How Much Does Internal Wall Insulation Cost

How Much Does Internal Wall Insulation Cost?

Find my local specialist...

Key Takeaways:

  • Average Cost of Internal Wall Insulation: The content provides a general cost estimate for internal wall insulation, stating that homeowners might pay between $0.50 and $1.25 per square foot on average.
  • Factors Influencing Insulation Costs: The content outlines key factors that influence the cost of internal wall insulation. These factors include the type of insulation material chosen (fiberglass, mineral wool, cellulose, or spray foam).
  • Considerations for Cost Estimation: Homeowners are advised to consider several aspects when estimating internal wall insulation costs. The type of insulation material selected should align with preferences and effectiveness, with fiberglass being a cost-effective option but less efficient.

Improving a home’s energy efficiency can be a smart investment. And one way you can do that is by insulating your home’s internal wall. Unfortunately, most homeowners are unaware of the internal wall insulation cost. If you’re one of them, don’t worry. 

Now, the question is, how much does internal wall insulation cost?

Internal wall insulation’s cost mainly depends on different things, such as the type of insulation material used, the size of your home, the property’s location, etc. 

However, on average, homeowners may have to pay between $0.50 and $1.25 per square foot for internal wall insulation. Installation costs can be offset over time by energy bill savings.

If you want to know more about the cost of internal wall insulation, stay with us by reading the entire blog.

Factors that Affect the Cost of Internal Wall Insulation

As we said earlier, internal wall insulation costs can vary depending on several factors. Here we’ve talked about some key factors that can affect the cost.

1. Insulation Material Types

The type of insulation material significantly influences internal wall insulation costs. Some common materials include fiberglass, mineral wool, cellulose, and spray foam. In general, fiberglass is the most affordable option but least effective at reducing heat transfer. 

Mineral wool, in contrast, costs more but has better insulation qualities and can withstand fires. Besides being eco-friendly, cellulose is manufactured from recycled paper, but it can be more expensive.

2. Insulation Area Size

The size of the area to be insulated will also play a role in the overall cost. For example, a larger area will need more materials and labour, increasing the cost. But a smaller area will have a lower cost. So, you should consider the size of your home when estimating internal wall insulation costs.

3. Installation method

The method of installation can also affect the cost. Some methods are more labour-intensive, which can increase the cost, while others are quicker and less expensive. For instance, if you prefer spray foam insulation, the cost will be higher because of the special equipment and training needed to install internal wall insulation.

4. Property Location

The property’s location can influence the cost of cavity wall insulation. If the property is located in a rural area, the cost will be lower because of the lower labour costs and less competition. However, if the property is located in an urban area, the cost will be higher for the higher labour costs and more competition.

5. Labor Costs And Contractor Fees

Contractor fees and labour costs can also affect the cost of insulation. A more experienced contractor will probably have higher fees. But you can ensure that they have a better track record and more knowledge of the installation process. 

On the other hand, a less experienced contractor may have lower fees but a less successful track record and less knowledge. So, consider the contractor’s fees and experience when estimating the insulation cost.

Get A FREE Quote Now

Get a no obligation FREE quote now. Our team is here to help. Take the first step towards a guaranteed solution by filling out our form below. 

uk trademan
contractor working for internal wall insulaton

How Much Does Internal Wall Insulation Cost?

Internal wall insulation is an effective way to make any home more comfortable and energy efficient. But how much does it cost? Let’s explore this question in more detail.

  • Fiberglass Batting Insulation

Fiberglass insulation is a popular choice for internal wall insulation because of its affordability and ease of installation. Typically, fiberglass batting insulation costs approximately $0.88 to $1.64 per square foot. This type of insulation comes in pre-cut batts placed between the studs of your wall. 

This material is a cost-effective option for homeowners who want to improve the energy efficiency of their homes with less money. However, fiberglass batting insulation is not as effective as other materials in reducing heat transfer. 

This means that it may provide different energy savings than other types of insulation. Additionally, fiberglass can be itchy and uncomfortable to work with, posing a health risk if inhaled.

  • Spray Foam Insulation

This insulation is one of the most effective choices for reducing heat transfer, and it’s also one of the most expensive. Depending on the project, the approximate cost of spray foam insulation runs between $1,284 and $3,741

Due to the specialized equipment and training required for installation, the cost is high. Despite the higher cost, spray foam insulation offers several benefits. 

