The Cheapest Time to Replace Windows (And Why Most Homeowners Miss It)

Spring seems like the obvious time to replace your windows. The weather improves, renovation season begins, and having installers work on your house feels much more convenient than doing it in January.

But here’s the thing: the busiest time to replace windows isn’t always the cheapest. By spring, window companies get more calls, their schedules fill up, and the deals you could get earlier might not be available anymore.

For many Canadian homeowners, the better buying opportunity arrives in late fall and winter, when demand slows, and most local companies have more flexibility with pricing and scheduling.

Not every winter quote will be lower, but knowing how the off-season works in the window industry can help you save money, avoid long waits, and enjoy your new windows sooner.

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Why Windows Often Cost Less in Late Fall and Winter

Window replacement has a seasonal demand cycle, much like other home renovation projects. Statistics Canada identifies construction and renovation as highly seasonal industries in Canada. Window companies experience this firsthand, although the exact busy periods vary by region and business.

• For example, Saskatchewan saw the biggest quarterly cost increase at 2.2%, with Newfoundland and Labrador at 1.8% and Manitoba at 1.6%. Over the past year, Saskatchewan also led with 4.8% growth, followed by Alberta at 4.1% and Quebec at 3.5%.

During spring and summer, homeowners who have spent the winter noticing drafts, condensation, or uncomfortable rooms begin requesting quotes. Factories receive more orders, installers have fuller schedules, and desirable installation dates disappear quickly. And by late fall, that pressure often starts easing.

For window companies, quieter months mean fewer new orders competing for production and installation capacity. Some respond with seasonal promotions, more flexible pricing, or additional incentives to keep their operations running consistently.

• It’s like booking a hotel: during busy holidays, prices and availability change compared to quieter weeks, even though the room stays the same.

Window pricing is a bit more complex since every project is unique, but the basic idea about demand affecting price is the same.

The key point is: you don’t have to install your windows in winter to get off-season pricing. Depending on the contractor’s terms, you may be able to sign a contract in November or December, secure the quoted price, and arrange installation for a later date.

For example, with Ecoline you can already sign a contract to lock in 2026 window prices and schedule your installation for early next year, getting a win-win scenario: preserve current prices, choose the most convenient day for replacement,  get help claiming local rebates or loans to offset the project’s total cost.

That’s why when you order your windows can be just as important as when they’re installed.

What Waiting Until Spring Could Cost You

There’s another reason to watch the calendar: window prices can change while you’re deciding. In January, prices often rise by 3% to 5% due to things like inflation, production costs, and gas prices, so manufacturers can keep up with global economic changes.

If you add up the energy savings you miss each month by keeping old windows and multiply that by how long you wait for the “best” time to replace them, the total cost might surprise you.

Based on Ecoline’s historical sales figures, a window that sold for approximately $800 fourteen years ago now averages around $1,600. That represents roughly a doubling in the average selling price over that period and shows how putting off a planned replacement can end up costing more.

How much difference can a 3-5% price adjustment make?

A typical quote for a multi-window replacement project is around $12,000 in 2026. So how much can it potentially change with January’s price adjustments in 2027?

* Approximate estimation assuming the same products, installation scope and pricing basis. The increase is not guaranteed.

That could mean paying up to $600 more for the same project, just because the price changed before you made a decision.

Keep in mind, though, that there is no universal pricing standard across window companies. Two contractors may quote different amounts for the same opening, depending on the window specifications, installation method, finishing work, and warranty.

A quote that’s 10% lower isn’t always a better deal if it leaves out work that’s included in another estimate.

For a detailed comparison, see our guide explaining why replacement window quotes for the same house can differ by thousands.

The takeaway: if you’re already planning to replace your windows, check current prices before the next increase instead of waiting for spring and hoping for a better deal.

Why do window prices keep changing?

Consider what goes into manufacturing a vinyl window: the frames are made primarily from polyvinyl chloride (PVC) or, more specifically, unplasticized PVC (uPVC). By mass, PVC resin is approximately 57% chlorine derived from salt and 43% components derived from hydrocarbon feedstocks, typically oil or natural gas.

The finished window also requires insulated glass, spacers, hardware, weatherstripping, and other components. Then come manufacturing, transportation, labour, and installation costs. Changes in energy prices, material costs, shipping, and wages can all affect the final quote.

In its 2025 renovation price research, Statistics Canada reported that material-price pressures and tariffs contributed to higher renovation costs, including some effects on windows and doors.

These pressures change over time, and sometimes prices level out or even drop. Still, this explains why waiting for a better season doesn’t always mean you’ll get a lower price.

