Common Insulation Mistakes To Avoid

Insulation is an essential part of any home’s environmental control system. It helps keep the house cool in the summer and warm in winter while lowering energy costs. Insulating a home correctly is not just about filling in walls and attics with fiberglass insulation. There are multiple insulation options and techniques available, and it’s important to know how each can impact your home’s performance. So before you start insulating your home, make sure you keep away from these common insulation mistakes.

Using the Wrong Type of Insulation Material

One of the most common mistakes homeowners make when insulating their homes is using the wrong type of insulation materials. Every type of insulation material has different R-values, installation techniques, and densities. For example, while fiberglass batt insulation is the go-to choice for most people, it might not be the best option for certain parts of a home. When insulating your attic, for example, spray foam insulation might be a better choice as it fills gaps and air leaks more effectively than batt insulation.

Ignoring Air Leaks

Air leaks are one of the biggest culprits of heat loss in a home, and ignoring them can cause your insulation efforts to become ineffective. Air leaks can occur around windows, doors, outlets, and even through walls and roofs. Ignoring these leaks can cause your insulation to get damp and condensation to occur, leading to mold growth, as well as increasing your energy bills.

To prevent air leaks, seal any gaps or holes using caulking or weatherstripping. For larger leaks, consider adding insulation foam to fill gaps and block airflow.

Poor Installation

Improper installation can make the best insulation materials worthless. It’s crucial to follow the manufacturer’s instructions carefully and pay attention to the recommended R-value. Poor installation can cause gaps and voids in the insulation, reducing its effectiveness and allowing air to bypass the insulation. Always make sure your insulation installation is done correctly to avoid future issues with your insulation.

Inadequate Insulation

Having insufficient insulation can cause your energy bills to skyrocket, as it allows heat to escape during the colder months and enter your home in the warmer months. It’s essential to ensure that you have adequate insulation, which varies based on where you live and your local climate conditions.

It’s recommended to insulate your attic to a minimum of R-38, with most walls requiring insulation to an R-13 or R-21 value. Keep in mind that insulation performance can degrade over time, so make sure to monitor and maintain your insulation regularly.

Covering Attic Vents With Insulation

The attic is one of the most important places to insulate in your home. And while insulating your attic is essential, it’s vital not to cover your attic vents with insulation. These vents are designed to provide proper ventilation and prevent moisture buildup in your attic, which can damage insulation and lead to mold growth.


Insulating your home correctly can help save energy and money. Knowing which materials to use, how much insulation you need, and how to install them correctly is critical. Avoid these common mistakes to ensure that your insulation provides the best performance for your home.

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