Which ICF block is the best?
- Jack Venhuizen
- Sep 15
- 3 min read
Updated: Sep 25
We are always asked the question, “Which ICF block is the best?” This question often sparks fierce debates among our crews and company. Over the years, we've learned that there isn't a single block that stands out as the best. Each has its strengths and weaknesses. Here, I’ll share insights on a few brands we frequently work with.
Understanding ICF Blocks
Nudura
Nudura features larger dimensions, which can speed up the installation process. It's a high-quality block, and the Tremco building line-up, along with their warranty on spray-on waterproofing, is impressive.
Amvic
Amvic has gained significant market share thanks to its smaller size and high availability. It’s an excellent choice for DIY projects. It truly shines in jobs requiring height (9’ plus) as it’s easy to handle on scaffolding.
SuperForm
SuperForm offers superior holding power. This block is tough, with tight web spacing and a smaller size. We find it to be a strong product, and it installs smoothly with minimal extra hardware.
Quadlock
Quadlock is ideal for those aiming for a higher R-Value. It’s unique because it allows you to "build-your-own-block," and its flat-pack design makes it highly shippable. Quadlock is a popular choice for passive-haus builds.
When you get lumber dropped off, do you ask what mill it's from?
ICF blocks serve as a forming system that holds concrete and provides insulation. Regardless of the brand, they all perform well. Just like you probably don’t inquire about the lumber mill, you should focus on the supplier offering superior service and expertise for your ICF block needs.
Choosing the Right Dealer
It all comes down to the same principle as choosing car or equipment dealers. Who's the dealer in your area? How's their service? Can they provide the technical know-how and installation advice you need? Be cautious of dealers lacking ICF experience. If you’re a homeowner, you might find yourself with blocks delivered and no guidance on how to proceed.
“It’s just LEGO!”
From conversations with homeowners, friends, and industry insiders, we’ve noticed that ICF sometimes gets a bad rap. Homeowners are often sold the line, “it’s just LEGO!” However, when the rubber meets the road, they quickly discover that this “LEGO” is much larger and more complex than the toys they played with as kids! In these situations, things can go sideways quickly, leading to costly mistakes.
Installing ICF is no different from installing traditionally formed basements. It may look simple, but the pressure and weight of concrete are significant. Overconfident first-timers can face injuries, screw-ups, and frustrating days. If you’re a homeowner or a first-time contractor, it’s crucial to find a local dealer of ICF blocks who can provide proper installation support and oversight.
Be wary of asking for "just a per block price."
Another essential point is the size difference among blocks. Be cautious about asking for "just a per block price." Each block has different dimensions, and this can lead to misleading pricing. Some blocks may cost more because they cover double the square footage!
Regardless of the block you choose, reach out to your local dealers. Ask for photos of jobs they’ve installed, how many years they’ve been working with ICF, and who can provide installation and technical advice. Ultimately, it comes down to your local salesman and ICF dealer. It may not be the block you initially wanted, but the support can make or break your project.
Our Commitment to You
At Vencon, we offer a service (for a fee) to assist with 1-2 course installations, concrete pour day help, and technical visits and consultations. We take pride in being able to sell any brand of ICF while also providing support at any level of installation difficulty.
For more advice and technical support, please contact Jack at jackv@vengroup.ca. We’re always happy to help and would love to guide you on your upcoming project. Remember, these are our opinions only. When you consult industry experts, you’ll find many differing views! There are plenty of opinionated ICF installers out there!
Please note that these are my opinions only and should not be taken as installation or structural advice. This post is not sponsored in any way by ANY ICF manufacturer. Consult your project engineer for any structural advice.
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