Identify the door as well as the symptom
If the property has more than one garage opening, say which door changed and whether the other still behaves normally. Do not compare spring hardware by touching or moving it. Each assembly needs its own identification, even when the doors look alike from the driveway.
Disclose alterations affecting the load
Added finish material or replacement sections may change the weight the spring system supports. Include that history in the request. The quote should explain compatible spring work and any related components rather than selecting a spring from paint marks or apparent size.
Preserve the property project record
Key Biscayne's official building portal provides a separate route for property and project information. If the findings lead to a covered replacement or alteration, confirm its current requirements and keep that decision apart from the spring repair. Do not infer municipal approval from an old service invoice.
Your questions
Can the other garage door's spring be used as the specification?
Not solely because the doors appear similar. Construction and configuration can differ between openings.
Is manually lifting the damaged door a useful test?
Do not attempt it with a suspected spring fault. Leave the door unused and describe the access problem.
