Welcome to our ultimate guide on retrofit wall insulation! If you're looking to improve the energy efficiency of your home and save on heating and cooling costs, retrofitting your walls with insulation is a smart choice. 

In this guide, we'll walk you through everything you need to know about retrofit wall insulation, from its benefits to the different types available. So, let's dive in!

Benefits of Retrofit Wall Insulation

Retrofitting your walls with insulation offers numerous benefits for both your wallet and the environment. Here are some key advantages:


  1. Energy Efficiency: One of the primary benefits of retrofit wall insulation is improved energy efficiency. By reducing heat transfer through walls, insulation helps your home maintain a comfortable temperature year-round. This means that you'll need to use less energy for heating and cooling, resulting in significant savings on your energy bills.


  1. Cost Savings Lowering your energy consumption through improved energy efficiency also translates into cost savings. While the initial investment in retrofit wall insulation may seem significant, it pays off over time through reduced heating and cooling costs. In fact, according to the U.S. Department of Energy, homeowners can save up to 20% on their energy bills by properly insulating their homes.


  1. Environmental Impact: Retrofitting your walls with insulation not only benefits your wallet but also the environment. By reducing the amount of energy needed to heat or cool your home, insulation helps lower greenhouse gas emissions. This plays a crucial role in mitigating climate change and creating a more sustainable future.


Types of Retrofit Wall Insulation

When it comes to retrofitting wall insulation, there are several types available. Each type has its own unique properties and suitability for different applications. Here are the most common ones:


  1. Fiberglass Batt Insulation: Fiberglass batts are one of the most popular choices for retrofit wall insulation. They are made of tiny glass fibres and come in pre-cut panels that fit between standard stud spacing. Fiberglass batts are known for their affordability and ease of installation. However, it's important to note that proper installation is key to achieving optimal performance.


  1. Blown-In Cellulose Insulation: Blown-in cellulose insulation is an eco-friendly option for retrofitting walls. It is made from recycled paper products treated with fire retardants. The loose fibres are blown into the wall cavities using special equipment. Blown-in cellulose insulation is known for its excellent thermal performance and ability to fill gaps and voids, providing a complete thermal barrier.


  1. Spray Foam Insulation: Spray foam insulation is a versatile option that provides excellent air sealing properties. It is ideal for hard-to-reach areas and can expand to fill gaps and cracks, creating a complete thermal barrier. Spray foam insulation is available in two types: open-cell and closed-cell. Open-cell spray foam is less dense and provides sound insulation, while closed-cell spray foam is denser and offers higher insulation value.


  1. Rigid Foam Insulation: Rigid foam insulation, also known as foam boards, is a durable and moisture-resistant option. It is commonly used for retrofitting exterior walls. Rigid foam insulation offers high insulation value and can help improve overall structural integrity. It is available in different thicknesses to meet specific insulation requirements.


Choosing the right type of retrofit wall insulation depends on factors such as the climate, budget, and specific needs of your home. Consulting with a professional contractor or energy auditor can help you make an informed decision.



Congratulations! You've now gained a comprehensive understanding of retrofit wall insulation and its benefits. By improving your home's energy efficiency through retrofitting, you'll not only enjoy cost savings but also contribute towards a greener future. Remember to assess your home's needs, choose the right type of insulation, and work with professionals for optimal results. So go ahead, make your home more comfortable while reducing your carbon footprint with retrofit wall insulation!