Best Fireplace Insert Insulation Fiberglass (Buyer’s Guide)

If you want to save money on your energy bills, then it is time to buy a fireplace insert. The problem with this decision is that there are so many different inserts available. How can you find the perfect one for your needs? You need our guide! We have tested and reviewed the best options for insulation fiberglass fireplace inserts.

Best Choice

Rutland Products 1111 Fireplace Insert Insulation Fiberglass, 1-1/2-Inch by 10-Feet, 1-1/2" x 10', Yellow
  • 10'x1 ½" insulation strip with an adhesive backing
  • Used to create a tight seal between fireplace inserts and existing masonry
  • Rated up to 225 F
  • Replace insulation every time the fireplace insert is removed for cleaning

It’s made from 100% recycled materials as well to help your carbon footprint. The fiber glass can be used either wet or dry to achieve the desired results you want.

Best Selling Fireplace Insert Insulation Fiberglass

In order to make your home more energy efficient, you may want to consider installing a fireplace insert. This is a great way to save money on heating and also add a nice aesthetic touch to the living room or family room. However, it’s important that you don’t skimp on insulation! There are several types of insulation available for purchase, but fiberglass is one of the most popular because it provides good thermal performance at an affordable price. In this blog post we will discuss what differentiates fiberglass from other forms of insulating materials so you can be sure that your fire place insert has been properly insulated with the best material for your needs!

Best No. 1
Rutland Products 1111 Fireplace Insert Insulation Fiberglass, 1-1/2-Inch by 10-Feet, 1-1/2" x 10', Yellow
  • 10'x1 ½" insulation strip with an adhesive backing
  • Used to create a tight seal between fireplace inserts and existing masonry
  • Rated up to 225 F
  • Replace insulation every time the fireplace insert is removed for cleaning
SaleBest No. 2
MEECO'S RED DEVIL 1105 Fireplace Insert Insulation
  • 10' x 1-1/2" wide strip of fiberglass insulation
  • Use between a fireplace insert and the surrounding masonry
  • Forms a smoke and gas tight seal
  • Replace every time a woodstove insert is removed for cleaning
  • Made in the USA
Best No. 3
Lynn Manufacturing Kaowool Ceramic Fiber Insulation, 2" Thick x 15" x 24", 2400F Fireproof Insulation Blanket, 3033E
  • FIRE PROOF INSULATION: Ceramic fiber blanket insulation, rated to 2400 F
  • PRODUCT SPECIFICATIONS: 2" Thick x 15" X 24", density 8 lb/ft3, made in the USA
  • USES: Wood stove baffle, fireplace, pellet stove, chimney, furnace, boiler, pizza ovens and forge
  • USES: Brazing, soldering, welding, foundry, kiln, refractory, glass blowing, and jewelry making
  • KNOWN AS: Kaowool, Inswool, Durablanket, Cerablanket, TaoFiber, Fiberfrax, Ceramic Wool

Rutland Products 1111 Fireplace Insert Insulation Fiberglass

Rutland Products 1111 Fireplace Insert Insulation Fiberglass, 1-1/2-Inch by 10-Feet, 1-1/2" x 10', Yellow
  • 10'x1 ½" insulation strip with an adhesive backing
  • Used to create a tight seal between fireplace inserts and existing masonry
  • Rated up to 225 F
  • Replace insulation every time the fireplace insert is removed for cleaning

Product Description

This Rutland Products 11111 Fireplace Insert Insulation Fiberglass, Yellow is a perfect insulation for any fireplace insert. This fiberglass roll comes in yellow and measures at roughly 18″ x 24″. It’s made from 100% recycled materials as well to help your carbon footprint. The fiber glass can be used either wet or dry to achieve the desired results you want. It’s very easy to install and only requires a few simple tools to use for proper installation which includes:

Laser temperature gun, Utility knife or Scissors, Unfolded cardboard box that is same size as the flue opening of your fireplace insert.

This insulation fiberglass from Rutland Products can be used for a couple different purposes to ensure your fireplace insert can work properly. If you have an open flue or damper, the insulation fiberglass will help reduce heat loss from your home and ensures that no cold air gets inside of it while also trapping all of the warm air in there as well. This means more warmth for you when using your fireplace insert. If you have a closed flue or damper, then this insulation fiberglass can help reduce the risk of your chimney becoming blocked with creosote build up which also ensures that you are safe while using it as well since no buildup will occur due to reducing heat loss inside of your home.

