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Frequently Asked Questions
Get answers to common questions about our garage door services.
Our rapid response team can typically address sensor issues within 24 hours of your call. For emergency situations, we offer same-day service and are available 24/7.
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Size Measurement Guide: What Every Homeowner Should Know
2024-01-05 6 min read
# Size Measurement Guide: What Every Homeowner Should Know
Whether you're replacing an existing garage door or installing one in new construction, accurate measurements are essential. The wrong size door means delays, additional costs, and potentially compromised security. At Turkey Garage Doors, we always verify measurements before ordering, but understanding how to measure helps you get accurate quotes and plan your project effectively.
Why Accurate Measurements Matter
Garage doors aren't one-size-fits-all. Standard sizes exist, but many homes.especially older ones.have non-standard openings. Here's why getting it right matters:
- Custom doors cost more: Non-standard sizes may require special ordering
- Installation problems: Wrong sizes mean modifications to tracks, framing, or the door itself
- Appearance issues: Gaps or tight fits look unprofessional
- Safety concerns: Improper fits can create security vulnerabilities
- Warranty implications: Incorrectly installed doors may void warranties
Tools You'll Need
Before measuring, gather these items:
- 25-foot tape measure (minimum)
- Stepladder, Pen and paper or smartphone for notes, Level (helpful but not essential)
- Flashlight (for viewing overhead areas)
The Essential Measurements
1. Opening Width
Measure the width of the garage door opening at its widest point:
1. Measure at floor level from inside edge to inside edge of the door jamb
2. Measure again at the midpoint (about 4 feet high)
3. Measure at the top of the opening
4. Record the smallest measurement
Standard residential garage door widths are 8, 9, 10, 12, 14, 16, and 18 feet. If your measurement falls between standards, you'll need a custom door or jamb modifications.
2. Opening Height
Measure the height of the opening:
1. On the left side, measure from floor to the bottom of the header
2. Repeat on the right side
3. Measure in the center
4. Use the smallest measurement
Standard heights are 7 feet (84 inches) and 8 feet (96 inches). Some doors come in 6'6" and other custom heights.
3. Side Room (Side Clearance)
This is the space between the door opening and the nearest obstruction on each side:
1. Measure from the edge of the opening to the side wall
2. Measure on both sides
3. Note any obstacles (pipes, electrical panels, shelving)
Most standard-lift garage doors require 3.75 to 4 inches of side room, though some systems need more.
4. Headroom
This is the space between the top of the door opening and the ceiling or nearest obstruction:
1. Measure from the top of the door opening straight up to the ceiling
2. Note the distance to any obstructions (lights, pipes, HVAC ducts)
Standard headroom requirements:
- Standard lift: 10-12 inches minimum, Low headroom systems: 4.5-6 inches, High lift: Varies by design
If your headroom is limited, special hardware may be needed.
5. Backroom (Depth)
This is how far the door will extend into the garage when open:
1. Measure from the inside of the door opening to the back wall
2. Measure at ceiling height
Backroom should be at least equal to the door height plus 18 inches for standard torsion spring systems.
Special Situations
Existing Door Replacement
If you're replacing an existing door:
1. Measure the current door as well as the opening
2. Check if the existing door is standard size
3. Note the track system currently installed
4. Document any modifications that were made
New Construction
For new builds:
1. Verify rough opening dimensions with your contractor
2. Confirm header and jamb placement
3. Discuss any ceiling obstructions planned for the space
4. Consider future needs (RV storage, workshop equipment)
Uneven Floors
Garages often have sloped floors for drainage:
1. Measure door width at multiple heights
2. Note the amount of slope
3. Consider bottom seal options for uneven surfaces
4. Discuss grade variations with your installer
Common Measurement Mistakes
Avoid these frequent errors:
Measuring the old door, not the opening: The existing door may not be the correct size or may have been modified.
Ignoring obstructions: That light fixture or pipe may need to be moved.
Forgetting vehicle clearance: Make sure your vehicles fit through the opening with the door at its narrowest point.
Not accounting for weatherstripping: This adds to the overall door dimensions.
Assuming level floors and plumb walls: Always take multiple measurements.
What to Do With Your Measurements
Once you have accurate measurements:
1. Compare to standard door sizes
2. Note any special requirements (low headroom, side-mount opener)
3. Request quotes from installers
4. Ask about options if your opening is non-standard
When to Call a Professional
Consider professional measurement if:
- Your opening appears non-standard, There are significant obstructions, The floor is very uneven, You're uncertain about any measurement, The project involves structural changes
At Turkey Garage Doors, we provide free on-site measurements as part of our estimate process. Our experienced technicians will verify all dimensions and recommend the best solution for your specific situation.
Cost Implications of Door Sizes
Understanding how size affects price helps you budget:
- Standard sizes: Most economical, readily available
- Custom widths: 10-20% premium over standard
- Custom heights: Similar premium to custom widths
- Fully custom: Can be 30-50% more than standard
Conclusion
Accurate measurements are the foundation of a successful garage door project. While our team will always verify measurements before installation, having this information helps you get accurate quotes and understand your options.
Ready to start your project? Call Turkey Garage Doors at 1-910-991-2164 for a free on-site estimate. We'll handle all the measurements and help you choose the perfect door for your home.
