Skip to main content

A Guide to Wall Insulation: Which Type is Best for Your Home?


Wall insulation is an essential aspect of creating an energy-efficient and comfortable home environment. With various types of insulation available, it can be challenging to determine which one is best suited for your needs. A no-cost home energy assessment from Revise, Inc. can help qualifying homeowners determine if they need wall insulation improvements, and allow them access to Mass Save®’s generous rebates and financial incentives. 

By understanding the different types of wall insulation and considering key factors like cost-effectiveness and effectiveness in maintaining a consistent temperature within the home, homeowners can make informed decisions when choosing the most suitable option for their homes. With the help of Revise, Inc., homeowners can make their homes more comfortable and more energy efficient at the same time.


Why Insulate Walls?

Insulating walls is of utmost importance in maintaining a comfortable indoor environment and reducing energy consumption. By insulating walls, heat transfer is minimized, resulting in a more consistent and regulated temperature inside the home.

Weatherizing not only improves thermal comfort but also helps to reduce heating and cooling usage. Additionally, homeowners can take advantage of incentives provided by Mass Save® to offset the expenses associated with wall insulation and weatherization projects. Mass Save® offers qualified homeowners no-cost air sealing as well as generous rebates on recommended insulation improvements. All homeowners have to do to access this program is have a no-cost home energy assessment from Revise, Inc.


Importance of Insulation

Significantly reducing heat loss and improving energy efficiency, proper wall insulation plays a pivotal role in maintaining a comfortable indoor temperature.

Insulation refers to the process of adding a layer of material to walls that minimizes heat transfer between the interior and exterior environments. By creating a barrier, it prevents the escape of warm air during winter months and blocks the entry of hot air during summer months.

This not only enhances comfort levels but also reduces energy consumption and utility expenses. Various types of wall insulation exist, including batt insulation, blown-in insulation, foam board insulation, and spray foam insulation.

Each type has its own advantages and disadvantages based on factors such as cost, installation ease, effectiveness in different climates, and environmental impact. Careful consideration should be given to choosing the most suitable type for one’s home to maximize energy efficiency and achieve long-term savings.


Benefits of weatherizing

Enhancing energy efficiency and reducing utility expenses, weatherizing a home provides numerous benefits. Weatherizing involves sealing air leaks and adding insulation to the walls, attic, and other areas of the home. One popular option for wall insulation is spray foam insulation. This type of insulation material expands upon application, filling gaps and crevices to create an airtight seal.

By preventing air leakage, spray foam insulation effectively reduces heat transfer and improves energy efficiency. In addition to its energy-saving properties, spray foam insulation offers several advantages. It acts as a barrier against moisture infiltration, preventing mold growth and water damage. Its superior insulating qualities also contribute to noise reduction by blocking sound transmission between rooms or from outside sources.

Overall, weatherizing your home with spray foam insulation or other suitable materials is an excellent investment that not only saves money on utility expenses but also enhances comfort levels while reducing environmental impact through reduced energy consumption.


Mass Save® program incentives

The Mass Save® program offers a range of incentives to homeowners looking to improve the energy efficiency of their homes. One of the key areas where these incentives are provided is in wall insulation. Wall insulation plays a crucial role in reducing energy consumption and increasing home security by preventing air leakage and heat transfer.

The program encourages homeowners to improve their wall insulation as recommended by their home energy specialist during their home energy assessment by Revise, Inc. Their home energy specialist might recommend a number of different types of insulation, including polyurethane foam insulation. Polyurethane foam not only helps in reducing energy expenses but also enhances overall comfort by maintaining consistent indoor temperatures.

By providing incentives for wall insulation, the Mass Save® program aims to promote sustainable practices that benefit both homeowners and the environment, contributing towards a more energy-efficient future.


Types of Wall Insulation

One commonly used method of wall insulation is the use of batts or rolls made from fiberglass or mineral wool. These materials are typically installed between the wooden studs in a wall, providing thermal resistance and reducing heat transfer.

Another option for wall insulation is jacket insulation, which involves wrapping the exterior of a building with an insulating material such as foam boards or reflective barriers. This method helps to create an additional layer of insulation and can be particularly effective for concrete block walls.

