How To Insulate Fireplace Not In Use

How To Insulate Fireplace Not In Use

When not in use, fireplaces can draw in cold air. You can insulate your chimney. Not sure how? We can assist you! We looked into it for you and found ways to do it.

Depending on your preferences, there are numerous ways to insulate your fireplace. It can be plugged in and equipped with a chimney cowl, chimney doors, ceilings, and dampers.

We will review how to use the above insulation methods to keep cold air out of the chimney. Also, without a roaring fire, the appearance of a fireplace can be dull. Let us now discuss some decorating ideas. Then continue reading!

How to Insulate an Inactive Fireplace:

Insulate your fireplace to keep heat inside and save money on utility bills. It may also prevent cold air from escaping. Depending on your DIY skills and knowledge, these tasks can range from simple to difficult. Concentrate on the methods listed above, beginning with clogging the chimney.

Also, Read: Is It Safe To Use A Fireplace And An HVAC System At The Same Time?

Insert A Chimney “Pillow.”

The first method described is most likely the simplest. If you’ve ever heard of a clogged chimney, you’ve probably heard the term “chimney pillow.” Fireplace cushions prevent air and debris from entering your home through the cavity of your fireplace.

No, it’s not a soft pillow to rest your head on while sleeping. It looks like a pillow-shaped inflatable ball and is transparent in color. Multiple layers of treated trilaminate enable durability and other properties.

How To Measure For A Chimney Pillow:

Before you begin installing, you should learn how to obtain the proper size. Measure the length and depth of the space where you want to insert the pillow with a folding carpenter’s ruler. The ideal height is 6 inches, with no obstructions and no hardware in the way. It’s a place with more to offer.

Please see the measurements below to determine the proper size. You can purchase a size larger than you require. Installing Fireplace Cushions

The following are the easy steps for installing fireplace cushions:

  • Begin by filling the cushion halfway.
  • Insert the cushion-sizing measuring position into the combustion chamber.
  • Move it around to make sure it’s in the right place.
  • Once the tube is locked, blow into it until the cushion is fully inflated.
  • Push the hose inside to conceal it. To prevent cushion damage or shrinkage, ensure no sharp objects or edges are in the firebox.

Install A Chimney Cap:

The second option is to scale the roof. Chimney caps are designed to keep chimney openings safe. Prevents intrusion from the outside world, such as animals, snow, and rain.

You must find the correct size, just as you would for fireplace cushions. To do so, use a tape measure to measure the width and length of the chimney – use the diameter if the chimney is round. When shopping, don’t forget to take measurements for future reference.

Also, Read: Do I Need A Special Thermostat For Gas Fireplace?

What Is The Most Suitable Material For Chimney Lids?

You may also come across various materials. Price ranges are included:

  • Galvanized (least long-lasting) – $35-$200
  • Stainless steel (long-lasting and low-maintenance) – $50 to $500
  • Copper – $150 to $550 (corrosion resistant but requires regular maintenance)

If you’re looking for ideas, stainless steel is the most popular and best option. After you’ve decided on your material and cap, you can have it professionally installed or do it yourself (costs range from $75 to $1,000). This is how.

For A Single Fluorescence:

  • Climb onto the roof using the ladder.
  • Match the cap to the chimney.
  • Move slowly. The distance between the smoke outlet and the top of the cap should be at least 15 cm.
  • Install the cap with a screwdriver or drill and make sure the screws are tight.

For Multi-Flue:

  • Use a bristle brush to remove dirt and dust from the crown of multiple flues.
  • Use a cap to seal the chimney.
  • Locate all screw holes on the cap’s bottom.
  • From each cavity, drill a smaller hole than the crown screw.
  • First, remove the cap to seal the crown’s outer edge.
  • Replace the cap after ensuring that it is seated over the gasket and the holes are aligned.
  • Press down on the cap to secure it with the gasket.
  • Drill the screw and screw in the cap.

Design Ideas For Unused Fireplaces:

After you’ve insulated the chimney, you can move on to cleaning the area. Here are some designs created by homeowners themselves. They are sure to inspire your next home improvement project.

Secret Garden:

With a few green nature-themed paintings, you can finally have an oxygen-producing area in your home.

Lights And Trees:

It is also a good idea to fill the fireplace room with wood to keep the warmth. You can surround it with twinkling lights to simulate the glow of the yellow fire. The outside of the log can also be colored to add a playful touch or to match your theme.

The Wine Cellar:

If you don’t have enough space for your wine collection, you can convert your fireplace into a basement. Installing new items can help you save money while also maximizing unused space.

House of Animals:

It’s a great idea to convert an unused fireplace into a pet house! Your beloved pet can have a place in your home even if space is limited.


Some decorations and household accessories take up space in your home. Make your fireplace an oasis by strategically positioning it as a multifunctional hall. I’m no longer concerned with the basket.

Shelf for Books:

Make a shelf out of the fireplace and add chairs and a coffee table. Perhaps the lamp will work. So you’ve got your reading books in a place.


When not in use, there are several ways to insulate your fireplace. Install the chimney cowl, damper, and door, and use the chimney cushion to close the firebox. You can do it all if you have the necessary knowledge and skills. However, ensure that you have all the necessary tools and materials and the correct size.

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