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New Windows or New Insulation: What is Best for Energy Efficiency?

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Energy efficiency is a hot topic, and homeowners want to know the best way to make their houses more energy efficient. This blog explains how windows and insulation offer different benefits, how each affects your expenses, and what you should consider when choosing between the two.

Start with Energy Assessment

Whether you’re just getting started or looking for some direction, you can start your journey with an energy management assessment.

As we all try to lead more sustainable lives, energy efficiency has become the main focus. Air Seal IS technicians can provide an informative picture of how your home insulation works and which improvements will deliver the most savings. 

Sometimes called an “energy audit,” this energy assessment provides a comprehensive diagnosis of what’s wrong with your home insulation system.

The assessment is done using blower door testing and infrared imagery to see how effectively the insulation works. It also provides a visual review of your home from top to bottom to identify problems that may limit its performance, such as pest infestation, damp materials, and compression.

Bad Windows May Not Be the Reason for Drafty Rooms

If you notice drafts, difficulty cooling or heating rooms, or excess moisture in your home, the problem may be poorly insulated walls. In many cases, homes with comfort problems aren’t due to insufficient window insulation but rather the missed opportunities for wall insulation. 

Insulation companies recommend replacing windows is usually the last step to improving one’s home’s efficiency.

Insulation Combined With Air Sealing Gives The Best Performance

Air sealing and insulation combined will keep you warm during the winter as well as cool during the summer.

The best way to reduce extra bills is by sealing and insulating your home. Air sealing keeps outside air from filtering through the gaps and cracks identified by infrared imagery. 

With proper insulation, even your HVAC systems will work more efficiently. The airflow inside will be appropriate when it’s sealed off, reducing allergens and dust.

Best Season to Upgrade Insulation

It doesn’t matter if it’s hot, cold, or raining. Air Seal IS has professional insulation teams working on your home all year. Our energy assessment will help you save money and increase comfort. The blower door test and thermal imaging spot air leaks that could cost you big bucks.

Replacing Windows or Improving Insulation

One of the best things one can do to save money on home heating costs is to install new replacement windows. Windows are a big place for heat to escape your home, and since most new homes have aluminum framed windows, this is an excellent opportunity for heat loss.

However, investing in good insulation instead of replacing windows will also help maintain a comfortable temperature range in your home. Windows that are leaking or not moving are a definite sign that they need a replacement.

Replacing windows can also help with energy efficiency, but if you’re seeking better insulation, start with insulation.

ALSO READ: Fiberglass vs. Spray Foam Insulation: Which Is a Better Thermal Insulation Option?

What Are Your Plans For The Old Insulation?

Old insulation tends to compact and collect moisture, which leads to pests and mold growing in your attic. While you could add it to the existing fiberglass or cellulose insulation, there are better options than this one.

Additionally, if you want to seal up your house, removing old insulation is necessary so the insulation company can access all the places that need to be sealed.

If your old insulation hasn’t been damaged, the insulation company can examine it and leave it in place. They’ll take a look and let you know if it’s in good condition. If it is worn out, they might suggest removing it instead.


Both new windows and new insulation can be beneficial for energy efficiency. However, it is essential to consider your home’s specific needs before deciding. New windows may be the best option if you live in an old home with windows allowing drafts. 

Adding insulation may be better if you have a newer home with well-sealed windows. Ultimately, the best way to improve energy efficiency is to consult a professional who can assess your situation and make recommendations accordingly.

Air Seal IS is one the most reputed and professional insulation services providers. 

Contact them at (718) 821-6800 to get your home insulation checked and updated.

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