Sustainable Building: Advantages of Insulating Concrete Forms (ICFs) for Energy Efficiency and Comfortable Living Spaces

When Joe and and Leslie Beahm decided they wanted to build a home with ICFs (Insulating Concrete Forms) to get a well-insulated home that uses less energy for heating and cooling, they came to HomeWrights Custom Homes for direction.

An energy efficient home using ICFs requires a tight envelope around the structure. A heat pump is also recommended to help achieve these efficiency goals. The Beahms opted to build their multi-use RV, single car, shop, and living-space-garage first and then build their custom home at a later date on the same site. The Beahms used HomeWrights’ Owner-Builder process to help keep building costs low.

Sustainable Building Strategy

See the quick video with a view of the Beahm’s building site and phase one with the garage/shop/living space.

With this building strategy, they can be on-site for the build of the home, keep living costs lower during construction and eliminate moving expenses as well as keeping a close eye on the project. Joe and Leslie are very organized and active in this project and enjoy doing many of the finishes themselves as Owner-Builders.

“Green building” can cost more than traditional building practices so acting as one’s own general contractor through the Owner-Builder program by HomeWrights will substantially lower building costs.

Sustainable Building – Fundamentals of ICF and SIP

If you are considering ICF or SIP as part of your sustainable building strategy, here are the fundamentals you should understand. HomeWrights Custom Homes is passionate about sustainable building and excited to delve into the advantages of ICFs and how they can create a comfortable home that is energy efficient and friendly to our sensitive Colorado environment.

1. Unmatched Insulation and Energy Efficiency

ICFs excel in thermal insulation, often surpassing traditional construction methods. These forms comprise interlocking panels, typically made of expanded polystyrene (EPS) or other insulating materials, which are stacked and filled with concrete. This unique combination creates a solid, continuous thermal barrier that dramatically reduces heat transfer.

The insulation properties of ICFs result in reduced energy consumption for heating and cooling. By minimizing thermal bridging, which refers to the transfer of heat through structural elements, ICFs maintain a stable and comfortable indoor temperature year-round. This translates into lower energy bills and less reliance on heating and cooling systems, promoting a greener and more sustainable lifestyle.

Sustainable building requires significant planning and some specialized skills for proper construction. HomeWrights has experience with both ICF and SIP building techniques. See more on SIP building systems below.

Related article: Is an Energy Recovery Ventilator System Right For Your New Custom Home?

2. Environmental Benefits

ICFs champion environmental stewardship by minimizing the ecological footprint of buildings. The use of recycled materials in ICF production, such as EPS, reduces the demand for virgin resources and diverts waste from landfills. Additionally, ICFs require less energy to manufacture than traditional building materials, further reducing their environmental impact.

Moreover, the durability and longevity of ICF structures contribute to sustainability. These buildings exhibit excellent resistance to natural disasters, including fire, wind, and earthquakes, thereby reducing the need for repairs or reconstruction.

“Although ICFs require a higher initial investment, their long-term cost savings make them a financially attractive option.”

3. Financial Advantages

Although ICFs require a higher initial investment, their long-term cost savings make them a financially attractive option. The outstanding insulation properties of ICFs lead to reduced heating and cooling expenses, resulting in significant energy savings over the structure’s lifetime. HomeWrights has the experience to show homeowners how they can enjoy reduced utility bills and a faster return on their initial investment.

4. Comfortable Living Spaces

One of the key advantages of ICFs lies in the creation of comfortable living environments. The exceptional insulation properties of ICFs eliminate drafts, cold spots, and temperature fluctuations commonly experienced in traditional construction. The result is a more consistent indoor temperature, enhanced acoustic insulation, and improved air quality due to reduced infiltration of outside pollutants.

The thermal mass of the concrete within the ICF walls helps regulate temperature fluctuations by absorbing and slowly releasing heat, creating a comfortable and stable living environment. Additionally, the solid construction of ICFs minimizes noise transmission, offering residents a quieter and more peaceful living space.


The numerous advantages of ICFs, including superior insulation, reduced environmental impact, significant cost savings, and the creation of comfortable living spaces, make them a compelling choice for sustainable building.

With the remarkable insulation properties of ICFs and their ability to create comfortable living spaces, it is clear that this construction practice aligns perfectly with sustainable building principles. Embracing ICFs is not only a step towards a more energy-efficient future but also a commitment to a greener, more affordable, and comfortable living space for generations to come.


Structural Insulated Panels (SIPs) and Insulating Concrete Forms (ICFs) are both popular construction techniques used to enhance energy efficiency and sustainability in homes.

SIPs are pre-fabricated building components composed of rigid foam insulation sandwiched between two structural panels, usually made of oriented strand board (OSB).

These panels provide excellent thermal insulation, creating a continuous barrier that minimizes air leakage and thermal bridging. The airtight construction of SIPs significantly reduces energy consumption for heating and cooling, resulting in lower utility bills and a smaller carbon footprint. SIPs are known for their quick and efficient installation, allowing for faster construction timelines. They offer versatility in design and can be used for walls, roofs, and floors, providing a well-insulated building envelope.

On the other hand, ICFs consist of interlocking panels or blocks made of insulating materials, such as expanded polystyrene (EPS), which are stacked and filled with concrete. The combination of insulation and concrete forms a durable and highly insulated wall system.

ICFs offer excellent thermal resistance, reducing heat transfer and providing energy-efficient homes. Additionally, the solid construction of ICFs results in enhanced durability, fire resistance, and sound insulation. While SIPs and ICFs share the common goal of improving energy efficiency, there are some differences between the two approaches. SIPs excel in providing a highly insulated and airtight building envelope, offering efficient thermal performance.

They are lightweight and offer design flexibility, but their load-bearing capacity is typically limited, requiring additional structural support. ICFs, on the other hand, provide not only excellent insulation but also structural strength, making them suitable for high-performance, resilient buildings.

SIPs offer efficient insulation and ease of installation, while ICFs provide both insulation and structural integrity. The choice between SIPs and ICFs depends on factors such as the project’s requirements, design preferences, and the desired balance between insulation and structural capabilities.

HomeWrights has utilized both of these sustainable building techniques for clients in Colorado.  Both approaches contribute to energy efficiency and sustainable construction practices, allowing homeowners to create comfortable and environmentally friendly living spaces. If you have questions about sustainable building and construction techniques please give HomeWrights a call!

Why HomeWrights Custom Homes? 

Every custom home is unique and HomeWright’s has a team of professional builders to partner with you as you build wealth for your future by acting as your own custom home builder.

Whether you’re taking advantage of our Owner-Builder process or our Turnkey approach to building your custom home, recognizing the importance of setting goals and having clear intentions will make that journey towards your dream home a lot smoother! 

Call: 303-756-8870

We have representatives in Boulder, Colorado Springs, Denver, Fort Collins, and Pueblo areas. We’re happy to meet at your home, our office, or virtually.