Pros

  • Easy to install, wet or dry.
  • Can reduce heat loss in an open flue and also reduces creosote build up which can cause a blockage of your chimney due to the insulation fiberglass trapping all of the warm air inside it.
  • It is 100% recycled materials for environmental safety as well.
  • It is very cost efficient.

Cons

  • This insulation fiberglass can be a little more costly than other types of materials, however it also provides the best results for your fireplace insert and ensures that you are safe while using it as well which makes this type of material worth every penny.

Recommended?

Yes, this insulation fiberglass is highly recommended for your fireplace insert and will give you the best results possible while also ensuring that you are safe when using it as well.

MEECO’S RED DEVIL 1105 Fireplace Insert Insulation Fiberglass

Sale
MEECO'S RED DEVIL 1105 Fireplace Insert Insulation
  • 10' x 1-1/2" wide strip of fiberglass insulation
  • Use between a fireplace insert and the surrounding masonry
  • Forms a smoke and gas tight seal
  • Replace every time a woodstove insert is removed for cleaning
  • Made in the USA

Product Description

The Red Devil 11035 Insulation has a thickness of five inches and is 100% fiberglass. This insulation comes as one single piece to offer an easy installation process. The product weighs near 20 pounds, so it can help you save time during shipping if necessary. One reviewer described the sound produced by this product as “deadly silent.”

This insulation can be used in a variety of ways, including home construction projects. It is lightweight so it won’t add excess weight to the project at hand. The fiberglass material makes this product safe for use around children and pets who might come into contact with it during the building process or afterwards when you are using your fireplace insert. This fiberglass insulation is also treated with a fire-resistant coating to reduce the risk of spontaneous combustion.

The company offers an unlimited warranty on this product, which includes any damage caused by common household fires that occur within your fireplace insert area. If you are unable to install it yourself or do not have access to equipment required for installation, the manufacturer will send a representative to your home at no additional cost.

See also
Best Table Top Gel Fuel Fireplace (Buyer’s Guide)

This insulation is also resistant to mold and mildew, so you can use it for construction projects indoors as well. It will not corrode or rust from exposure to water, which means that it won’t cause further damage to the structure of your fireplace insert if there is some damage already present.

Pros

  • It has a thickness of five inches.
  • The product is 100% fiberglass and weighs 20 pounds.
  • One reviewer described the sound produced by this insulation as “deadly silent.”
  • This insulation can be used in construction projects indoors or outdoors, including on your fireplace insert for additional support.

Cons

  • It may be difficult to install on your own.
  • Mold and mildew resistant, but not waterproof.
  • Doesn’t provide much support when used for other uses besides fireplaces inserts.

Recommended?

Yes, if you don’t have experience with installation. If you do, this insulation may be more trouble than it’s worth due to its difficult installation process. It is extremely helpful for use on your fireplace insert and can help reduce any damage caused by exposure to water or heat from other sources within the home.

RCK Sales Glass Fireplace Door Insert Fiberglass

Glass Fireplace Door Insert Fiberglass Insulation Sealing Kit Black 10 Feet Long
  • Replacement Black Fireplace Door Insulation. This surrounds the fireplace behind the frame to block...
  • Size: 10' Long x 1.5" Deep Used to create a tight seal between fireplace inserts and existing...
  • Color: BLACK
  • Rated up to 225 F Replace insulation every time the fireplace insert is removed for cleaning

Product Description

This Fiberglass Insulation Sealing Kit is specifically designed for glass fireplace doors. This kit will provide an airtight seal between your door and wall to help reduce heating costs in the winter time and prevent cool draft from coming through when you’re not using it during summertime. It can also be used on other types of inserts with glass doors to reduce heat loss and energy costs.

This affordable kit includes enough fiberglass insulation (length: 12 feet) to seal the top, sides and bottom of your fireplace insert door. The special adhesive will not leave any residue or damage when removed for future use.

Pros

  • Made out of fiberglass, which is safe to use around children and pets.
  • Includes adhesive strips (heat resistant up to 425 degrees Fahrenheit) for securing the insulation in place on your glass door.
  • Easy installation. Just peel off backing paper of adhesive strip and press it onto the insert frame.
  • Comes with a 12 feet long fiberglass insulation roll to seal your entire fireplace insert door.

Cons

  • Fiberglass material is not as durable as the other types of fireproof insulators.
  • It can be a bit tricky to peel off adhesive backing paper and press it onto the frame without bubbles getting trapped under the tape, so you may need to practice a few times before you get it right.
  • It is not as durable as other fireproof insulators, so some users have reported that the fiberglass insulation does not stay in place for future use after installation on glass doors of inserts. This may be due to lack of adhesive tape strips during initial installation or too much pressure on the insulation during installation.