It is also important to consider the inclusion of a vapor barrier, which prevents moisture from entering the insulated space and causing damage.

Foam insulation is another type commonly used in walls, providing excellent thermal resistance while also acting as an air barrier.


Fiberglass Insulation

Fiberglass insulation is a commonly used material for enhancing the thermal resistance of walls, as it effectively reduces heat transfer and provides an additional layer of insulation.

This type of insulation is made from tiny glass fibers that are bound together to create a dense blanket-like material.

Here are the key features and benefits of fiberglass insulation:

  • Excellent thermal performance: Fiberglass insulation has high R-values, which measure its ability to resist heat flow. This makes it an effective choice for improving energy efficiency in homes.
  • Fire-resistant: Fiberglass insulation is non-combustible and can help delay the spread of fire within a building.
  • Moisture-resistant: The structure of fiberglass allows it to repel moisture, preventing mold and mildew growth.
  • Cost-effective: Fiberglass insulation is relatively affordable compared to other types, making it accessible for homeowners on a budget.
  • Easy installation: It can be easily installed by professionals thanks to its lightweight nature.

Considering these factors, fiberglass insulation proves to be a reliable option when considering wall insulation for residential homes.


Cellulose Insulation

Cellulose insulation, derived from recycled paper and treated with fire-retardant chemicals, offers an eco-friendly alternative for homeowners aiming to improve the energy efficiency of their walls.

This type of insulation is commonly used in cavity wall construction and can also be applied as pipe insulation. Cellulose insulation consists of small fibers that are densely packed into wall cavities or blown-in using a spray foam technique.

Its high thermal resistance helps create a barrier against heat transfer, reducing energy consumption and providing better temperature control within the home. Additionally, cellulose insulation has excellent sound-absorbing properties, which can help reduce noise transmission between rooms.

It is important to note that proper installation is crucial for achieving maximum performance and longevity of cellulose insulation.

Overall, cellulose insulation provides an effective solution for homeowners looking to insulate their walls while minimizing environmental impact.


Spray Foam Insulation

Moving on from cellulose insulation, another option to consider for insulating your walls is spray foam insulation. Although Mass Save® doesn’t cover spray foam insulation upgrades, it is a great option to consider for improving your home’s energy efficiency.

Spray foam insulation is a popular choice due to its ability to provide superior thermal performance and air sealing properties. It is applied as a liquid that expands and hardens into a solid foam, effectively filling every nook and cranny in the wall cavities.

Spray foam insulation offers several advantages over other types of insulation. Firstly, it has a high R-value, meaning it provides excellent resistance to heat flow. Additionally, it forms an airtight seal, preventing air leakage which can lead to energy loss and drafts. This type of insulation also has sound-dampening qualities, reducing noise transmission through walls.

When considering spray foam insulation for your home’s walls, keep in mind that professional installation is recommended due to the specialized equipment required. It is important to ensure proper application for optimal performance and safety.

The use of spray foam insulation in wall construction offers homeowners an effective solution for achieving energy efficiency and comfort within their homes.


Rigid Foam Insulation

One alternative to consider for insulating walls is rigid foam insulation. Rigid foam insulation provides excellent thermal performance and can effectively reduce energy loss in a home. This type of insulation is commonly used in wall insulation projects due to its high insulating value and durability.

Rigid foam insulation is made from polystyrene or polyisocyanurate, which are both lightweight and resistant to moisture penetration. It is available in various thicknesses and can be easily cut to fit different wall cavities. The foam boards are typically installed between the exterior sheathing and the interior drywall, providing an additional layer of insulation that helps to prevent heat transfer through the walls.

Overall, rigid foam insulation offers a reliable solution for improving the energy efficiency of a home’s walls.


Mineral Wool Insulation

Moving on from the discussion of rigid foam insulation, we now turn our attention to another commonly used type of insulation: mineral wool insulation.

As part of our comprehensive guide to wall insulation, it is important to consider all available options. Mineral wool insulation is a versatile and effective choice for insulating walls and other areas in your home.

