table to help you see the most common options:

Standard Width (inches)

Standard Height (inches)

32

80

34

80

36

80

36

81

If your opening width or height matches one of these, you’re in luck! You can pick a standard storm door, steel door, or fire door from Hele Doors’ wide selection.


Custom Sizes and Modifications

Sometimes, your doorway just doesn’t fit the usual numbers. Maybe your home is older, or you have a unique entryway. Many people run into this problem. If your opening is much taller, wider, or shaped differently, you might need a custom storm door. Hele Doors can help with custom sizes for those special cases. For small differences, you can often use a standard door and make minor adjustments. If your opening is off by just a little, you usually don’t need a custom door.


Shimming and Obstructions

You might notice things like door handles, mailboxes, or lights near your door. These can get in the way when you install a new storm door. Here’s what you can do:

  • Move or remove anything that blocks the door swing.

  • Use shims to level the frame if your doorway isn’t square.

  • Add or remove trim to help the door fit.

  • Clean the area and check for dirt or damage before you start.

If you have a tricky doorway, Hele Doors offers support and custom solutions. This doorway opening size guide helps you handle both standard and unique situations, so your new door fits perfectly.


right size storm door

Double-Check Measurements

Getting the right size storm door starts with precise measurements. You want your new door to fit perfectly, so take your time and double-check every number. Here’s a simple checklist to help you avoid mistakes:

  1. Measure the width at the top, middle, and bottom of the opening. Write down the smallest number.

  2. Measure the height on the left, center, and right sides. Record the shortest measurement.

  3. Check that the trim is at least 1 inch deep and 3/4 inch wide for proper installation.

  4. Look for anything that could get in the way, like handles or lights.

  5. If your numbers don’t match standard sizes, consider a custom storm door from Hele Doors.

  6. Repeat the whole process to confirm your results.

Tip: Always use the smallest width and height for your order. This ensures your storm door will close smoothly and keep out drafts.


A storm door that doesn’t fit right can cause a lot of problems. You might notice gaps, rattling, or trouble opening and closing the door. Sometimes, insects and dirt sneak in. Drafts can make your home less energy efficient. Repairs rarely fix these issues, so getting the right size storm door from the start saves you time and money.


When to Seek Help

Some doorways are tricky. If you feel unsure about your measurements or the installation, don’t hesitate to ask for help. Professional installers know how to handle complex situations, like custom sizes or unique trim. They make sure your storm door, steel door, or fire door fits perfectly and meets local building codes.

  • Seek help if you have no experience with door framing or code requirements.

  • Call a pro for custom sizing, shimming, or if you spot obstructions.

  • Professionals offer warranties and peace of mind for your installation.


A well-fitted storm door adds security by creating a strong barrier and protecting your main entry. It also helps block drafts, which can lower your utility bills. When you choose Hele Doors, you get expert support and a wide range of options for every scenario.

You can measure for a storm door with these simple steps:

  1. Measure width and height at three points.

  2. Use the narrowest width and shortest height.

  3. Double-check your numbers.

If you have questions, reach out to Hele Doors. A well-fitted storm door, steel door, or fire door brings these benefits:

Benefit

Why It Matters

Energy Efficiency

Keeps drafts out, saves on bills

Security

Adds an extra layer of protection

Curb Appeal

Makes your entry look great

FAQ

How do I know if my storm door will fit with my steel door?

You just need to measure the opening as described. Hele Doors offers storm doors that fit most steel door frames. Custom options are available if needed.


Can I install a storm door if my entryway has a fire door?

Yes! You can add a storm door in front of a fire door. Just check for enough mounting space and follow the measuring steps for a perfect fit.


What if my measurements don’t match standard storm door sizes?

No worries! Hele Doors can make custom storm doors for unique openings. Just share your measurements, and you’ll get a door that fits perfectly.

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