Do I Need New Insulation After a Pest Infestation in My Attic?

Published on November 01, 2025

Pest infestations are common in attics, especially as temperatures drop. During the fall and winter in Ontario, birds, insects, and other vermin look for somewhere warm to wait out the weather, often finding themselves in attics where the insulation provides them warmth. The problem is, as these animals nest and take up space in your home, they can damage your insulation and other essential attic structures, which may leave you in need of professional attic insulation removal and replacement. If you notice the signs of pests in your attic or your energy efficiency is declining, contact EcoComfort Insulators, a leading and experienced insulation company in Toronto.

When you have a pet infestation in your attic, here’s what you need to know about upgrading your home's attic insulation. 

How to Know If There Are Pests in Your Attic

The first step to resolving insulation damage caused by pests is identifying whether you have an infestation in the first place. Some common signs of vermin, birds or insects in your attic include scratching or scurrying noises at night, droppings, or chewed materials near vents and entry points. You may also notice foul odours or insulation that appears flattened, shredded, or damp.

Pests such as squirrels, mice, and birds often use insulation as nesting material, while others may contaminate it with urine or feces.  Once attic insulation is compromised, it no longer effectively traps heat, leading to uneven temperatures and higher energy bills. In these cases, professional attic insulation removal is a necessary investment, as it will help restore the condition of your attic and prevent further contamination, by removing ineffective and potentially hazardous insulation. 

If you notice changes to your indoor environment, book an attic inspection with our experts at EcoComfort. We will provide a comprehensive assessment and recommendations for your home and attic. 

Why Removal and Replacement Matter

Leaving damaged or contaminated insulation in your attic can create several long-term problems. Beyond reducing your home’s energy efficiency, it can lead to poor indoor air quality, unpleasant odours, and potential mold growth. Moisture can also accumulate in areas where pests have disturbed insulation, causing structural wood to rot or weaken over time.

When you work with an insulation company in Toronto like EcoComfort, the team will safely remove old insulation, assess the extent of damage, and recommend a replacement solution that enhances energy performance while discouraging future infestations.

The Benefits of Blown-In Cellulose Insulation

After proper cleaning and removal, installing blown-in cellulose insulation is an effective and environmentally friendly solution. Made from treated recycled paper, this type of insulation naturally resists mold, fire, and pests. The dense material fills even the most minor gaps and cracks, helping to seal off entry points that rodents or insects might exploit in the future.

Compared to other types of insulation that were once very popular, blown-in cellulose insulation offers adequate coverage and higher R-values, meaning better thermal performance and comfort throughout the year. It’s also a sustainable choice, reducing energy waste and supporting a greener home environment.

Protect Your Attic and Home with Prompt Attic Insulation Removal in Toronto

If your attic has experienced pest damage, don’t wait for the problem to worsen. Contaminated insulation can spread allergens and bacteria throughout your home, putting your health and comfort at risk. Our professional attic insulation removal services, followed by high-quality insulation replacement, ensure your attic is clean, safe, and energy-efficient.

Contact our team today to schedule your inspection and learn how we can improve your home with durable, high-performance insulation solutions.

Book an attic inspection.

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