2024-01-05 6 min read
Whether you're replacing an old garage door or installing one in new construction, accurate measurements are crucial for a proper fit. This guide will walk you through everything you need to know about measuring for a garage door.
An improperly sized garage door causes numerous problems:
- Gaps that let in weather, pests, and intruders, Binding or rubbing against the frame, Premature wear on components, Safety hazards, Void warranties
Before starting, gather these items:
- Tape measure (25 feet recommended) - Step ladder, Notepad and pen, Level, Flashlight
Measure the width of the garage door opening at the widest point:
- Measure at floor level, Measure at the middle of the opening, Measure at the top, Use the largest measurement
Standard widths: 8', 9', 10', 12', 16', 18' (single and double doors)
Measure the height from the floor to the header:
- Measure on both sides, Measure in the center, Use the smallest measurement
Standard heights: 7', 8' (most common residential sizes)
This is the space between the door opening and the side walls:
- Measure from each side of the opening to the nearest obstruction, Minimum required: 3.75" - 5.5" depending on track type
The space between the top of the door opening and the ceiling:
- Measure from the header to the ceiling or lowest obstruction, Minimum required: 10" - 15" depending on opener type, Low-headroom tracks available for tight spaces
How far back the door extends when open:
- Measure from the header into the garage, Should equal door height plus 18" minimum, More depth needed for high-lift or vertical-lift configurations
If replacing an existing door:
- Measure the actual door, not just the opening, Note the door's thickness, Check if current tracks are standard or special
Many garage floors slope for drainage:
- Measure height at multiple points, Note the slope direction, Bottom weather seal can accommodate minor variations
Document anything that might interfere with installation:
- Light fixtures, Pipes or ductwork, Electrical panels, Water heaters, Storage shelves
While taking preliminary measurements yourself is helpful, we always recommend a professional measurement before ordering. Our free in-home estimates include:
- Precision measurements with professional tools, Assessment of structural conditions, Recommendations for track configurations, Discussion of door style options, Written quote with no hidden fees
Contact Garage Door Wilmot at 1-330-977-5095 for a free measurement and estimate. Our experts will ensure you get the perfect fit for your new garage door.