North Star Windows Installer London ON: 5 Energy Gains

If you live in London ON and feel drafts near your windows or dread the next gas or hydro bill, you are not alone. Older glass, leaky frames, and poor installation can let a lot of heat slip outside during winter and bring too much heat in during summer.
Energy-efficient windows are one of the most effective upgrades you can make. Natural Resources Canada estimates that inefficient windows can account for up to 25% of a home’s heating and cooling energy loss, while energy-efficient models can trim bills by up to 10%.
This is where North Star Windows, installed by an experienced local team, can make a real difference. McCallum Aluminum has installed windows and doors in London since 1957, and sells Energy Star-certified vinyl windows from North Star backed by strong product and workmanship warranties.
Below are 5 strategic ways these windows, installed correctly, can improve your home’s energy performance and comfort.

Why Energy-Efficient Windows Matter in London ON

London ON sees cold winters, humid summers, and big swings during spring and fall. That puts constant stress on your building envelope. Every small leak adds up.
Key reasons windows matter so much:
Glass has a large surface area, so heat flows through it quickly.

Frames and sashes can warp or shrink with age.

Poor or failing caulking leaves gaps you may not see, but you feel as drafts.

ENERGY STAR® certified windows are designed to reduce that heat transfer. The ENERGY STAR program notes that certified windows, doors, and skylights can shrink heating and cooling bills by up to 13% on average compared with standard models.
North Star pairs that performance with designs tested and certified by the Canadian Standards Association and other industry bodies. When those products are installed by a skilled North Star Windows installer London ON, you get a window system that works as a whole, not just a better piece of glass.

1. Certified North Star Glass Cuts Wasted Energy

North Star Windows include ENERGY STAR® compliant glass across all product lines. This glass is engineered to slow heat loss in winter while still letting natural light in.
ENERGY STAR® performance you can see on your bill
On the ENERGY STAR page for residential windows, doors, and skylights, the program states that certified products can lower heating and cooling costs by up to 13% on average. That may sound like a modest percentage, but for a typical detached home, it can translate into meaningful yearly savings over the life of your windows.
Practical benefits of North Star’s glass systems:
Low-e coatings reflect heat back into your home in winter and keep solar heat outside during summer.

Insulated glass units reduce conductive heat loss through the glass.

Gas fills between panes help slow heat transfer even further in many configurations.

McCallum Aluminum supplies these high-performance North Star units as part of its energy efficient window replacements for London homeowners, so you are not just swapping in new glass, you are upgrading the entire system.

2. Better Frames and Seals Reduce Drafts and Cold Spots

Even the best glass will underperform if air moves freely around the frame. That is why frame design, weatherstripping, and installation details matter just as much as the glass itself.
North Star’s vinyl frames are designed to meet or exceed industry standards and are backed by a limited lifetime warranty. Paired with careful installation, you get:
Tighter seals around the sash, which reduce drafts near seating areas and beds.

Improved interior surface temperatures, so you feel less “cold radiation” near windows on winter nights.

Less condensation on interior glass when sized and ventilated correctly, which helps protect frames and finishes.

For older London homes with original single-pane or early double-pane windows, this change can be dramatic. Rooms that once felt off-limits on cold days often become usable again after replacement.

3. Professional Installation Protects Performance

A high-quality product still needs high-quality installation. Gaps, out-of-square frames, and rushed caulking can undermine performance and shorten the life of the window.
McCallum Aluminum has specialized in exterior renovations since 1957 and offers a lifetime workmanship warranty on window installations. That experience matters in a few key ways:

Precise measurements: Windows are ordered to fit your openings so there is enough room for insulation without leaving large voids.
Proper insulation of the window cavity: This reduces hidden drafts around the frame, not just at the sash.
High-quality sealants and flashing: Correct detailing helps keep bulk water out of the wall, which protects energy performance and structure.

When you work with a local North Star Windows installer London ON, you are not guessing whether the window will perform as advertised. The team has installed these exact products in many London neighbourhoods, in real Canadian weather, for decades.

