Does seal failure count as a manufacturer defect for warranty purposes?

Seal failure can count as a manufacturer defect for warranty purposes, but it depends on the specific warranty terms and the age of the windows. Most quality window manufacturers will cover seal failure under warranty if it occurs within the specified timeframe and meets their criteria.

Manufacturer warranties typically cover seal failure when it results in permanent fogging or condensation between glass panes that cannot be cleared. This is considered a defect in the insulated glass unit (IGU) construction. However, warranties usually specify that the seal failure must be visible and affect the window's performance or appearance - minor condensation that clears up doesn't typically qualify.

The warranty coverage period varies significantly between manufacturers and product lines. Standard warranties might cover seal failure for 10-15 years, while premium windows often include 20-year or even lifetime seal warranties. Some manufacturers offer prorated coverage, meaning they'll cover a percentage of replacement costs based on the window's age.

In Ottawa's climate, seal failure is more common due to extreme temperature fluctuations that stress the seals over time. Quality manufacturers understand this and typically honor legitimate seal failure claims. However, damage from improper installation, structural settling, or impact damage usually voids warranty coverage.

To make a warranty claim, you'll need proof of purchase, installation date, and clear documentation of the seal failure. Take photos showing the permanent fogging between panes. The manufacturer may require inspection by an authorized dealer or installer to verify the defect and determine if it's covered under warranty terms.

For questions about your specific window warranty coverage, check your original warranty documentation or contact the manufacturer directly with your model and purchase information.

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