Made from rock or slag fibers, this type of insulation offers excellent thermal and acoustic properties. It can be installed in both new construction and existing buildings and is particularly well-suited for use in attics due to its ability to withstand high temperatures.

Additionally, mineral wool insulation is non-combustible and provides fire resistance, further enhancing its appeal as a reliable option for homeowners seeking optimal thermal efficiency and safety in their homes.


Reflective Insulation

Reflective insulation, characterized by its ability to reflect radiant heat, offers homeowners a practical and efficient solution for enhancing thermal performance in their homes.

This type of insulation is typically made up of a layer of shiny foil material, often aluminum, which acts as a radiant barrier. The foil reflects the heat back towards its source, preventing it from entering the living space.

Reflective insulation works by reducing the amount of heat transferred through radiation. It is particularly effective in hot climates where radiant heat gain is a major concern.

By installing reflective insulation in walls, homeowners can significantly reduce their reliance on air conditioning systems and lower energy consumption. However, it’s important to note that reflective insulation alone may not be sufficient for achieving optimal energy efficiency.

Therefore, it is recommended to consult with professionals or conduct thorough research before selecting the appropriate type of insulation for specific home requirements.


Factors to Consider

This discussion will focus on several key factors to consider when evaluating insulation options for your home.

Cost-effectiveness is an important consideration, as you want to choose insulation that provides the best return on investment in terms of energy savings over time.

Additionally, it is crucial to evaluate the existing insulation in your home to determine if any improvements or upgrades are necessary.

Lastly, it is worth considering rebates and incentives available for certain types of insulation, which can help reduce the overall cost of installation.


Cost-effective insulation options

Cost-effective insulation options can significantly reduce energy usage while keeping your home comfortable and environmentally friendly.

One such option is foam insulation, which is known for its high-insulating properties. Foam insulation creates an airtight seal that prevents heat transfer, making it an effective choice for reducing energy loss. Additionally, foam insulation can be used to insulate duct systems, further increasing energy efficiency and reducing heating and cooling usage.

Another cost-effective option is cellulose insulation. Made from recycled materials such as newspapers or cardboard, cellulose insulation provides good thermal resistance and effectively reduces air infiltration. It is also an eco-friendly choice due to its use of recycled materials.

By considering these cost-effective insulation options like foam and cellulose, homeowners can make informed decisions that not only save money but also contribute towards a more sustainable future.


Evaluation of existing insulation

One important aspect of home insulation that should not be overlooked is the evaluation of existing insulation. Before considering any new wall insulation options, it is crucial to assess the current state and effectiveness of the insulation already in place.

Evaluation allows homeowners to determine if their existing insulation meets desired standards and if improvements or replacements are necessary. The evaluation process involves inspecting various aspects of the existing insulation, such as its type, condition, and performance. Homeowners can schedule a no-cost home energy assessment with Revise, Inc. Revise, Inc. will send a home energy specialist to your home who will conduct a thorough inspection of your home to determine if your home is as energy efficient as possible. If they recommend you need updates or improvements to your home, you can access generous rebates and incentives from Mass Save®.

Different types of insulation have different lifespans and capabilities, so understanding what type is currently installed is essential for making informed decisions about potential upgrades. Additionally, evaluating the condition of the existing insulation helps identify any signs of deterioration or damage that may compromise its effectiveness.


Rebates and incentives available

Rebates and incentives available for homeowners looking to improve insulation in their homes can provide added financial benefits and encourage sustainable practices. These incentives aim to promote the installation of more energy-efficient home insulation, requiring less energy usage to heat and cool the house.


Cost and Budget

Considering the financial aspect of wall insulation, it is important to carefully evaluate the cost and budget implications before making a decision.

Insulation expenses can vary depending on factors such as the size of the area being insulated, the type of insulation material used, and the complexity of the installation process.

It is advisable to obtain quotes from an installer like Revise, Inc. to compare prices and ensure that you are getting a fair deal. When Revise, Inc. provides you with a home energy report after they conduct a home energy assessment, that will give qualifying homeowners access to Mass Save®’s generous rebates and financial incentives to improve their home’s energy efficiency. Not only will qualifying homeowners save money on the upgrade thanks to Mass Save®, but they will also save money in the long term by reducing their energy consumption.

