As an expert in the field of insulation, I have seen the benefits and drawbacks of various types of insulation. One popular option is blown-in insulation, also known as loose-fill insulation. While it has its advantages, there are also some cons to consider before choosing this type of insulation for your home. One of the main disadvantages of cellulose blow insulation is its tendency to settle and compact over time. This can create gaps in the insulation, reducing its effectiveness.
Unlike other types of insulation that come in pre-packaged forms, blown-in insulation can be easily shaped and molded to fit any space. However, this flexibility can also be a drawback as it may not maintain its shape and density over time. In addition, blown-in cellulose insulation is made from paper products, which means it is highly absorbent. This can be problematic if there is a leak in the roof or pipes, or if there is high humidity in the area. The moisture can seep into the insulation and become trapped, creating a breeding ground for mold and mildew.
Not only is this a health hazard, but it can also damage the insulation and reduce its effectiveness. Another drawback of blown-in insulation, specifically blown fiberglass, is that it can settle over time. As it settles, the R-value (a measure of thermal resistance) decreases, making the insulation less effective. This means that after about 15-20 years, you may need to add more insulation to maintain the desired level of R-value. However, not all blown-in fiberglass insulations are created equal. Some contain up to 53% recycled glass, which helps prevent excessive settling after installation.
This type of insulation also has the added benefit of being one of the most affordable options on the market. When considering the pros and cons of attic insulation, it's important to weigh the long-term benefits against the initial cost. While blown-in insulation may be more expensive upfront, it can save you money in the long run by reducing your energy bills and improving the overall energy efficiency of your home. One of the biggest advantages of blown-in insulation is its longevity. Unlike other types of insulation that may need to be replaced every 10-15 years, blown-in insulation can last for decades without needing to be replaced. This makes it a cost-effective option in the long term. It's also worth noting that blown-in insulation is not limited to just cellulose and fiberglass.
There are other materials available, such as thick, dense, lumpy insulation, that can be blown into attics and other spaces. These materials may have their own unique drawbacks, so it's important to do your research and consult with a professional before making a decision.
