In Plain English
Quick Answer
The contractor's promise to fix any defects in their work for a specified period after the project is complete.
Definition
Definition
A construction warranty is the contractor's guarantee that the work will be free from defects in materials and workmanship for a specified period after substantial completion. The standard AIA warranty period is one year, though longer warranties may apply for specific systems or equipment. The contractor is obligated to repair or replace defective work discovered during the warranty period at no cost to the owner.
Context
Why It Matters in Bidding
Warranty obligations are a real cost that estimators must price into a bid, because the contractor carries the risk and labor of return visits, callbacks, and repairs for the entire warranty period after the project closes out. Extended or manufacturer-backed warranties (common on roofing, HVAC, and waterproofing) often require certified installers or specific products, which can raise subcontractor pricing and limit who can bid. Warranty terms also affect cash flow, since retainage and final payment frequently hinge on delivering required warranty documentation at closeout.
Example
Example
Because the spec required a 20-year manufacturer no-dollar-limit roofing warranty, only certified applicators could bid the roofing scope, and the winning contractor priced in two warranty inspection visits during the first year of its own one-year correction-of-work obligation.
See Also
Related Terms
FAQ
Questions Contractors Ask
What is the difference between a contractor warranty and a manufacturer warranty?
A contractor warranty covers workmanship and installation. A manufacturer warranty covers the product itself, often for far longer, such as 10 to 30 years on roofing membranes. The two can overlap, and many specs require both, so estimators must price labor for callbacks separately from the material coverage the manufacturer provides.
How does the warranty period affect a contractor's bid pricing?
Longer or specialized warranties increase a contractor's exposure to future callback labor, travel, and repair costs, so estimators build a contingency or warranty reserve into overhead. Warranties that require certified installers or premium products also raise subcontractor quotes, which flows straight into the bid price and can narrow the field of eligible bidders.
When does the construction warranty period start?
Most warranties begin at substantial completion, the point when the owner can occupy and use the work, not at final completion or final payment. Under AIA A201, this date also starts the one-year correction-of-work period during which the contractor must fix defective work on notice. Contractors confirm the date because a misread extends obligations.
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