A door that changes shape during strong afternoon sun deserves a different assessment from one dented by an impact. Thermal bowing can affect bonded insulated sections, but the timing alone does not establish the cause. Stop operation if the door rubs, binds or looks unstable.
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Keep a simple record of the pattern
Note the approximate time, weather and which part of the door changes. If the difference is visible from a safe position, photos at two times of day can be useful. Do not keep cycling the door to prove that it improves when shaded.
Discuss the installed design
DASMA describes temperature differences between the two faces of bonded insulated panels as a cause of thermal bowing. Ask the technician to consider the actual construction and manufacturer guidance. A repair proposal should distinguish thermal movement from loose hardware or permanent damage, and explain how any proposed reinforcement suits the assembly.
Frequently Asked Questions
Does a bowed door always need replacement?
No single observation settles that decision. The section condition, construction, cause and appropriate repair options need assessment.
Should I paint the door a lighter color immediately?
Do not treat paint as a confirmed repair. Review the cause and approved finish requirements before changing the door.