Homeowner Guide

What Warranty Coverage Should I Expect for New Windows?

A new window warranty should do more than sound impressive on paper. Homeowners need to understand what is covered, who stands behind it, and whether the company installing the windows is properly set up to honour that promise later. From manufacturer coverage to workmanship protection, here is what you should expect before moving ahead with a window replacement project.

Bow window installation by Great Northern Home Exteriors

There Are Usually Two Different Window Warranties

One of the biggest points of confusion for homeowners is that window warranty coverage is usually split into two separate parts: the manufacturer warranty on the product itself and the workmanship warranty on the installation.

Manufacturer Warranty

This covers the actual window product. For example, our KV Custom Windows typically include strong manufacturer-backed protection on the frame, sealed glass units, and hardware.

Lifetime warranty on white and solid cream windows
15-year warranty on painted windows
Lifetime limited warranty on insulating glass units against seal failure
Lifetime warranty on window hardware

This matters because if a sealed unit ever fails and moisture develops between the panes, that is typically a product warranty issue rather than an installation one.

Workmanship Warranty

This covers the quality of the installation itself. At Great Northern Home Exteriors, every installation includes our 5-Year Workmanship Warranty covering windows, doors, and siding.

Repair or replacement of installation-related issues at no charge
Required capping, fasteners, caulking, or materials included
Valid for 5 years from installation date
Applies to the original purchaser at the original address

You can read the full details here: GNHE 5-Year Workmanship Warranty.

Why the Difference Matters More Than Most Homeowners Realize

A lot of people hear the word “lifetime” and assume everything is covered forever. Not quite. Manufacturer warranties and installation warranties are not the same thing, and that distinction is extremely important.

For example, a manufacturer may cover a failed sealed unit or defective hardware, but that does not automatically mean labour to remove and reinstall the product is covered the same way. That is why homeowners should always ask who handles service, what the labour coverage is, and whether the installer has a written workmanship warranty in place.

What Issues Can Come Up After a New Window Installation?

Most installs go smoothly and stay that way, but a good contractor will also be honest about what can occasionally happen over time.

Real-World Examples Homeowners Should Know

Minor settling can happen as the home moves through seasonal changes
Small caulking separation may appear and simply needs proper service
Rare sealed unit failure can happen, but that is typically covered

The key is not whether a company promises perfection. The key is whether they show up and take care of it properly if something needs attention.

WSIB, BBB, and Proper Business Protection Matter Too

This is one of the most overlooked parts of the entire buying process. A company can tell you any warranty they want, but can you contact them later? Do they answer the phone? Do they return calls? Are they set up properly to protect both you and their workers?

Do Not Skip These Questions

Do you have WSIB coverage?
Do you have a real public reputation, such as BBB credibility?
Is your workmanship warranty clearly written out?
Who handles service calls if something needs attention later?

It is surprising how many contractors do not carry WSIB. That is not a small detail. If something happens at your home and they do not have proper coverage, you could potentially be exposed to liability.

A warranty is not just about the paper. It is about whether the company behind it is legitimate, reachable, and accountable.

What Smart Homeowners Should Ask Before Signing

Here is the honest version: a company can tell you any warranty they want. The better question is whether they will still answer when you need them.

How long have you been in business?
Do you answer service calls quickly?
Do you have WSIB?
Why do you not have BBB backing if you claim to stand behind your work?
Is the workmanship warranty separate from the manufacturer warranty?

At Great Northern Home Exteriors, we have been serving homeowners since 2009, and when a customer reaches out, we get back to them quickly. That responsiveness is part of what makes a warranty actually valuable.

Proper Care Helps Protect Long-Term Window Performance

Warranty coverage is important, but homeowners should also follow proper care guidelines to help their windows perform well over time. The Fenestration and Glazing Industry Alliance recommends using manufacturer care instructions and mild cleaning methods rather than harsh or petroleum-based products that can damage finishes or seals.

You can review that resource here: FGIA window, door, and skylight care guidance.