How to Keep Your Attic Warm in the Winter

Neglecting your attic during the coldest months of the year is not a good idea, as it can affect how you heat the rest of the house. 

Keeping your attic space warm with proper insulation will help keep your energy bills low and protect your home from freezing temperatures.

You do not have to use heating equipment to increase attic temperatures. Instead, turn to insulation like fiberglass, spray foam, and cellulose insulation to keep your attic space toasty.

Below, we go into more detail about fixing poor insulation to keep your home safe during the winter months.

attic in the winter

Should My Attic Be Cold in the Winter?

Heat naturally rises, so you would think that the attic should always be warmer than other parts of your house. 

In reality, an attic can also get super cold during winter, and these freezing temperatures can damage your home

One of the best ways to keep your attic at least somewhat warm during the coldest months of the year is to insulate it properly. Many experts would agree that high-quality insulation is the best way to go, but we’ll also list other methods of warming up your attic.

How to Insulate Your Attic in the Winter

insulating attic in the winter

Insulating your attic walls will go a long way when it comes to keeping warmth in. You can leave the insulation exposed if your attic space is only meant for storage. However, it is better to cover attic insulation with drywall for safety and appearance.

One of the most important things to know when choosing attic insulation is its R-value. This metric indicates how resistant insulation is against extremely icy temperatures. Basically, the higher the R-value of insulation, the better it is for keeping out the cold.

Keep in mind that the R-value you require depends on your local weather. Hot climates generally don’t need a high R-value. 

Some good options to consider for keeping your attic space comfortable and warming up your home are fiberglass batt insulation, cellulose insulation, and spray foam insulation.

Fiberglass Batt Insulation

Even if you have never installed insulation before, you are probably familiar with fiberglass batt insulation. This is one of the most popular types of insulation and looks just like cotton candy.

Two things that make fiberglass batt insulation one of the most commonly used are how cheap it is and the fact it has an excellent R-value. Some of the benefits of fiberglass insulation are:

  •    Lower power consumption for heating and air conditioning
  •    High longevity since it resists rotting
  •    Protection from mold and pests
  •    Straightforward installation
  •    Fire resistance 

Cellulose Insulation

Cellulose insulation is more efficient than fiberglass despite a lower R-value. But it is slightly more expensive. This type of insulation is ideal not just for walls but for ceilings as well. Advantages that come with cellulose insulation include:

  •    Made from recycled materials, so it is more friendly for the environment
  •    More resistant against fire than fiberglass insulation
  •    Reduces wind washing

Spray Foam Insulation

Spray foam insulation is sold as a liquid. Once sprayed, the liquid solution thickens and becomes a durable foam. 

This insulation effectively fills gaps, making an airtight seal that keeps heat from escaping. Some of the best advantages to using spray foam insulation for your attic space include:

  •    High energy efficiency because the foam fills all gaps where heat could escape
  •    Increases a home’s structural support
  •    No vapor barrier

Other Ways to Keep your Attic Warm in the Winter

attic roof during winter

Adding insulation to your attic can certainly warm up your residence during the winter, but there are a few other methods you can try to make this happen:

Ventilate Your Attic

Knowing how to ventilate your attic during the winter will help protect your home and keep heating costs low. You can use attic fans and vents to better ventilate your attic.

Good attic ventilation is also essential to keep cooling costs down when summer comes. However, during the winter, ventilation in your attic helps keep moisture at bay. 

Moisture in your attic can significantly affect how warm it is and lead to mold and mildew. These growths can damage any belongings you store in there.

Use Attic Window Coverings

attic window covering

According to the U.S. Department of Energy, using window coverings such as plastic film applied directly to glass, shutters, and storm windows can improve energy efficiency. This can help keep your attic warm during the winter and cool during the summer.


Insulation is the best way to keep your attic warm in the winter. However, adequate ventilation and window coverings can also help you seal the attic. No matter which method you choose, be sure to get started long before winter arrives