

What Is The Best Window Warranty? A Comprehensive Guide
Oct 15, 2025
7 min read
151
While most homeowners will assess the quality of windows they are buying, and look into companies with good window installation services, very few pay attention to the importance of window warranty at the time of purchase.
Yet, the warranty should be just as important as product quality and correct installation. When you consider that your new windows should last you at least 25 years, you also want them to be under warranty for the duration of that time. Most importantly, you want a company that will likely still be there twenty years down the road and provide service in case you need it.
Unfortunately, not many window companies in Canada offer honest warranties or use the warranty as a sales tactic to make themselves more appealing to homeowners. So how do you make sure you end up not only with great windows but best replacement window warranty to match as well?
Let’s go through what you need to look for in a window company’s warranty so that you can have a better understanding at the time you’re deciding on which windows to get.
What Does Window Warranty Cover?
If you already had a window quote or are planning on getting one, when the question of warranty comes up, the salesperson will tell you it’s a lifetime warranty windows. We’ll get to exactly what means. But for now, what you should know, is that not all parts of your window are covered for the same period of time.
When looking at a Canadian window manufacturer’s warranty, there are three main things to pay attention to:
1. How long is window warranty for vinyl components?
Usually, this refers to brick moulds, jambs, and any vinyl part of the window. This is where most window companies offer a lifetime warranty on windows, so it is not uncommon to see the deals for 25 years.
2. How long is the window glass warranty?
This is the most important part. The insulated glass unit is the actual sealed combination of glass panes and gas-fills. This is where the real magic happens in modern windows when it comes to keeping your home warm and comfortable, and saving you money on energy bills.
Unfortunately, these are also the most susceptible parts of a window. Most window companies offer warranties on their sealed units ranging between 10-20 years. Take note, however, that this warranty usually doesn’t cover acts of nature. Hail damage, flying pebbles, or a wild baseball throw will mean you have to pay for a new sealed unit out of pocket.

3. What is the labour warranty on windows?
This is almost as important as the sealed unit warranty. Most window companies have labour warranties ranging between two and ten years. However, the labour warranty only covers problems associated with correct installation.
Hence, you will likely be charged for a sealed unit replacement after 1-2 years even if the window company offers a generous labour warranty. Some window companies consider sealed unit replacement “skilled labour” and don’t offer any warranties on that work.
What Does Ecoline Windows Warranty Cover?
At Ecoline Windows, we always stand behind our products long after they are installed. We offer a 25-year window warranties that cover:
- All parts – from frame components and hardware to insulated glass units
- Labour – for any warranted repair or replacement work
That means whether it’s a frame issue, seal failure, or any other defects, we’ll take care of it from start to finish.
While some manufacturers or installers limit labour or exclude certain parts after a few years, Ecoline warranty ensures we will be there for you for many years to come.
Because we’ve been in operation for over 20 years and currently serve six provinces and more than 20 cities, you can trust that we’ll still be here 25 years down the road to support your windows, whatever the issue.
We manufacture. We Install. We Warranty.

How Do You Tell if A Window Warranty is Legitimate?
Because warranties are often written in the same confusing legalese as window contracts, it can be challenging to figure out exactly what is covered and for how long. One word you will undoubtedly see on typical window warranty is “limited.” This is where a warranty enters the grey area.
A company can say they offer a “limited lifetime warranty” on something, but once you start looking into the limitations and conditions, you will realise that the warranty itself is not worth all that much. This is especially important when you’re looking at labour warranties for your window replacement.
Whether in your consultation appointment, or at the time of signing your contract, be sure to ask exactly what the standard window warranty is on things like sealed unit replacement, screen replacement, caulking, capping, and anything else that comes to mind. Chances are, warranties for some of these factors will be significantly shorter than the overall specified timeframe.
Is Lifetime Warranty on Windows Actually a Scam?
This is another common pitfall for homeowners shopping for new windows. They see that the website or contract says “lifetime warranty” and think “great I never have to worry about my windows again, they’re covered for life.”
In fact, what most companies fail to mention when talking about warranties, is that lifetime usually refers not to how long you will live, but the expected lifetime of the product you are purchasing. Different materials have their own life expectancy, but with vinyl components a lifetime is considered 25 years. 25 years is also the standard lifetime for insulated glass units in your window.
Window manufacturer vs. supplier warranty
Another important aspect of a good warranty depends on the type of company you buy the windows from. If you are buying from a dealer or re-seller, you may be in a situation where the dealer installs your windows and you have to go directly to the manufacturer to get window service once you need.
While this is isn’t the end of the world, adding more people to the equation usually results in longer wait times and delays in receiving parts or labour. Suppliers that have their own designated installers usually perform the service themselves. This should mean your service is processed and taken care of faster.
FAQ
What is the window installation warranty?
A window installation warranty protects homeowners from issues caused by improper installation, such as drafts, leaks, or alignment problems. This means if anything goes wrong due to workmanship, you’re fully covered under labour warranty for windows – no extra costs or surprises.
How long are window warranties?
Most manufacturers in Canada offer warranties ranging from 10 to 25 years, depending on the product and installer. Ecoline provides an industry-leading 25-year warranty on windows, covering both parts and labour. Some homeowners also refer to it as a lifetime warranty on windows, as it’s designed to protect your investment for decades and ensure your peace of mind for as long as you own your home.
Do windows have a warranty?
Yes, all quality products come with a windows guarantee. When you purchase energy-efficient vinyl windows from reputable suppliers, they automatically include a comprehensive home window warranty. This covers manufacturing defects, insulated glass units, hardware, and more, so your new windows remain durable, functional, and airtight for many years to come.
What does a good window warranty include?
A reliable warranty for windows should cover three main areas: materials, labour, and installation. Look for terms that include full coverage of glass seal failures, frame integrity, and hardware performance. The best companies offer transparent, transferable, and long-term warranty windows that guarantee both quality craftsmanship and lasting performance.
1750 Coast Meridian Rd #102,
Port Coquitlam, BC V3C 6R8
100, 17866 106A Avenue,
Edmonton, AB, Canada,
T5S 1V3
3307 Dunmore Rd SE #12,
Medicine Hat, AB,
Canada, T1B 3R2
2081 Merivale Rd #201, Ottawa, ON, Canada, K2G 1G9
by appointment only
109 Ilsley Ave Unit #3, Dartmouth,
NS, Canada, B3B 1S8