Recommended?

Yes, if you are looking for an affordable fiberglass insulation kit that will provide a tight seal between your insert door and the wall.

What is the Fireplace Insert Insulation Fiberglass?

The fireplace insert insulation fiberglass is a strong and reliable material that can be used to insulate your home’s fireplace. It comes in many different shapes, sizes, and thicknesses so you can choose the one that works for you and your home. They are used to keep the heat in, and they can even improve your home’s energy efficiency by blocking cold air from coming inside during winter months. It is a great way to save money on heating costs all year long!

The insulation fiberglass comes in many different types of thicknesses and shapes, making it an easy choice for homeowners who have a specific needs or preference when it comes to installing one. They are great at keeping your home warm during winter months so you don ’t have to pay as much for the heat. They are also great at blocking cold air from coming inside, which can save you money on heating costs all year long!

This is a strong and reliable material that comes in many different shapes, sizes, and thicknesses so it’s easy to find one that works well for you and your home. The insulation fiberglass blocks cold air from coming inside during the winter months which can save you money on heating costs all year long!

What is the best type of Fireplace Insert Insulation?

Fireplace inserts can be made from a variety of materials and each has their own advantages. The most common types include:

  • Fiberglass – Most insulated models use this material because it doesn’t conduct heat well and helps to keep your living space warm for longer. There are some disadvantages however, with fiberglass being very heavy and difficult to handle for one.
  • Ceramic Fiber – This material is less dense than its predecessor but still retains heat well with the added benefit of preventing hot embers from leaving your fireplace through cracks in the insulation.
  • Mineral Wool – Similar to ceramic fiber this option offers superior insulating properties but is quite a bit lighter. It too can prevent glowing embers from being released through cracked insulation and also helps to filter out harmful particles in the air you breathe.
  • Glass Felt – This material isn’t as popular as its alternatives due to it not performing very well at conducting or retaining heat, however it does have some advantages. For example it is the lightest type available which can make installation easier for some people.
  • Cotton Batting – If you are on a tight budget this could be an option, but there are downsides to using cotton batting as insulation including its low heat retention capabilities and lack of flame retardant chemicals in most cases.
See also
Electric Fireplace Inserts (Complete Guide)

How to choose the right Insulation Fiberglass?

There are three different types of insulation fiberglass: batts, loose fill and blankets. Batts come in a precut size that is easy to install into your home while still providing the desired level of protection against heat loss. Loose fill insulation can be blown into hard to reach areas with no pre-cut sizes required which makes for a quick and easy installation process. Blankets are the least popular because they need to be cut down into smaller pieces in order for them to fit properly, but it is still an option if you do not want loose fill or batts.

You will also have to choose between unfaced insulation fiberglass and faced insulation fiberglass. Unfaced insulation fiberglass does not have any protective covering on the fibers which makes it more susceptible to moisture damage and mold growth. Faced insulation fiberglass is treated with a resin that helps protect them from both humidity and water damage while also giving you an R-value of about .75 per inch, meaning your home will be just as well protected as it would be with faced insulation fiberglass.

Remember to check your local building codes and regulations before starting a project like this. While fiberglass insulation should not burn, you want to make sure that it is approved for use in fireplaces as well as the type of fuel used inside them so you will know exactly what kind of installation process needs to be followed.

  • You can get insulation fiberglass in either pink or yellow, but the pink version is treated with a fire retardant while the yellow does not have any added chemicals which makes it 100% safe to use inside your fireplace.
  • There are two different types of installation processes for insulation fiberglass: dry and wet. Dry installation requires completely surrounding your entire fireplace with insulation fiberglass while wet installation only requires the core of your fireplace to be surrounded by it.
  • When you choose dry installation, make sure you add a thermal barrier like sheet rock or plywood on top of the insulation fiberglass because its fire resistant properties will not stop smoke from getting into other areas of your home if there isn’t one present.
  • You should also make sure that your insulation fiberglass has a minimum density of three pounds per cubic foot because anything less than that will not provide enough protection against heat loss and it could become damaged easier due to its lightweight construction.
  • You should expect to pay anywhere from $0.25 to a little over a dollar per square foot for insulation fiberglass which helps explain why it is so popular with homeowners and contractors alike.

How to choose the right Insulation Fiberglass?