For example, it offers a tight air seal, reducing the air that can leak in and out of your home. This not only improves your home’s energy efficiency but also reduces drafts and improves indoor air quality.

  • Blown Cellulose Insulation

It is made from recycled paper which makes it environmentally friendly. In general, blown cellulose insulation costs around $1.00 to $1.50 per square foot. 

This type of insulation is blown into your internal walls using specialized equipment, filling in gaps and providing a layer of insulation. However, it’s not as effective at reducing heat transfer as spray foam insulation. 

Additionally, the installation process will be messy and time-consuming and require some patching and repairs to the internal/external walls after installation.

Also Read: What are the Damp Patches on my Walls After It Rains?

Comparison Of The Costs Of Different Types Of Insulation Materials

The type of insulation material used will play a significant role in the cost of insulation. Although fiberglass batting insulation is the most affordable option, it is more effective at reducing heat transfer than other materials. 

Spray foam insulation is more expensive but offers the best insulation properties and a tight air seal. Blown cellulose insulation is a cost-effective option that provides good insulation properties, but spray foam is more effective at reducing heat transfer. 

However, the best type of insulation for your home will depend on your specific needs and circumstances. When considering the cost of insulation, you should also consider the initial cost and the long-term benefits, such as improved energy efficiency and a more comfortable home.

benefit of internal wall insulation

Benefits of Internal Wall Insulation

Internal wall insulation is an increasingly popular way to improve your home’s energy efficiency. It can reduce your energy bills and make your home more comfortable year-round. Here are some of the key benefits of internal solid wall insulation.

Improved Energy Efficiency

Internal wall insulation is the easiest way to improve your home’s energy efficiency. This way, you can reduce the amount of heat that is lost through the walls. 

Your home will stay warm in the winter and cool in the summer, reducing the need for heating and cooling systems. It will lower your energy bills and reduce your carbon footprint.

Lower Energy Bills

The improved energy efficiency that comes with internal wall insulation can significantly impact your energy bills. By reducing the energy you need to heat and cool your home, you’ll be able to lower your monthly energy expenses. 

In many cases, the savings from lower energy bills can offset the cost of installing the insulation over time. Additionally, by reducing your energy consumption, you can conserve natural resources and reduce your carbon footprint.

Increased Comfort in the Home

Internal wall insulation can also increase comfort in your home. By reducing heat loss and preventing drafts, you’ll enjoy a more comfortable and stable indoor temperature. 

This will be especially beneficial during extreme weather conditions, such as hot or cold spots. Internal wall insulation also reduces noise transfer from room to room.

Better Soundproofing

Internal wall insulation improves the soundproofing of your home. This way, you can reduce the amount of sound that is transferred from room to room. 

It will be beneficial for homes in noisy areas, such as near busy roads or construction sites. Soundproofing can also reduce noise pollution from outside the home.

Improved Air Quality

You can also improve your indoor air quality with internal insulation. This will help to prevent the infiltration of pollutants and allergens into your home. 

Apart from reducing pollutants, you can reduce the risk of exposure to harmful substances. By controlling the flow of air, you’ll be able to ensure that your home is well-ventilated.

Get A FREE Quote Now

Get a no obligation FREE quote now. Our team is here to help. Take the first step towards a guaranteed solution by filling out our form below. 

uk trademan

Considerations Before Installing Internal Wall Insolation

When it comes to installing internal wall insulation, there are a few things to consider. Here we’ve talked about some important things to consider before installing internal wall insolation. 

  1. Building Regulations and Approvals: Before installing internal wall insulation, check if there are any building regulations or approvals that you need to obtain. Depending on your location, you may need to obtain a building permit or adhere to specific regulations regarding the type of wall insulation and method of installation that can be used.
  2. Cost-Benefit Analysis of Internal Wall Insulation: The cost-benefit analysis is another consideration before installing internal wall insulation. While internal wall insulation can offer significant savings on energy bills, the cost of installation can be substantial.
  3. Impact on the Appearance of the Home: Internal wall insulation can also impact the appearance of your home. The insulation of your stud wall may be visible, affecting the home’s overall aesthetic. The floor space also reduces, creating a slightly smaller area compared to before. If you opt for internal wall insulation, you’ll need to consider any changes in terms of the interior design of your home.
  4. Required Maintenance: You should also consider the required maintenance when installing internal wall insulation. Depending on the insulation type and installation method, some materials may require regular maintenance, such as cleaning or replacement.