The Other Off-Season Advantage: Getting Your Windows Faster

Seasonal demand affects more than just price. It also impacts how soon your windows can be made and installed. A custom replacement window isn’t manufactured the moment you sign a contract. Several steps happen first:

1. Contract and specifications: The window styles, glazing, colours, and other details are confirmed.
2. Final measurement: A technician verifies the actual dimensions and installation requirements.
3. Order review: The office checks measurements and specifications before releasing the order.
4. Manufacturing and delivery: The windows are produced and transported for installation.
5. Installation scheduling: A crew and suitable date are arranged for your project.

As a rule of thumb, it usually takes about two to three weeks from signing a contract to starting production. In busy times, this can stretch even more. And the total project timeline also depends on manufacturing, configuration, delivery, and installation availability.

That’s why calling a window company in April doesn’t always mean you’ll get new windows by May. Some people end up scheduled for July.

During the quieter season, the situation can look different: Ecoline’s data shows that off-season projects can move about 30% faster from signing the contract to installation compared to busier times.

To make that difference easier to picture, a project taking ten weeks during peak demand could take approximately seven weeks with a 30% shorter turnaround.

That means you could wait three weeks less for the same renovation. Actual timing still depends on the windows you order and local crew schedules.

What happens at the factory when demand slows?

Quieter production periods also provide opportunities for manufacturers to service, maintain, and calibrate equipment without the same pressure of peak-season orders.

That maintenance is part of normal manufacturing quality control. It doesn’t mean windows made in spring are inferior or that every winter order moves immediately into production.

The main benefit for homeowners is that there are fewer orders competing for manufacturing and installation resources. Having a shorter waitlist can matter more than the season itself. For more detail, read how long window replacement takes from ordering to installation.

Isn’t Winter the Worst Time to Install New Windows?

This is where many homeowners pause. Saving money sounds good, but it’s hard not to picture your living room open to -20°C air. But with professional winter window installation, your house isn’t left open for hours while every window is replaced. Experienced installers adapt their process to the conditions.

During colder weather, Ecoline crews work room by room, removing one old window and positioning its replacement before moving to the next opening.

For a straightforward replacement, the opening may be exposed for approximately 15-20 minutes while the crew puts in a new window. The complete installation takes up to one hour because securing, insulating, sealing, and finishing the unit require additional work.

So instead of picturing your whole house open to the cold, imagine just one room being worked on at a time. The rest of your house stays closed off, and your heating can help warm up the room once the new window is in place.

Cold weather does change the installation process

Winter installation is possible, but proper materials and working conditions are vital. Installers must consider the temperature of both the outdoor air and the surfaces receiving the new sealants and insulation. Frost, moisture, and improper product application can compromise adhesion or curing.

The relevant question isn’t simply whether the installer works in winter. It’s whether the specific materials and procedures are suitable for that day’s conditions. Moreover, crews use caulking and foam rated for the cold.

Ecoline’s operational policy also includes a severe-cold cutoff: crews do not proceed with installation at -35°C. Weather, site access, surface conditions, and material requirements may justify postponing work at warmer temperatures too.

That’s completely reasonable. Booking in winter doesn’t mean your installation will happen on the coldest day of the year. Your windows can wait for a good day.

Replacing Windows Before Spring: You Feel the Difference Sooner

If your current windows are drafty and uncomfortable, waiting until spring could mean spending another three or four months heating a house with the same issues.

Natural Resources Canada states that windows, doors, and skylights can account for up to 25% of a home’s energy loss.

That doesn’t mean new windows will automatically lower your heating bill by 25%. The real savings depend on how bad the old windows were, how good the new ones are, the installation quality, and your home’s overall condition.

But improvements to air leakage and thermal performance begin working as soon as the replacement windows are properly installed.

If you’ve been dealing with cold drafts or chilly spots near your windows, you might notice the difference on the very first cold night after replacement.

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How to Time Your Window Replacement Without Overpaying

There isn’t one month that’s always the cheapest for every company or project. The best approach is to know what you’re paying for, when prices might change, and how flexible your schedule is. Here are the most useful decisions to make before placing an order.

Before signing, confirm that the quote includes the agreed window specifications, installation method, finishing work, disposal, taxes where applicable, and warranty.

Also ask two questions: How long is this price valid, and when can the windows realistically be installed?

Getting clear answers to these questions can be more valuable than a big advertised discount.

The lowest price might go to homeowners who order before everyone else does

Spring remains a perfectly reasonable time to install windows. Comfortable weather and convenient scheduling can matter, especially for larger projects requiring exterior work.

But if you wait for spring just because it feels like the right time for renovations, you might miss the quieter ordering period, face a price increase, and end up in a longer installation line.

If your windows need replacing, it’s worth looking into off-season options before you decide to wait.

Planning a window replacement? Request a free quote from Ecoline to compare current pricing, available installation dates, and the options that best suit your home and budget.