When Do You Need to Replace Your Attic Insulation In Los Angeles?

Find out the lifespans of different attic insulations & when to replace them

Attic insulation is a crucial component of any home’s design. Insulation works as a way to maintain comfortable living temperatures within a structure by trapping or blocking hot or cold air depending on the season.

In the winter, attic insulation keeps the house warm, while in the summer, the insulation blocks heat and allows the air conditioner to work effectively, keeping the house cool and comfortable.

Homeowner's Guide to Attic Maintenance - Importance of Attic Cleaning

Due to the need for insulation in our daily lives, experts often recommend that inspections be carried out at least once a year.

Insulation can survive for decades if properly cared for, depending on the substance used. Some insulation materials are made from natural materials and will eventually degrade. Others are made of synthetic material and can last nearly a century before needing replacement.

Attic insulation

Loose-fill or batt insulation is usually installed in an attic. Loose-fill insulation is typically less expensive to install than batt insulation and provides better coverage when installed correctly.

To find out if you have enough insulation in your attic, measure the thickness of the insulation. If it’s less than the R-30 equivalent (about 10 to 13 inches), you could probably benefit from adding more.

 Before insulating, seal any air leaks and make roofing and other necessary repairs. If it is located in an air-conditioned part of the house, remember to also insulate and air-seal the access to your attic.

Insulate and air-seal knee walls (vertical walls with attic space directly behind them) in your home as well. Also, if you’re building a new home or remodeling, make sure any attic decks that provide additional storage space or a deck for a heating and/or cooling unit or hot water tank are raised above the ceiling joists, to allow space for adequate insulation.

If the air distribution system is not inside the conditioned space but inside the attic, rafter insulation will enclose the distribution system. Finally, if you live in a warm or hot climate, consider installing a radiant barrier on your attic rafters to reduce heat gain during the summer.

Common Lifespan of Different Attic Insulations

Depending on the type of insulation you choose for your attic space, how long the material will last will vary. There are insulating materials made from all kinds of components, both natural and synthetic.

Natural materials will inevitably degrade faster than synthetics, and some high-quality synthetic materials can last virtually indefinitely if handled with adequate care.

• Fiberglass insulation –

The actual lifespan of this commonly used attic insulation is 80 to 100 years. However, due to its construction with natural materials, the product will eventually lose effectiveness.

Fiberglass insulation generally needs to be replaced 15-20 years after its useful life, as it can easily become dirty, wet, moldy, and ineffective if there is a roof leak or water damage of any kind.

• Cellulose Insulation –

Made from recycled paper, this insulation does a spectacular job of keeping the temperature in your home controlled. With a lifespan that can last up to 30 years, it is an environmentally friendly and efficient option.

However, cellulose insulation rarely lasts its entire lifespan and probably needs to be replaced in half the time.

Being made from natural materials, insulation is vulnerable to water, mold, mildew, and pests. The fluffy nature of cellulose makes it an attractive nesting place, and once pests find a home within the insulation, it must be replaced.

• Spray Foam Insulation –

Spray foam is expanding foam insulation. It is pumped through a machine directly into the space that needs insulation, rapidly rising and spreading to fill small holes and cracks.

Composed of various types of polymers and types of polyurethane, it has the longest lifespan of household insulation.

Once the insulation is applied to walls, it can last virtually forever unless damaged. There are a few things that can damage spray foam, but a house fire or punctures in the insulation will require replacement.

It will never rot or degrade, and the hardened exterior of the foam, once it sets, deters pests. So, it won’t be infested by insects or animals.

Older Homes and Insulation: To Replace or Not to Replace

It is common to find old houses that retain their original insulation.

In the past, homeowners used whatever came to hand for insulation, such as pushing newspapers, bottles, cans, and old clothes up the walls and along the ceiling in an attempt to block out the cold.

When the right insulation materials were created, it was a big step forward for indoor comfort, but it also meant that people didn’t think so much about their insulation anymore. After all, there is always something to worry about.

When buying a home, inspections should tell you whether or not it’s time to replace the insulation. This may be influenced by a range of circumstances, including:

• Age of the insulating material.

• Presence of damp or unresolved roof leak.

• Presence of mold and mildew inside the attic or on the insulation.

• Cleaning of the insulating material. (Dust, dirt, etc.)

• Current R-value of the insulating material. (Calculated by material thickness.)


A professional attic insulation contractor will be able to determine all of these factors for you with a simple insulation inspection.

If you’re looking for an attic insulation contractor, Attic Wizard is the place to go! With years of experience and a network of highly qualified and specially trained insulation contractors, we are here for any insulation-related needs you may have. Get your attic properly insulated through Attic Wizard services in Los Angeles. Contact us if you want to get started.

Elizabeth John

Oliver James is a professional blogger, content marketer, traveler and entrepreneur. He's a full-time staff writer at zippyholidays, and he blogs about photography. Oliver is an avid reader of books, both fiction and non-fiction and enjoys reading about psychology, business, and self-development. You may Also Like: > cheap holidays > Residential Estimating Services

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