Warranty
A contractor's guarantee to repair defects in materials or workmanship for a set period after the project is complete, typically one year, though some materials and equipment carry longer manufacturer warranties of their own.
Why it matters
Construction defects don't always show up on day one: a roof leak might not appear until the first heavy rain, months later. The warranty period is what protects an owner from paying twice for the same work if something the contractor built goes wrong early.
On a real project
Eight months after moving in, an owner notices a door frame that's started to sag. Because it's within the one-year warranty period, the contractor sends a crew back to fix it at no charge, rather than the owner having to pay for the repair themselves.
Who this matters most to
A Project Manager hands over warranty documentation as part of closeout and is often the one fielding the owner's call when a warranty issue comes up later. A Facilities Manager on the owner's side is the one actually tracking which systems are still under warranty years after the contractor is gone.
Where this goes wrong
An owner discovers a leaking pipe fitting fourteen months after moving in, two months past the one-year warranty deadline, and the contractor declines to fix it for free, pointing to the expired warranty period. Whether the underlying installation mistake actually happened well within the warranty year becomes a dispute nobody can easily resolve once the deadline has passed.
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