Can Your Attic Insulation Go Bad?

Attic insulation is a crucial part of helping to maintain a comfortable and energy-efficient home, especially during the cold Winnipeg winters.

Most homeowners don’t think about the possibility that their attic insulation could degrade over time, but, like many building materials, it can deteriorate. Understanding whether or not your attic insulation has gone bad involves looking at different factors.

 

What Type of Insulation Do You Have?

There are many different types of insulation available, each one with its own lifespan and characteristics. These include:

• Fibreglass Batts – This type typically lasts between 20-30 years if installed correctly and kept dry.

• Blown-in Fibreglass – Similar to batts, this style can last 20-30 years, but its effectiveness can decrease if it becomes compacted.

• Cellulose – Cellulose is made from recycled paper and can last up to 20 years. However, it is susceptible to moisture, which can lead to the insulation developing a “crust” on the top of the insulation layer reducing the overall R-value.

• Spray Foam – This type can last indefinitely if installed properly, but exposure to UV light can degrade its effectiveness over time.

• Mineral Wool (Rock Wool) – Mineral wool is known for its fire resistance and can last more than 50 years if properly maintained.

Factors That Lead to Insulation Going Bad

There are many different things that can cause your attic insulation to go bad. These include:

• Moisture – One of the most significant factors in the degradation of insulation is moisture. Excessive moisture can lead to mould growth, which not only inhibits the insulation's effectiveness but can also pose health risks.

• Pest Infestation – Pests such as rodents, insects, or even birds can damage insulation, using it for nest material.

• Compaction – Over the years, some insulation materials, especially loose-fill types, can settle or become compacted. This reduces their R-value (thermal resistance), meaning they are less effective.

• Air Leaks – Air leaks in the attic can lead to temperature fluctuations that affect the insulation's efficiency and lifespan.

• UV Exposure – Some types of insulation, such as spray foam, will degrade over time when exposed to ultraviolet light.

Signs of Deteriorating Insulation

You should be on the lookout for signs that your insulation is nearing the end of its life, such as:

• Increased Energy Bills – If you notice a sudden increase in heating or cooling costs that can indicate your insulation is no longer effective.

• Drafts – Are you feeling cold drafts in the upper levels of your home? That may suggest that your insulation is getting old.

• Mould or Mildew – The presence of mould or a musty smell in your attic is a sure sign of moisture and potentially deteriorated insulation.

• Presence of Pests – Signs of rodents or insects, such as droppings or nests, can indicate that your insulation has been damaged.

• Visible Damage – Inspect the insulation for signs of wear, such as tears or compression. This can help you identify problems.

Trust Warm Home Insulation for Your Attic Insulation

It may sound strange, but your attic insulation can absolutely go bad. If you notice the insulation in your home has started to deteriorate, you can call Warm Home Insulation to replace it. We can insulate attics of various types for homes throughout Winnipeg. Contact us today to request an estimate.