It is crucial to take into account long-term savings when evaluating expenses. While some insulation materials may have higher upfront usage, they often provide greater energy efficiency and lower utility expenses in the long run.

Therefore, finding a balance between your budget constraints and desired insulation performance is essential in selecting the most suitable option for your home.


R-value and Thermal Performance

One important factor to evaluate when selecting insulation materials is their R-value and thermal performance. The R-value measures the ability of an insulation material to resist heat flow, with higher values indicating better insulation. It is crucial to choose a wall insulation type with a high R-value to ensure optimal thermal performance in your home.

The thermal performance refers to how well the insulation material can prevent heat transfer between the interior and exterior of a building, helping maintain a comfortable indoor temperature and reduce energy consumption. Different types of wall insulation have varying R-values and thermal performances, such as fiberglass batts, spray foam, cellulose, and rigid foam boards.

Understanding these values will help homeowners make informed decisions about which type of wall insulation is best suited for their specific needs.


Frequently Asked Questions:


1)  How long does wall insulation typically last?

Wall insulation typically lasts for several decades, with an average lifespan of around 40 to 80 years. However, the exact duration can vary depending on various factors such as the type of insulation material used, installation quality, and environmental conditions.

Proper maintenance and regular inspections can help identify any deterioration or damage to the insulation early on, ensuring its effectiveness over time. It is advisable to consult with professionals like Revise, Inc. for specific information regarding the longevity of different wall insulation types.


2)  Can wall insulation help reduce noise pollution?

Yes, wall insulation can help reduce noise pollution in homes. Insulation materials such as fiberglass, cellulose, and foam have sound-absorbing properties that can minimize the transmission of sound waves through walls. These materials are effective at reducing airborne noise from external sources like traffic or neighbors.

Additionally, insulation can also dampen internal noises, improving the overall acoustic environment within a home. Therefore, installing wall insulation is a viable solution for homeowners looking to mitigate noise pollution within their living spaces.


3)  Is it possible to install wall insulation myself, or should I hire a professional?

It is possible for homeowners to install wall insulation themselves, although hiring a professional is recommended for optimal results. Professionals possess the necessary expertise and equipment to ensure proper installation, reducing the risk of errors and potential energy inefficiency. Additionally, professionals can provide guidance on selecting the most suitable type of insulation for specific requirements.


4)  Are there any potential health risks associated with certain types of wall insulation?

There are potential health risks associated with certain types of wall insulation.

For instance, fiberglass insulation can cause skin and respiratory irritation if not handled properly.

It is important to follow safety guidelines and wear protective gear when installing these types of insulation.

Consulting with a professional installer or conducting thorough research is recommended to ensure the proper selection and safe installation of wall insulation materials.


5)  Can wall insulation help prevent mold and mildew growth?

Wall insulation can indeed help prevent the growth of mold and mildew in homes. By creating a barrier between the interior and exterior walls, insulation reduces condensation and moisture buildup, which are key factors in mold and mildew formation.

Additionally, certain types of insulation materials have moisture-resistant properties that further enhance their ability to inhibit mold growth. It is important for homeowners to choose insulation materials with these characteristics to effectively minimize the risk of mold and mildew development in their homes.



In conclusion, when it comes to choosing the best type of insulation for your home’s walls, it is important to consider factors such as cost, R-value, and thermal performance.

Fiberglass insulation is a popular and cost-effective option that provides good thermal resistance. Cellulose insulation offers excellent soundproofing and is environmentally friendly. Spray foam insulation, although not covered by any Mass Save® programs, provides superior air sealing properties but can be more expensive. Reflective insulation is ideal for hot climates as it reflects heat away from the house.

Ultimately, the best choice will depend on your specific needs and budget constraints. Having a no-cost home energy assessment from Revise, Inc. will open the doors to Mass Save®’s generous rebates and incentives on recommended wall insulation improvements for qualifying homeowners. 


Some restrictions apply and offers are subject to change or cancellation. Visit for full details.