How to Tell If Your Blanket Insulation Needs Replacement

Blanket insulation — whether fiberglass or mineral wool — plays a big role in keeping your home comfortable and energy efficient. But like any building material, insulation doesn’t last forever. Over time, it can lose its effectiveness due to age, moisture, or damage. Knowing when it’s time to replace your insulation can save you from higher energy bills and uncomfortable indoor temperatures.

At Custom Insulation Company, Inc., we help homeowners throughout Massachusetts identify when their blanket insulation needs attention — and replace it with high-quality materials that restore comfort and efficiency. Here are the key signs to look out for:

1. Uneven Temperatures Around the House

If some rooms feel warm while others stay chilly, your insulation may have deteriorated or shifted over time. Uneven temperatures are often a sign that your blanket insulation no longer provides consistent thermal protection.

2. Higher Energy Bills

An unexplained increase in heating or cooling costs often points to poor insulation. When your insulation loses its R-value (its ability to resist heat flow), your HVAC system has to work harder to maintain the right temperature — costing you more money every month.

3. Visible Damage or Moisture

If you can access your attic, basement, or crawl space, check your insulation for signs of water damage, mold, or pests. Moisture can cause fiberglass batts to clump or compress, reducing their effectiveness and creating unhealthy indoor conditions.

4. Drafts or Cold Spots

Feeling a draft near walls, floors, or ceilings? That’s often a sign that your insulation has gaps or voids. Over time, blanket insulation can settle or become displaced, leaving areas exposed to outside air.

5. Age of the Insulation

If your home is more than 15–20 years old and hasn’t had its insulation replaced, it’s likely time for an upgrade. Modern insulation materials are more efficient, environmentally friendly, and longer lasting than older products.

6. Pest Infestation

Rodents and insects can nest in insulation, leaving behind contamination and damage that reduce its performance. If you notice signs of pests, it’s best to have a professional inspection right away.

When in Doubt, Call the Experts

Replacing old or damaged insulation can dramatically improve your home’s comfort, energy efficiency, and indoor air quality. At Custom Insulation Company, Inc., our experienced team can inspect your existing insulation, identify problem areas, and install high-quality blanket insulation that performs for years to come.

Contact Custom Insulation Company, Inc. today to schedule a professional insulation evaluation — and make sure your home is properly protected, season after season.