4. Built for Ontario’s Four-Season Climate

North Star Windows are manufactured in Talbotville, just south of London, and are designed with Canadian conditions in mind. That local focus helps with both performance and support.
Benefits for Ontario homeowners include:

Energy-efficient vinyl construction that handles freeze-thaw cycles without rust or rot.
Tested performance ratings under Canadian and North American standards, so you can match products to your exposure and climate zone.
Styles that suit local homes, from casement and sliders to bay and bow windows, which lets you upgrade efficiency without changing the character of your house.

For London ON homeowners, this means you can choose windows that handle lake-effect snow, wind, and summer heat while still looking right for your street.

5. Better Windows Support Rebates and Long-Term Savings

Energy-efficient windows do more than keep you comfortable. They can also help you qualify for energy-efficiency programs when available and support long-term savings.
Natural Resources Canada provides guidance on choosing energy-efficient windows and outlines how ENERGY STAR® certified models and top-tier “Most Efficient” products outperform average options by significant margins.
When you pair: ENERGY STAR® certified North Star Windows with guidelines from ENERGY STAR and NRCan on performance ratings and rebate requirements, you set your home up for better thermal performance for many years. Even if specific rebate programs change over time, the lower monthly costs remain.

How to Get a Free Estimate Window Installation London ON

When you are ready to compare options, a free estimate window installation London ON is the ideal next step.
During your estimate, you can expect:

A review of your current windows and any problem areas
Recommendations on North Star styles that match your home and budget
Discussion of energy performance, warranties, and project timelines

Contact McCallum Today!

Visit the Windows page to see the styles and features:
https://mccallumaluminum.on.ca/windows/

Contact

https://mccallumaluminum.on.ca/contact/

Is North Star Right for Your Home? A Quick Checklist

Use this simple checklist to see if North Star Windows with professional installation are a strong fit:
Your home feels drafty or uneven in temperature near windows.
You see condensation between panes or on the inside glass in winter.
Your windows are difficult to open or close, or the frames are damaged.
You want ENERGY STAR® certified products tested for Canadian conditions.
You value long-term warranties on both product and workmanship.

If you are nodding “yes” to several of these, it is time to talk to a local installer and see what a tailored window plan looks like.

Turn Energy Loss into Year-Round Comfort

Energy performance is not just about numbers on a chart. It is about how your home feels on a February morning or a humid August night. North Star Windows give you high-performance glass, durable frames, and strong certifications. When installed by a trusted London ON contractor with a long history in the community, they help turn cold, drafty rooms into comfortable, usable spaces while supporting lower energy costs over the long term.
The next step is simple: review your options, ask questions, and book a free estimate so you can see how these upgrades fit your home and budget.

FAQs

1. Are North Star Windows really ENERGY STAR® certified?
Yes. North Star uses ENERGY STAR® compliant glass in all of its window product lines, and the company participates in programs that rate thermal and solar performance under Canadian and North American standards.
2. How much can energy-efficient windows actually save on bills?
ENERGY STAR reports that certified windows, doors, and skylights can cut heating and cooling bills by up to about 13% on average compared with non-certified products, while NRCan notes that replacing inefficient windows can save up to around 10% on home energy costs. Actual savings depend on your home’s size, insulation, and existing windows.
3. Do I need to replace all my windows at once?
Not always. Many homeowners start with the worst-performing rooms, such as drafty living rooms or bedrooms, then phase in the rest over time. A free estimate can help you prioritize based on energy loss and budget.
4. How long does North Star window installation take in London ON?
Most standard window replacement projects for a typical home can be completed in one to a few days, depending on the number of units and site conditions. Your installer will give you a schedule during the estimate so you know what to expect.
5. How do I know if my windows qualify for energy rebates?
Rebate programs change, but most look for ENERGY STAR® certified products and specific performance ratings. You can review ENERGY STAR’s residential windows, doors, and skylights page and NRCan’s buyer guides, then confirm details with your installer and local utility.

5 Strategic Ways North Star Windows Improve Your Home’s Energy Performance in London ON