How Old Insulation Impacts Indoor Air Quality

The influence of insulation is not limited to temperature stability and soundproofing. It can also have profound effects on indoor air quality. As outdated insulating materials age, they become less effective in blocking heat transfer and filtering air contaminants. Households can suffer in different ways when these happen. The best way to solve the problem is by installing new insulation, such as spray foam insulation. Continue reading this Ascend Construction article to learn more about the best insulation for air quality.
How Old Insulation Impacts Indoor Air Quality
Contents
- How Old Insulation Impacts Indoor Air Quality
- Best Insulation for Air Quality
- Effects Of The Best Insulation For Air Quality
- Energy Efficiency Benefits of Upgraded Insulation
- Solving Air Quality Problems
- Insulation for Indoor Air Quality FAQs
- What Are the Signs That My Insulation Needs Replacement?
- Can Old Insulation Affect My HVAC System’s Performance?
- What Are the Health Risks of Prolonged Exposure to VOCs from Insulation?
- How Does Insulation Replacement Improve Allergy Symptoms?
- What Types of Insulation Are Best for Indoor Air Quality?
- How Often Should Insulation Be Inspected or Replaced?
- Conclusion
- Contact Ascend Construction for Reliable Insulation Services in Fort Collins, Colorado
It may seem counterintuitive, but indoor air quality can be worse than outdoor air. Several studies have found that the pollutant concentration is higher in homes that do not actively try to clean the air. Old, outdated insulation contributes to the problem in the following ways:
Excess Moisture

Old insulation can’t withstand moisture. When the rain starts, the material will absorb moisture from the air, further reducing its ability to resist heat. Wet insulation is a conducive environment for mold growth. The fungus can spread across the material and release spores into the air.
Many people are allergic to these spores, so expect signs and symptoms to gradually emerge. These include uncontrollable sneezing, coughing, watery eyes, postnasal drip, and slight fever. Those who have chronic respiratory conditions may have difficulty breathing.
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Pest Infestation

Old insulation can sag and move out of place. Gaps may begin to emerge across the walls, allowing insects, rodents, and even birds to get inside the house. These pests may carry dangerous pathogens, such as viruses and bacteria, which could begin to circulate in the air through the HVAC system.
People may start getting sick because of the infestation. Certain individuals may also have an allergic reaction when they come in contact with these pests, including redness and itching. Getting rid of these pests can be difficult because they live in areas that are out of reach.
VOC Increase
Old insulation may contain volatile organic compounds. These VOCs may be released into the air as the materials degrade. Modern insulating materials are much safer, although these may still release dust particles as they break down.
Both VOCs and dust can circulate around the home. They will cause discomfort and health issues for the occupants. The only way to stop these is to replace the old insulation with fresh insulation. Seek out expert insulation contractors to ensure excellent results.
Foul Odors
Old insulation may let outdoor air get inside the house through emerging gaps. This might be foul air due to smoke and gas from the streets and other unpleasant substances. Bacteria may also thrive in the insulating materials because of the warmth and humidity. Over time, the bacteria can produce a bad smell that will permeate the house. This is most obvious when entering the home after being outdoors for a while.
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Best Insulation for Air Quality
Selecting the right insulation is crucial for maintaining excellent indoor air quality. Some of the best options include:
- Spray Foam Insulation: This modern material forms an airtight seal, preventing air leaks, moisture infiltration, and pest entry. Its low VOC formulas ensure minimal impact on air quality while providing superior thermal performance.
- Cellulose Insulation: Made from recycled materials and treated to resist fire, mold, and pests, cellulose is a sustainable and effective option for air quality improvement.
- Fiberglass Insulation with Low-VOC Bindings: Fiberglass is a classic choice, now available in eco-friendly formulations that reduce VOC emissions and minimize airborne particles.
When choosing insulation, it’s essential to consider your home’s unique needs and climate. Professional installation ensures these materials perform at their best, keeping your home safe, comfortable, and healthy.
Effects Of The Best Insulation For Air Quality
Minimize Mold Spores
New insulation with quality materials and proper installation will keep moisture out. You won’t have to worry about the rain because moisture will not seep in. The insulation can stay dry throughout the wet season, so mold and mildew will not be a concern. It means that fungi won’t be able to thrive inside the house, and there won’t be many spores that could trigger allergic reactions. People should be able to breathe better after an insulation upgrade.
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Keep Pests Outside
After applying the new insulating materials, the gaps along the walls will be covered again. These will block any creature trying to get in, reducing the likelihood of infestation. You won’t have to see insects and rodents crawling around your home. You will not have to deal with embarrassment when guests come by. Most importantly, you will prevent the spread of dangerous pathogens that could lead to illness in the family.
Reduce Indoor VOCs

