Attic needs Insulation Replacement

Top 3 Signs Your Attic Needs Insulation Replacement

The attic is an integral part of your home’s insulation system, as it plays a crucial role in regulating the temperature and moisture levels inside your house. If your attic is not properly insulated it can lead to higher energy bills, uncomfortable living conditions, and it can even cause damage to your home. Whether you have fiberglass insulation or spray foam insulation, understanding what to look out for ahead of time is an important step in keeping your attic insulation maintained and working well. Minimize your heating and cooling costs by ensuring that your insulation doesn’t need replacing.  

How Do I Know if My Attic Insulation Needs Replacing?

High Energy Bills

One of the first signs that your attic needs insulation replacement is a sudden increase in your energy bills. If your home is not adequately insulated, your HVAC system will have to work harder to regulate the temperature, leading to higher energy usage and increased heating and cooling costs. In some cases, you may notice that your energy bills are significantly higher than they were in previous months or years, even if you have not made any changes to your energy usage habits.

Uneven Temperatures

Another sign that your attic needs insulation replacement is if you notice uneven temperatures throughout your home. If your attic is not adequately insulated it can cause hot or cold air to escape, leading to significant temperature variations in different parts of your home, making your home less energy efficient than it should be. For example, you may notice that some rooms are too hot during the summer months, while others remain cool and comfortable.

Pest Infestations

If your attic insulation is old, damaged, or inadequate, (and a visual inspection might confirm this) it can also attract pests like rodents, insects, and birds. These pests can cause significant damage to your insulation, leaving your attic vulnerable to temperature fluctuations and moisture buildup. In addition to the damage they cause, pests can also pose health risks to you and your family, as they can spread disease and allergens throughout your home. How can you tell if there is a pest infestation in your attic?

  •         Strange noises: If you hear scratching, rustling, or scurrying noises coming from your attic, this could be a sign of pests, such as rodents or birds.
  •         Droppings: Pest droppings are a common sign of infestation. Look for small, dark droppings near your insulation, along walls or in corners of your attic.
  •         Nests or debris: Pests often build nests or leave debris behind in their search for food and shelter. Look for piles of nesting materials, shredded insulation, and other debris in your attic.
  •         Chewed wires or insulation: Rodents in particular are known for chewing through wires, insulation, and other materials in your attic which can cause serious damage and pose a fire hazard.

How Do I Know If My Attic Insulation is Bad?

In addition to the signs listed above, there are other ways to tell if your attic insulation is no longer doing its job. Making a visual inspection periodically will help you keep an eye on when it might be time to consider replacing or adding to it.

Moisture Problems

If you notice moisture buildup or water damage in your attic or on your ceiling, this could indicate that your insulation is not effectively preventing moisture from seeping into your home.


If your insulation is more than 15-20 years old, it may be approaching the end of its lifespan and should be inspected for damage or wear.

Visible Damage

If you notice that your insulation is torn, damaged or compressed, this could indicate that it is no longer providing you with adequate protection.

How Often Should Attic Insulation Be Replaced?

The lifespan of your existing insulation depends on several factors including the type of insulation, the climate zone you live in, and how well the insulation was installed and maintained. However, as a general rule of thumb, most attic insulation should be replaced every 15-20 years.

If you’re unsure about the state of your existing insulation, it’s best to consult with a professional insulation contractor, like the experts at Attic Construction, who can assess your insulation and recommend any necessary repairs or replacements.

Is It OK to Put New Insulation Over Old Insulation?

In many cases, it is acceptable to put new insulation over existing insulation in your attic. There are some important factors to consider before you do:

  •         Condition of old insulation: Before adding new insulation, make sure to assess the condition of the old insulation. If the old insulation is wet, moldy or damaged in some way, it should be removed before new insulation is added. Also, if the old insulation has compressed or settled significantly, adding new insulation over it may not be effective.
  •         Type of old insulation: It’s important to check the type of insulation that is already installed in your attic before adding new insulation. If the old insulation is made of vermiculite or contains asbestos, it should be removed by a professional before adding new insulation.
  •         Height of new insulation: Adding too much insulation can cause issues with ventilation, which can lead to moisture problems and reduced energy efficiency.
  •         Proper installation: When adding new insulation over old insulation, be certain that it is installed correctly to prevent any air gaps or voids. Air gaps can reduce the effectiveness of the insulation and lead to energy loss.

When Should I Add More Insulation to My Attic?

Adding more insulation to your attic can be an effective way to improve energy efficiency, reduce energy costs, and make your home more comfortable.

