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Logix ICF

Insulated Concrete Forms

Absolute General Contractors is a certified LOGIX ™ installer and as ICF construction is becoming a commonplace for both low rise commercial and high performance residential construction, more stringent energy efficiency and natural disaster resistant building codes are being adopted.

Insulating concrete form or insulated concrete form (ICF) is a system of form-work for reinforced concrete usually made with a rigid thermal insulation that stays in place as a permanent interior and exterior substrate for walls, floors, and roofs. The forms are interlocking modular units that are dry-stacked (without mortar) and filled with concrete. The units lock together somewhat like Lego bricks and create a form for the structural walls or floors of a building.

See the thermal imaging below, comparing the conventional construction compared to LOGIX™ ICF system. Purple and blue representing no heat loss, compared to orange and yellow, large heat loss.
Logix ICF
Thermal Insulation
Energy Efficiency
Structural Integrity
Acoustic Insulation
How well do ICF walls hold up in a fire?

In “firewall” tests ICF walls were subjected to continuous gas flames and temperatures of up to 2,000°F for as long as four hours. None of the ICF walls ever failed structurally, in contrast to wood-frame walls, which typically collapse in one hour or less.

In one step, the lower level is poured, framed, and insulated all the way up to the floor joists, even throughout daylight and walk out areas; eliminating the need for any work before the sub-floor can be installed.

Won’t the foam burn or give off harmful emissions?

The foams in ICFs are manufactured with flame-retardant additives. The National Research Council reviewed the numerous existing studies of fire emissions and concluded that the emissions from polystyrene foams are no more toxic than those of typical softwoods used in home construction.

What is the difference between an ICF wall and a wood frame wall?

An ICF concrete wall is stronger, more soundproof, more resistant to natural disasters, rot, and termites, better insulated (superior R-value) and, therefore, more energy efficient; it reduces air infiltration and benefits from the thermal mass of the concrete keeping inside temperatures more even.

ICF protects the concrete from freezing or rapid drying.

After any concrete wall is poured, there is a curing process that needs to occur. Without adequate curing conditions, this does not happen, and the wall weakens and is prone to cracking and even shifting.

One of the most common complaints in new homes is leaky basements due to cracked foundation walls. With ICF construction, concrete is protected by the very forms that create its shape, which means that the curing process will complete as required.

Can radius and angled walls be constructed with ICFs?

Pre-formed 90 and 45-degree corners are available to speed construction since they are the most commonly used corner angles. Radius walls are easily constructed by miter-cutting the form at the proper angle and using foam to join the edges. Some manufacturers will deliver already curved walls.

One thing to keep in mind is that you have to finish the basement with drywall due to the building code regulations. you can not have an “unfinished” basement due to the styrofoam fumes if it ever catches fire.

An ICF basement should be called a “lower level” since the old stereotypes about basement do not apply to them. An ICF foundation is warm, dry, quiet, comfortable, and provides no opportunity for

Do local building departments accept Insulated Concrete Forms?

Yes, most building departments throughout North America send their inspectors on courses to learn this type of construction.

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