Older types of insulating materials are known to contain volatile organic compounds. VOCs are also present in paints, solvents, aerosol sprays, household cleaners, moth repellents, and pesticides. These compounds can trigger irritation of the eyes, nose, and throat.
They can also make people feel nauseous. Long-term exposure may lead to liver, kidney, and nervous system damage. It may even result in cancer. Upgrading your insulation can lower the risk of these health threats.
Maintain Indoor Freshness
Wet and soggy insulation won’t be effective in blocking heat. They may even create headaches by letting bacteria grow, which, in turn, can produce a foul smell. By replacing the old insulation, you can keep the walls dry and prevent bacteria from thriving. The home will smell much nicer after this change. Try to keep other wet areas of the house clean and dry as well, including the laundry, kitchen, and bathrooms.
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Energy Efficiency Benefits of Upgraded Insulation
Beyond improving indoor air quality, upgrading your insulation offers significant energy efficiency advantages. New insulation materials like spray foam or cellulose create a tighter seal against air leaks. This reduces the strain on your HVAC system and minimizes heat transfer, leading to lower energy consumption. Homeowners can expect a noticeable drop in their utility bills while enjoying more consistent indoor temperatures year-round.
Properly installed insulation also reduces your home’s carbon footprint, making it an environmentally responsible choice. For maximum efficiency, consult insulation experts to assess areas of energy loss and recommend the best materials for your home’s specific needs.
Solving Air Quality Problems

To improve indoor air quality, you must know the common sources of allergens and pollutants. These include carbon monoxide from appliances, radon from old homes, and cigarette smoke from family members. Don’t forget the contribution of old insulation as well. As you can see from the list above, the natural degradation of insulating materials creates problems for homeowners.
Do not neglect the drop in performance and indoor air quality. Consult a professional insulation contractor to determine the best way to counter these. They can help you choose a suitable insulation replacement based on your needs and budget.
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Insulation for Indoor Air Quality FAQs

What Are the Signs That My Insulation Needs Replacement?
Signs of aging insulation include higher energy bills, drafts in certain areas of the home, pest infestations, visible mold or water damage, and a musty odor. If you notice these issues, it may be time to consult a professional for an inspection.
Can Old Insulation Affect My HVAC System’s Performance?
Yes, old or damaged insulation forces your HVAC system to work harder to maintain indoor temperatures. This increases energy consumption, reduces the system’s lifespan, and can worsen indoor air quality by circulating contaminants.
What Are the Health Risks of Prolonged Exposure to VOCs from Insulation?
Prolonged exposure to volatile organic compounds (VOCs) can lead to respiratory irritation, headaches, dizziness, and long-term effects like liver, kidney, or nervous system damage. Upgrading to modern, low-VOC insulation materials can mitigate these risks.
Improve Indoor Comfort And Air Quality Today: Ascend Construction offers top-notch insulation services tailored to your needs. Contact us for a free consultation!
How Does Insulation Replacement Improve Allergy Symptoms?
New insulation helps block moisture and prevent mold growth, reducing airborne spores that trigger allergies. It also seals gaps that allow pollen, dust, and pest allergens to infiltrate the home, improving indoor air quality.
What Types of Insulation Are Best for Indoor Air Quality?
Spray foam insulation is an excellent choice because it can seal gaps, resist moisture, and prevent air leaks. Other eco-friendly options, like cellulose or fiberglass with low-VOC adhesives, can also improve air quality while being sustainable.
How Often Should Insulation Be Inspected or Replaced?
Insulation should be inspected every 10-15 years or sooner if you experience issues like increased energy bills, drafts, or moisture problems. Replacement intervals vary depending on the type of insulation and local climate conditions. Consulting a professional can provide a clear timeline for your home.
Conclusion
Maintaining good indoor air quality requires addressing key issues like pollutants, allergens, and outdated materials. Upgrading to the best insulation for air quality, such as spray foam or cellulose, reduces mold, pests, VOCs, and odors while boosting energy efficiency and year-round comfort. Regular inspections and timely replacements are vital. Trust a professional insulation contractor to deliver lasting results that ensure your home remains a healthy and energy-efficient space.
Contact Ascend Construction for Reliable Insulation Services in Fort Collins, Colorado
When it comes to insulation and air sealing upgrades, choosing the right provider is essential for quality results at a fair price. Ascend Construction stands out as a trusted expert, offering comprehensive services that include insulation removal and installation, air sealing, energy audits, energy conservation solutions, and whole-house fan installations.
Experience top-tier service that goes beyond expectations, delivering exceptional results tailored to your home’s unique needs. Choose Ascend Construction for professional expertise and competitive pricing. Contact us today to schedule your consultation!

Contact Ascend Construction for a free consultation today. We can provide you with practical solutions to address the problem areas in your Fort Collins home. All of our services are affordable, and our work is guaranteed. Click here to contact us, or click the button below to give Ascend Construction a call. We offer free, no-obligation, in-home consultations.
Ascend Construction
301 S Howes St #1241
Fort Collins, CO, 80521
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