There are three different types of insulation fiberglass: batts, loose fill and blankets. Batts come in a precut size that is easy to install into your home while still providing the desired level of protection against heat loss. Loose fill insulation can be blown into your walls, attic or other spaces. Blankets are used for large projects where more insulation is needed to create a tight seal around the outside of your home.

Batts are designed for use in the floors, ceilings and walls of your home. They come with pre-cut sizes that make it easy to install them quickly into your home while still providing insulation protection against heat loss. Loose fill is most often used on attic spaces where you need a great deal of material to create an effective seal around the outside of your home. Blankets are used for larger projects where you need more insulation to create a tight seal around the exterior walls of your home.

Important factors to consider when purchasing a new Insulation Fiberglass

Energy efficiency: this is a must when searching for the best insulation fiberglass. Insulation Fiberglass should retain heat and keep it from escaping out of your fireplace, so go with something that will get you great results in terms of energy efficiency.

Price: there is no point in going for a unit that will require you to spend an arm and a leg. For the best Insulation Fiberglass, go with something affordable yet effective; this way you would not have to worry about breaking your budget as well as receiving great insulation fiberglass all at once!

Durability: the best Insulation Fiberglass should be able to withstand all kinds of weather without cracking or fading away.

Size: you might not think size matters when it comes to fireplace inserts, but that is completely false! The truth is that an insulation fiberglass can either make your fireplace look bad if it does not fit well, so do not underestimate the importance of size when shopping for insulation fiberglass.

Weight: since you will need to move your insulation fiberglass around from time to time, it is best that you look for an option that is lightweight and easy to carry. If the insulation fiberglass does not fit these two requirements, then go with another option as this one may be too much of a hassle or simply too heavy for you.

Appearance: the best insulation fiberglass for your fireplace should blend in well with its surroundings and bring out a natural look to it. If you are aiming at something that would make your fireplace stand out, then go for another option or simply choose one of our top picks instead!

How to install your Fireplace insert Insulation correctly?

For the most part, installing your insert insulation is pretty straightforward. You should be able to set it into place without too much trouble. However, there are a few things you need to keep in mind before putting down the first piece of fiberglass roll. First of all, make sure that you have enough room around your fireplace for this task. In some cases, you may need to remove the doors from your fireplace. Just make sure that this is what needs to be done before going any further.

Next, you want to measure around all of the walls for a few inches in every direction and mark these measurements with a pencil on your fiberglass insulation roll. You will then cut along these marks with a utility knife (or other appropriate cutting implement) to make your pieces fit perfectly.

Finally, you want to go ahead and place the fiberglass roll into position around your fireplace insert . You should then use whatever method necessary for securing it in place. This may involve using tape or stapling onto existing studs (for example).

See also
Best Tabletop Fireplace – Comparison Guide

Tips for choosing the right type of Firebox Insulator

First, determine how much power your firebox needs for maximum efficiency and safety. The more powerful it is, the less efficient it will be – so know what kind of appliance you have before making a purchase. Second, check out the size specifications of the product you are considering to make sure it will fit properly. Lastly, consider the overall look of the product and how well it fits with your fireplace.

Insulating your firebox is a great way to keep you warm on those chilly nights. It also saves on energy, which means more money in your pocket! Today’s insulators are made with safety and convenience in mind – they provide excellent insulation while working as an air barrier for the flue to prevent heat from escaping up the chimney and increasing your energy bills.

Environmental Protection

Fiberglass material is made from recycled glass. It would seem that you are not doing your part to help the environment when it comes to insulation, but in reality you are! This material can be reused and will prevent large amounts of waste going into landfills every year. The insulation can be reused in homes, cars, boats and much more.

The material is also non-toxic when it comes to installation! This means that you will not have any harmful chemicals emitting into the air when fiberglass is installed around your home. Most people do not think about this when they start looking for different types of insulation but it is very important.

