Can You Put Insulation Over Concrete?

Can You Put Insulation Over Concrete?

Are you considering adding insulation to your concrete walls or floors but unsure if it’s possible? In this article, we will explore the feasibility and benefits of putting insulation over concrete surfaces. Whether you’re looking to improve energy efficiency, reduce noise transmission, or prevent moisture issues, we will provide you with all the information you need to make an informed decision.

Benefits of Putting Insulation Over Concrete

Improved Energy Efficiency

Putting insulation over concrete can significantly improve the energy efficiency of a building. Concrete is a poor insulator and can allow heat to escape or enter a space easily. By adding insulation, the building can better retain heat in the winter and stay cooler in the summer, reducing the reliance on heating and cooling systems and ultimately lowering energy bills.

Moisture Control

Concrete is porous and can absorb moisture, leading to issues such as mold growth and water damage. By adding insulation over concrete, you can create a barrier that helps control moisture levels and prevent water from seeping through. This can help maintain a healthier indoor environment and protect the structural integrity of the building.


In addition to improving energy efficiency and moisture control, putting insulation over concrete can also help with soundproofing. Insulation materials can absorb and dampen sound waves, reducing noise transfer between rooms or from outside sources. This can create a quieter and more comfortable living or working environment for occupants.

Types of Insulation Suitable for Concrete

When it comes to insulating concrete surfaces, there are several options available. Each type of insulation has its own benefits and considerations, so it’s important to choose the right one for your specific needs. Here are three common types of insulation suitable for concrete:

Spray Foam Insulation

Spray foam insulation is a popular choice for insulating concrete surfaces due to its excellent thermal performance and ability to fill gaps and cracks. It is applied as a liquid that expands and hardens into a solid foam, creating a seamless barrier against heat transfer. Spray foam insulation is versatile and can be used on both interior and exterior concrete walls.

Rigid Foam Insulation

Rigid foam insulation, also known as foam board insulation, is another great option for insulating concrete surfaces. It is lightweight, easy to install, and offers high levels of thermal resistance. Rigid foam insulation comes in various thicknesses and can be used in both above-grade and below-grade applications. It is important to properly seal the seams and edges of rigid foam insulation to prevent air leakage.

Fiberglass Insulation

Fiberglass insulation is a cost-effective option for insulating concrete surfaces. It is made from fine glass fibers and is available in batts or rolls. Fiberglass insulation is easy to install and offers good thermal performance. However, it is important to ensure proper ventilation when using fiberglass insulation to prevent moisture buildup.

In conclusion, there are several types of insulation suitable for concrete surfaces, each with its own unique characteristics. By choosing the right type of insulation for your specific needs, you can improve energy efficiency and create a more comfortable living or working environment.

Steps to Properly Insulate Concrete

When insulating concrete surfaces, it is important to follow the proper steps to ensure the effectiveness of the insulation. Here are the key steps to properly insulate concrete:

Surface Preparation

Before installing insulation over concrete, it is crucial to properly prepare the surface. This includes cleaning the concrete to remove any dirt, dust, or debris that could prevent the insulation from adhering properly. Additionally, any cracks or imperfections in the concrete should be repaired to ensure a smooth surface for the insulation installation.

Insulation Installation

Once the concrete surface is clean and smooth, the insulation can be installed. Depending on the type of insulation being used, it may need to be cut to fit the specific dimensions of the concrete surface. The insulation should be securely attached to the concrete to prevent any gaps or air pockets that could reduce its effectiveness.

Moisture Barrier

In addition to insulation, a moisture barrier should be installed over the concrete to prevent any moisture from seeping through and causing damage to the insulation. This barrier can help to protect the insulation from mold, mildew, and other moisture-related issues. It is important to choose a moisture barrier that is compatible with the insulation being used and to ensure that it is properly sealed to the concrete surface.

By following these steps to properly insulate concrete, you can help to improve the energy efficiency and comfort of your space while also protecting the insulation from potential damage.

In conclusion, adding insulation over concrete can be a beneficial solution for improving energy efficiency and reducing heat loss in a building. By choosing the right type of insulation material and proper installation techniques, it is possible to create a more comfortable and sustainable living or working environment. However, it is important to consider factors such as moisture control and structural integrity when deciding to add insulation over concrete. Consulting with a professional contractor or insulation specialist can help ensure the best results for your specific needs.