Applying construction warranty best practices consistently across every project is what separates GCs who lose money on warranty claims from those who manage them profitably. The Construction Industry Institute found that GCs with documented warranty programs spend 35% less on post-completion repairs than those without formal processes.

This checklist gives you a structured approach to warranty management from preconstruction through the end of the warranty period. Use it as a risk management reference for every project.

Pre-Construction Warranty Checklist

Before the first trade mobilizes, your warranty framework should already be in place. These items set the foundation.

Review the owner contract warranty provisions and map every obligation to a subcontractor scope. Identify any warranty periods that exceed your standard 12-month term. Flag specialty systems (roofing, waterproofing, elevators) that carry extended warranties.

Draft subcontract warranty language that extends 6 months beyond your owner warranty. Include measurable performance standards for every warranted system. Specify the claim notification procedure, response timelines, and remediation deadlines.

Require manufacturer warranty registration as a condition of subcontractor payment. Verify that manufacturer installation requirements match your specifications. Document any deviations in writing before work begins.

Pre-Construction Item	Responsible Party	Deadline	Verification Method
Owner warranty terms reviewed	Project Manager	Before sub buyout	Checklist sign-off
Sub warranty language finalized	PM + Legal	Before sub execution	Legal review letter
Manufacturer warranty requirements collected	PM + Subs	Before mobilization	Spec compliance matrix
Warranty tracking system set up	PM + Admin	Before mobilization	System screenshot
Warranty bond requirements issued	PM	Before sub execution	Bond confirmation
Extended warranty trades identified	PM	Before sub buyout	Trade list memo

During-Construction Warranty Checklist

Active construction is where warranty protection is built or lost. Quality control during installation prevents warranty claims after turnover.

Conduct installation inspections at defined milestones for every trade. Document inspection results with photos, measurements, and inspector sign-offs. Issue non-conformance reports for any work that deviates from specifications.

Track manufacturer installation requirements in real time. If a membrane manufacturer requires application above 40 degrees, verify temperature logs for every installation day. This documentation becomes your defense if the manufacturer denies a warranty claim later.

Maintain a running punch list throughout construction, not just at the end. Early deficiency identification gives subcontractors time to correct work while they are still mobilized on site.

Substantial Completion Warranty Checklist

The 30-day window around substantial completion is the most critical period for warranty management. Get this right and you prevent 60% of post-completion disputes.

Conduct a comprehensive pre-warranty inspection of every system and finish. Document every deficiency with photos, location, responsible trade, and severity rating. Require subcontractor sign-off on the deficiency list.

Collect all manufacturer warranty certificates before issuing substantial completion. Verify that product serial numbers on certificates match installed products. File warranties by system and trade for easy retrieval.

Record the warranty start date for each trade or system. Confirm that the warranty start date in your tracking system matches the contractual definition. Set automated alerts for 30, 60, and 90 days before each warranty expires.

Post-Completion Warranty Administration Checklist

The 12-24 months after turnover require active management, not passive waiting. Set the tone early with the owner by providing a warranty manual and single point of contact.

Deliver a warranty manual to the owner within 30 days of substantial completion. Include all manufacturer warranties, subcontractor contact information, maintenance requirements, and the warranty claim submission procedure.

Respond to warranty claims within 24 hours of receipt. Conduct site visits within 5 business days. Provide a written remediation plan within 10 business days. Complete non-emergency repairs within 30 days.

Track all warranty claims in a central database. Record the date received, trade responsible, root cause, repair cost, and resolution time. Review this data quarterly to identify recurring issues.

11-Month Warranty Walk Checklist

Schedule an 11-month warranty walk with the owner 30 days before the general warranty expires. This proactive step demonstrates commitment and catches defects before your subcontractors' extended warranties expire.

Walk every space with the owner and a representative from your team. Document all findings on a standardized form. Distribute deficiency items to responsible subcontractors within 48 hours of the walk.

Set a 30-day remediation deadline for all items identified during the 11-month walk. Follow up weekly until all items are closed. Obtain owner sign-off on completion of warranty items.

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FAQs

What should a construction warranty manual include? Include all manufacturer warranty certificates, subcontractor warranty terms, emergency contact information, maintenance schedules, system operating manuals, and the warranty claim submission procedure. Organize by building system for easy reference.

How often should GCs review warranty claims during the warranty period? Review warranty claims monthly for the first 6 months and quarterly after that. Monthly reviews during the early period catch emerging patterns before they become expensive problems.

Should GCs conduct warranty walks at intervals other than 11 months? Yes. Conduct a 6-month warranty walk for projects with complex MEP systems. This catches performance issues during the first heating or cooling season. The 11-month walk is the minimum standard.

What documentation should GCs keep after the warranty period ends? Retain all warranty documentation for the statute of repose period in your jurisdiction, which ranges from 4 to 15 years depending on the state. Digital storage makes this practical and low-cost.

How do GCs handle warranty claims for trades with expired sub warranties? If the sub's warranty has expired but your owner warranty is still active, the GC bears the remediation cost. This is why sub warranties should extend 6 months beyond the owner warranty. Without that buffer, the GC absorbs the risk.

Can warranty obligations be insured? Yes. Warranty and latent defect insurance policies are available from specialty carriers. Premiums range from 0.5-2% of the contract value. These policies cover warranty repair costs for defects discovered after completion, up to policy limits.

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