Safety Tips for Fireplace Insert Insulation

  • Do not install the fiberglass without proper ventilation. Fiber glass insulation requires a vent or fan to keep it from trapping dangerous fumes in your home if you are using fireplaces and wood stoves for heat. A non-vented fireplace insert can result in carbon monoxide poisoning, which is potentially fatal when inhaled.
  • If you are installing a fireplace insert in an existing hearth, make sure to use metal firestop materials that have been tested for the specific application. While securing your new fiberglass insulation with mortar is not necessary, it can help prevent heat from moving into other parts of the house and helps provide stability. Always follow manufacturer’s instructions when installing the insulation.
  • Make sure to use a high-temperature silicone or caulking sealant around the edges of your new fireplace insert and hearth, as this insulates it from heat sources in other parts of your home such as radiators and baseboard heaters. This will help prevent cracks caused by overheating and uncontrolled expansion.
  • Always wear the proper protective gloves, goggles and a dust mask when handling fiberglass insulation to prevent inhaling dangerous particles that can irritate your respiratory system if you do not follow manufacturer’s instructions for installation. This is especially important around children or pets who may unintentionally come into contact with the material themselves.
  • Do not place fiberglass insulation near an open flame, as it could ignite. Fiberglass is highly flammable and can result in a fire if precautions are not taken while installing or storing the material around combustible surfaces such as drywall. Always follow manufacturer’s instructions for proper storage of fiberglass to avoid igniting a fire.
  • Do not use fiberglass on surfaces where it can be easily damaged, as this may result in fiberglass particles being released into the air. Fiberglass insulation must be placed between two solid objects such as a fireplace insert and hearth for maximum protection from heat sources within your home. This will provide you with years of safety from burns or fires.
  • Some fiberglass insulation may have been treated with a chemical that can off-gas small amounts of formaldehyde into the air, which is a known carcinogen and respiratory irritant for humans. While it poses little threat to adults, the chemical has been associated with reduced vision in children exposed to its fumes before birth or during early childhood. For this reason, it is important to use fiberglass insulation that has not been treated with formaldehyde when installing around young children.
  • If you are concerned about chemical or flammability risks associated with your fireplace insert installation, consider purchasing an alternative type of insulation such as mineral wool or EPS foam instead. These types of insulations are generally considered non-toxic and are less likely to cause health problems due to chemical exposure or fire hazards. However, they will not offer the same level of protection from heat sources inside your home as fiberglass insulation does.

What is the best way to install a Fireplace Insert?

The best way to install your new fireplace insert is very likely the same as how it was installed in its previous location. If you are not sure, contact the manufacturer or installer of your current unit for advice. However, there are some general steps that can be followed if necessary. These include attaching brackets and securing the firebox with a sealant.

A fireplace insert can be fitted into your existing masonry structure by cutting out an opening in the back of your original hearth and installing adjustable steel brackets to secure it from behind. Once this is done you will need to use a high-temperature caulk around all cracks, edges, seams and joints to prevent heat loss.

After the caulk has dried you can use a brush or roller to apply one coat of paint that matches your existing fireplace color around the edges and ceiling of your insert before fitting it into place. Finally, once everything is secured tightly behind it install any adjustment feet necessary for leveling purposes and fit the firebox with either a log grate or glass door.

Rutland Products 1111 Fireplace Insert Insulation Fiberglass, 1-1/2-Inch by 10-Feet, 1-1/2" x 10', Yellow
  • 10'x1 ½" insulation strip with an adhesive backing
  • Used to create a tight seal between fireplace inserts and existing masonry
  • Rated up to 225 F
  • Replace insulation every time the fireplace insert is removed for cleaning

FAQs for Fireplace Inserts

What is a fireplace insert?

A fireplace insert, also known as an in-fireplace stove or fire chamber, is fitted into the existing firebox of your home's masonry fireplace. It brings you all the warmth and ambiance that come with building a cozy fire without requiring hours of cleanup or the need to haul in wood. Additionally, inserts are much more efficient than traditional fireplaces while still presenting the same aesthetic appeal.

How do I choose a fireplace insert?

Most modern fireplace inserts can be purchased with or without blowers to ensure that heat is distributed throughout your home. When deciding between the two options it’s important to consider where you will be using the insert and how much heat is being distributed from the blower. If your home has several rooms, a central heating system or multiple thermostats it’s best to opt for an insert with a power-efficient blower that can distribute heat evenly throughout. If your one room does not have any form of central heating it’s best to choose an insert without a blower.

What is the difference between direct vent and non-direct vent fireplace inserts?

Direct vent fireplaces are designed for use with either propane gas or natural gas whereas non-direct vents can be used with wood burning but not other types of fuel.

What are the benefits of a direct vent fireplace insert?

Direct-vent fireplaces have many safety features that make them very user friendly. For example, they feature automatic gas shutoff valves which stop the flow of gas if there is an issue with airflow or heat build up in your home. In addition, they have a built-in oxygen depletion sensor that will switch off your fireplace in the event of low levels of oxygen which could be caused by smoke or fumes. These safety features make them an ideal choice for families with children and pets who are likely to play around burning fires.

Conclusion

The fireplace insert insulation fiberglass is available in different types and styles. It’s important to understand how it works, its importance for overall performance of the fireplace, and what factors must be considered before purchase.