Embarking on a construction project—whether it’s a single-family home or a multi-story office building—follows a similar process, albeit on different scales. Developers, whether residential or commercial, generally understand the importance of working with design professionals and contractors who have the
right expertise for the project at hand. Unfortunately, this is often overlooked in the private residential sector, even though it’s just as crucial to select professionals with the proper experience.
Finding architects, designers, engineers, and contractors with experience in wood-frame construction is relatively straightforward. However, the same cannot always be said for Insulated Concrete Form (ICF) construction.
Though ICF construction has gained popularity and recognition in recent years, it remains unfamiliar to many, and therefore carries with it some reservations. This doesn’t have to be the case. By involving professionals who are experienced in ICF construction from the start, homeowners can address these concerns and move forward with confidence.
Involving ICF-experienced architects, designers, engineers, and contractors early on establishes a sense of comfort throughout the project. These professionals will be familiar with available ICF products, both for vertical and horizontal elements, and know how to seamlessly integrate them into the design. Most architects and designers have preferred engineers they work with, and for good reason – these established relationships ensure smooth communication and collaboration. When an architect is tackling an ICF project for the first time, having the guidance and expertise of an ICF-experienced engineer can make a significant difference.
For first-time ICF designers or architects, the number and size of openings that can be achieved is a revelation. For example, a 6-inch concrete core in an ICF system can withstand shear forces of over 6,000 lbs. per foot—roughly eight times stronger than a single shear structural wood panel. This strength allows for larger openings, wider windows, and more expansive views than what’s achievable with
traditional wood-frame construction.
An ICF-experienced engineer will already have resolved potential conflicts in design details and coordination. They will possess an established library of ICF-specific details tailored to the project’s location, including those suited to high-wind or seismic areas. These engineers will also be well-versed in rebar spacing requirements, ensuring that critical specifications are met.
It’s essential to work with an ICF-experienced engineer who is familiar with the range of ICF products on the market. Products’ features vary like web spacing, block height, and other characteristics. Knowing which products are preferred by local contractors is also important, as this ensures smoother project execution with contractors who are familiar with the materials.
Another important consideration is the product’s availability in the project’s region. National brands typically have broad distribution networks, but during the COVID lockdowns, supply chain disruptions turned what used to be a two-week lead time into several weeks. Thankfully, these issues have largely been resolved.
The availability of materials is only one piece of the puzzle. The skill and reliability of the contractor are crucial. Here are a few key questions to consider:
- Do they stock the required materials? Running out of product mid-installation is a significant issue, especially if restocking could take weeks.
- Do they rent wall bracing? This is critical for the installation process.
- Are ICF specific accessory items like spray foam, foam guns, and ledger brackets available? These can be essential for the project’s progress.
- For owner-builders, do they offer training and support? If the homeowner is overseeing the project, this could make all the difference.
The project engineer will collaborate closely with the contractor, both during the design phase and after the permits are issued. The engineer’s concrete design submittal will be closely scrutinized during the plan check, so clear, detailed structural framing plans and notes are vital. Since building codes have specific requirements for concrete structures, an ICF-experienced engineer will be thoroughly familiar with these regulations and ensure compliance.
Effective communication between the engineer and the contractor (or owner-builder) is essential, especially after permits are issued. Clear, practical dialogue ensures that misunderstandings are minimized, and the engineer’s specialized knowledge of concrete design is communicated clearly to the contractor or homeowner.
In recent years, there has been growing interest in using concrete for the entire building envelope, including the roof, whether flat or pitched. An ICF-experienced engineer will be familiar with the various horizontal and pitched roofing systems and their applications. Roof pitch is a significant factor—above a 5:12 pitch, a top form is typically needed to prevent concrete from slumping down the slope.
Temporary shoring may also be required, and an ICF-experienced engineer will recognize this need and design an appropriate shoring system.
To summarize, involving professionals who have experience with ICF construction—from architects and engineers to contractors—provides significant benefits. The client gains peace of mind knowing they are working with informed experts who understand the nuances of ICF construction and are committed to
delivering a successful project.
