A Guide to Contracting Warranties: What You Need to Know

A Guide to Contracting Warranties: What You Need to Know

5 min13 July 2026Planning & Cost

Many clients hear the word "warranty" without confirming its actual details. A real warranty should be written, with a clear scope and duration — not just a general verbal promise. This guide outlines what to look for.

Types of warranties in contracting projects

  • Material warranty: covers manufacturing defects in the material itself (like a defect in a sandwich panel sheet).
  • Installation warranty: covers execution defects (like a leak caused by poor installation).
  • Comprehensive warranty: covers both material and installation together under one party's responsibility.

What a warranty should clarify in writing

  • The exact warranty duration (months or years).
  • Exactly what it covers, and what's excluded (like misuse or natural disasters).
  • The claims process: how you reach out when there's an issue, and the expected response time.
  • Is the warranty transferable if you sell the property later?

Why a comprehensive warranty from one party is stronger

When a warranty is split between the manufacturer and the contractor, you may face responsibility being passed back and forth when an issue arises. A comprehensive warranty from one party responsible for supply and installation together removes this risk entirely.

Before signing: request the warranty in writing

Don't settle for a verbal promise no matter how trustworthy the contractor seems; ask for the full warranty details documented within the contract itself before signing and paying.

Note: prices in this article are indicative and vary with specification, quantity and site conditions. For an exact figure for your project, request a free quote.

Frequently asked questions

Does the warranty cover misuse on my part?+

No, a warranty usually covers manufacturing and installation defects only, and doesn't cover damage from misuse or neglecting basic maintenance.

What if an issue appears after the warranty period ends?+

You can request paid maintenance or repair after the warranty ends; routine maintenance during and after the warranty period reduces the likelihood of such issues.

Can the warranty be extended for an extra fee?+

It varies by each contractor's policy and project type; ask about this option at contract time if it matters to you.

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