FAQs – How Much Does Internal Wall Insulation Cost?


Here, we’ve talked about some commonly asked questions about the cost of internal wall insulars. We hope you will find the answer helpful. 

1. Does Internal Wall Insulation Cause Condensation?

Condensation can be an issue with internal wall insulation if not properly installed and ventilated. The insulation can trap moisture inside the wall, creating a humid environment that leads to mold growth and condensation. 

To avoid this, you have to ensure that the insulation is installed with proper ventilation to allow for the proper flow of air and the escape of moisture.

2. Will Interior Wall Insulation Provide Soundproofing?

Yes, interior wall insulation can provide some level of soundproofing by reducing the amount of noise that passes through the walls. The effectiveness of soundproofing depends on the type of insulation material used, the insulation’s thickness, and the installation method.

The rigid insulation boards used for interior wall insulation are designed to be more effective at blocking sound than standard fiberglass batt insulation. When installed properly, the rigid boards can block a significant amount of noise from passing through walls.

Additionally, adding additional layers of batting on top of the existing rigid board installation can help reduce noise even further.

3. Which Is Better Internal Or External Wall Insulation?

The choice between internal and external wall insulation depends on different factors, such as the type of construction, the accessibility of the cavity walls, and the desired outcome. Internal wall insulation is a good option for homes with solid walls, where insulating from the outside is impossible. 

External solid wall insulation is more effective in terms of energy efficiency, but external insulation can be more expensive and may alter the appearance of the building. In that case, you should seek professional advice to determine the best option for your specific needs and situation.

Final Verdicts

After reading this guide, it is clear how much internal wall insulation costs. The cost of insulation varies greatly depending on the size of the area to be insulated and the type of insulation material used. 

However, it is possible to find a range of suitable insulation materials for all budgets. Furthermore, by carefully considering the insulation materials and installation process, you can ensure that you are investing in a product that is suitable for your home.

Useful links:

Picture of Jake Fitzgerald - Damp Surveyor

Jake Fitzgerald - Damp Surveyor

Surveyor of Timber & Dampness in Buildings (CSTDB) & ( MRICS ) Chartered Quantity Surveyor

Jake is a qualified chartered quantity surveyor and experienced damp specialist with a unique skill set in thermal imaging. With a focus on effective solutions, Jake combines his expertise in quantity surveying and thermal imaging to accurately assess and address damp-related issues. He utilises advanced technology to identify hidden moisture sources and develop targeted strategies, ensuring comprehensive and cost-effective solutions for his clients. With a commitment to open communication and client satisfaction, Jake delivers cutting-edge solutions that tackle damp challenges head-on.

Connect with him on Linkedin...

Related Posts

Table of Contents

Need advice?

Talk to one of our experts:

Contact us Now

0300 373 7251

Claim your free Ebook!

Learn how to diagnose and control damp yourself with our all-in-one guide

Fill out your email below to receive your free ebook...

Our Services

advanced damp proofing vans

Quick Form

Fill in the form below and we will be in touch soon

Find us on Facebook

Advanced Damp LTD

Meet Your Damp Experts at Advanced Damp

Welcome to Advanced Damp, where we bring over 30 years of professional expertise in damp treatments to homes and businesses across the nation.

🛡️ 20-Year Property Maintenance Guarantee: Every service we offer comes with the assurance of a 20-year property maintenance guarantee, reflecting our commitment to quality and long-term customer satisfaction.

🤝 Ready to Assist You: Our damp specialists are just a call away, ready to offer their expert advice and tailored solutions for your property. Whether it's a residential space or a commercial establishment, we're here to ensure your environment remains damp-free and healthy.

📞 Contact Us for Expert Damp Solutions: Don't let damp issues linger. Reach out to the Advanced Damp team today for effective treatments and peace of mind.

"We have located a local Specialist in your area"

Please fill out our short form below and describe the problem you are having. We will be in touch very shortly.