floor insulation south africa

Floor Insulation Price

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As a homeowner in South Africa, you may be wondering how to keep your home comfortable all year round while also reducing your energy bills. One often overlooked solution to this problem is floor insulation. In this article, we will explain why floor insulation is important, how to insulate your home’s floor, and the different types of floor insulation available in South Africa.

Why Floor Insulation is Important

Floor insulation is important for several reasons, including:

  • Energy Efficiency: Insulating floors helps to reduce heat loss through the floor, which can result in lower energy bills and greater energy efficiency. In colder climates, it can also make homes more comfortable by reducing cold drafts and improving overall warmth.
  • Noise Reduction: Insulating floors can also help to reduce noise transmission between floors, making homes quieter and more comfortable.
  • Moisture Control: Insulating floors can help to control moisture and condensation, which can lead to mold growth, rot, and other moisture-related problems.
  • Structural Integrity: Insulating floors can also help to protect the structural integrity of the building by reducing the risk of moisture damage and preventing heat loss that can cause freezing and thawing cycles, which can damage the foundation.
  • Environmental Benefits: Insulating floors can also have environmental benefits by reducing energy consumption and greenhouse gas emissions associated with heating and cooling homes.

It’s an important aspect of home insulation that can improve energy efficiency, comfort, and indoor air quality while also protecting the building’s structure and the environment.

Types of Floor Insulation in South Africa

There are several types of floor insulation available, each with its own unique properties and benefits. One common type is batt insulation, which is made of fiberglass or mineral wool and is installed in between the floor joists. It is easy to install and provides good thermal and sound insulation.

Another type is rigid board insulation, such as polystyrene foam board insulation, which is lightweight, durable, and commonly used to insulate concrete slab floors. Loose-fill insulation, such as cellulose insulation made from recycled paper or blown-in fiberglass, can also be used to insulate floors. Spray foam insulation, such as polyurethane foam, is applied as a liquid that expands to fill gaps and provides excellent air sealing and thermal insulation.

1. Fibreglass

Fibreglass is one of the most commonly used types of floor insulation in South Africa. It is made from fine glass fibers and is available in batts or roll form. Its relatively inexpensive and easy to install, making it a popular choice for homeowners.

2. Mineral Wool

Mineral wool floor insulation is a type of insulation material made from rock or slag fibers that is used to insulate floors. It is commonly used in homes with wooden floors, as well as in commercial and industrial buildings. It provides good thermal insulation, which helps to reduce heat loss through the floor and improve energy efficiency. It also has good sound insulation properties, which can help to reduce noise transmission between floors and make buildings more comfortable.

3. Cellulose

Cellulose is installed by blowing it into the space between the floor joists from below the floor. It is relatively inexpensive, easy to install, and has a decent R-value, which means it provides good thermal resistance.

4. Polystyrene

Polystyrene insulation is a popular choice for floor insulation because it is lightweight and easy to install. It is available in rigid board form and provides good insulation properties. However, it is important to note that polystyrene insulation can be flammable and may emit toxic fumes when burned.

5. Polyurethane

Polyurethane foam insulation is a spray-applied insulation that expands to fill gaps and crevices. It provides excellent insulation properties and can be used in areas where other types of insulation may not be suitable. However, it is more expensive than other types of insulation and requires professional installation.

How to Insulate Your Home’s Floor

DIY vs Professional Installation

While it is possible to insulate your home’s floor as a DIY project, it is often best to leave it to the professionals. A professional installation will ensure that the insulation is installed correctly and to the right R-value (a measure of insulation effectiveness). This will also give you peace of mind that the job has been done properly.


Before installing floor insulation, it is important to ensure that your home’s floors are clean and free from any debris or moisture. Any holes or gaps in the floor should also be filled to prevent air leaks.

Installation Process

The installation process for floor insulation varies depending on the type of insulation being used. However, in general, the insulation is laid on top of the existing floor and covered with a layer of plywood or other flooring material. The insulation should be installed to the recommended R-value for your area.

Cost and ROI

The cost of floor insulation in South Africa depends on a variety of factors, such as the size of your home and the type of insulation being used. However, the cost can be offset by the savings on your energy bills. According to the Insulation Association of Southern Africa (IASA), insulating your home’s floors can lead to energy savings of up to 15%.

Choosing the Right Floor Insulation for Your Home

When choosing floor insulation for your home, there are several factors to consider.

  • Climate and Environmental Conditions: The climate and environmental conditions in your area should be taken into account when choosing floor insulation. For example, in colder regions, thicker insulation with a higher R-value may be required to keep your home warm during winter.
  • Type of Flooring: The type of flooring in your home should also be considered when choosing insulation. Some types of insulation, such as polyurethane foam, may not be suitable for certain types of flooring.
  • Budget: Your budget is another important factor to consider. While some types of insulation may be more expensive, they may also provide better insulation properties and a higher ROI in the long run.
  • Moisture and Water Resistance: If your home is located in a wet or humid area, it is important to choose insulation that is moisture and water-resistant to prevent mold and mildew growth.


Floor insulation is an important investment for any homeowner in South Africa looking to improve energy efficiency, comfort, and soundproofing in their home. With a variety of insulation options available, it is important to consider factors such as climate, type of flooring, budget, and moisture resistance when choosing the right insulation for your home.


How much can I expect to save on my energy bills?

According to the Insulation Association of Southern Africa (IASA), it can lead to energy savings of up to 15%.

Is one type of insulation better than the others?

The best type depends on several factors, such as climate, type of flooring, and budget. It is important to consider these factors when choosing the right product for your home.

floor insulation materials south africa

Floor Insulation Price

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