  •         Check the current level of insulation: The recommended level of attic insulation varies depending on the climate zone you live in. As a general rule of thumb, you should have at least 12-14 inches of insulation in your attic. If your insulation level is lower than this or if it’s been compressed or damaged over time, it may be time to add more insulation.
  •         Home renovation or remodeling: If you’re planning to remodel or renovate your home, it’s a good time to consider adding more insulation to your attic. This can help improve the energy efficiency of your home and reduce heating and cooling costs.
  •         Aging insulation: Over time, insulation can become less effective due to wear and tear, settling, and degradation from moisture and pests. If your insulation is more than 15-20 years old, it may be time to add more insulation.

What Happens When Insulation Gets Old?

Over time, insulation can become less effective due to a variety of factors. There’s general wear and tear, potential pest issues, and inevitable settling. Here’s what else can happen when insulation gets old:

  •         Reduced insulation value: Insulation is designed to slow down the transfer of heat, keeping your home warmer in the winter and cooler in the summer. As insulation ages, it can become compressed or settle, reducing its ability to trap air and slowing down its insulating properties.
  •         Moisture problems: Insulation can absorb moisture over time, reducing its effectiveness and potentially leading to mold growth or other moisture-related problems.
  •         Health concerns: Old insulation may release fibers or particles that can irritate the eyes, skin, and respiratory system. In fact, some older insulation materials may contain harmful chemicals such as asbestos.

What Should I Know About Batt Insulation?

Batt insulation (also called blanket insulation) is a type of insulation material made from fiberglass, rock wool, or cotton that is commonly used to insulate attics.

  •         R-value: The R-value is a measure of the insulation’s effectiveness in slowing down the transfer of heat. The higher the R-value, the more effective the insulation. Batt insulation is available in a range of R-values, depending on the thickness and type of material.
  •         Health and safety: Fiberglass insulation and rock wool batt insulation can release small particles or fibers that can irritate the eyes, skin, and respiratory system, so it’s important to wear protective clothing and equipment when handling and installing the insulation. Additionally, older batt insulation may contain harmful chemicals such as formaldehyde. Make sure to check the product’s safety information before installation or hire a professional to do the work.
  •         Moisture: Batt insulation material is susceptible to moisture damage, which can reduce its effectiveness and promote the growth of mold and mildew. Proper ventilation and moisture barriers are essential to prevent moisture buildup in the insulation.
  •         Fire resistance: Some batt insulation products are treated with fire-resistant chemicals to reduce the risk of fire. However, these chemicals can be harmful if released into the air, so it’s important to choose products that have been tested and approved for safety.
  •         Installation: Batt insulation is relatively easy to install, and is typically installed between the studs or joists in walls, floors, or ceilings. However, proper installation is important to ensure that the insulation is effective and does not leave gaps or voids that can reduce its insulating properties.
  •         Cost: Batt insulation is generally less expensive than other types of insulation, such as spray foam insulation, but it may require more frequent replacement or maintenance.

While fiberglass batt insulation is the most common type of attic insulation, other types of insulation, such as blown-in cellulose (or loose fill insulation) and spray insulation foam, may be more effective in certain situations. To make certain you are getting the best, most effective insulation, consult with a professional first to determine your individual needs.

If you’re considering an insulation installation to replace or add insulation to your home, consult with the experts at Attic Construction, we have been serving the American Southwest for over a decade and can easily assess your current insulation level and condition and recommend the best insulation solution to keep you and your family comfortable all year round. 

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Written By Joseph Sheiner

Joseph Sheiner is a construction industry professional with over 15 years of experience. He began his career in the insulation industry in 2012, and co-founded Attic Construction Inc in 2013. As CEO of the company, Joe oversees all operations and is in charge of training and product knowledge.

Under Joe’s leadership, Attic Construction has become the largest leading Attic Restoration Company in San Diego, Orange County and Phoenix. He has personally performed and supervised insulation work in over 7000 homes. He is certified by Owens Corning as a CEE (Certified Energy Expert) and is a licensed contractor by the CSLB.
Most recently, Joe has helped expand Attic Construction to two additional locations – Orange County and Phoenix. He is currently working on expanding to additional locations in the near future.

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Great work! Our attic went from totally disgusting to pristine.  They are courteous and professional and clean up after themselves.

-Karen L. Santee, CA

Andrew was very informative and helpful during the whole process. Excellent communication and his team did a great job. He came on Sunday and the work was done and completed by Tuesday. Highly recommend to anyone who is looking for a fair prices and great service.

– Joey E. San Diego, CA