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While technically possible, DIY fire door installation presents significant challenges. Fire doors require precise fitting and specialized sealing to function properly during emergencies. Many jurisdictions require professional installation, especially in commercial or multi-unit residential buildings. If you're considering self-installation, first check local building codes and understand that improper installation could compromise safety and void warranties. For most homeowners, the safety benefits of professional installation outweigh potential cost savings.

Unlike mechanical components with predictable lifespans, fire doors don't have a set expiration date. Their longevity depends largely on maintenance and environmental conditions. Experts recommend inspecting fire doors at least semi-annually for signs of damage or deterioration. 

Watch for issues like damaged seals, loose hardware, or warping. With proper care and regular maintenance, a quality fire door can remain effective for many years, though components like seals and hardware may need periodic replacement.

Fire doors can enhance your home's appeal to safety-conscious buyers, particularly in regions prone to wildfires or in multi-unit buildings. While they may not dramatically increase property value like kitchen renovations might, they represent a tangible safety upgrade that some buyers appreciate. 

Their value contribution is most significant when they're part of a comprehensive fire safety strategy or when they help bring a property into compliance with current building codes. Consider them an investment in both safety and marketability.