Measure Three Times

Measure Three Times

Measure width and height in multiple locations and use the smallest measurement.
Check Jamb Depth

Check Jamb Depth

Ensure your frame depth matches your wall thickness.
Confirm Door Swing

Confirm Door Swing

Verify left-hand, right-hand, inswing, or outswing orientation.
Double-Check Everything

Double-Check Everything

Review all measurements before ordering to avoid delays and additional costs.

Important Measurement Tips

Measure Accurately

Measure Accurately

Always measure in inches using a metal tape measure.

Inside Mount

Inside Mount

Measure the inside of the opening in three places and use the smallest measurement.

Outside Mount

Outside Mount

Measure the outside opening and add the required overlap for proper coverage.

Check for Obstructions

Check for Obstructions

Look for handles, locks, trim, blinds, or other items that could affect installation.

Frequently Asked Questions

What measurements do I need before shopping for a replacement door? +
Measure the width and height of the existing door, the jamb depth, and, when possible, the rough opening. You should also determine the door swing and whether you need a single or double door.
What is a rough opening? +
The rough opening is the framed opening in the wall before the door unit is installed. It is typically slightly larger than the door unit to allow room for installation and adjustment.
What is jamb depth, and why does it matter? +
Jamb depth is the width of the door frame from the interior side of the wall to the exterior side. Choosing the correct jamb depth helps the frame fit properly with your finished wall.
How do I determine whether my door is left-hand or right-hand? +
Door handing depends on the location of the hinges and the direction the door swings. Use the door swing diagram in the measuring guide above to help identify the correct configuration.
Should I measure the door slab or the entire frame? +
If you're replacing only the door slab, measure the existing slab. If you're replacing the complete door unit, measurements of the frame and rough opening are more useful. When in doubt, bring us all of your measurements.
Should I measure in more than one place? +
Yes. Measure the width at the top, middle, and bottom and the height on both sides. Openings aren't always perfectly square, especially in older homes. Write down any differences you find.
What if my measurements don't match a standard door size? +
That's okay. Older homes, renovations, and custom openings don't always match today's standard sizes. Bring your measurements and photos with you, and we can help determine which available options may work for your opening.
What measurements do I need for a replacement window? +
Measure both the width and height of the opening in multiple places. Depending on the type of replacement window, additional measurements may also be necessary.
Where should I measure the width of a window? +
Measure horizontally across the opening at the top, middle, and bottom. Record each measurement rather than assuming the opening is perfectly square.
Where should I measure the height? +
Measure vertically on the left, center, and right sides of the opening and record all three measurements.
Why should I take multiple measurements? +
Window openings can shift or become slightly uneven over time. Measuring in several places helps identify differences that could affect whether a particular window will fit.
What should I bring with me when shopping for a window? +
Bring all of your measurements along with photos of the existing window and opening. Photos from both the inside and outside can help our team better understand what you're replacing.
Not sure about your measurements? Bring your measurements and photos of the existing opening to our showroom and our team can help you compare them with available options. Always confirm final measurements and installation requirements before purchase.