The cost of total ICF houses averages 3-5% more than stick built houses yet energy savings for the homeowner range between 30-70%.

ICF foundation walls need to be damp/water-proofed just as any other concrete or block walls along with protective boards.  Waiting several weeks is recommended for the concrete to cure and make sure the floors have been installed to brace the walls.

Gravel needs to be backfilled against the walls at least 1-2 feet thick and is recommended all the way up to the top soil for proper drainage and to relieve hydraulic pressure.

Mechanical trades working with ICF walls face challenges and benefits.  Electricians need to invest in a battery chainsaw to cut wire grooves quickly and box cavities.  Plumbers are seldom affected but ICF installers need to provide proper sleeves for water and sewer through foundation walls.  HVAC workers need to plan well for freon lines sleeves. They also need to downsize the heating/cooling units because the added insulation results in less load!

ICF walls typically can be constructed for any height, usually pouring each floor level before continuing upward.  Engineering is required for high wall construction and buildings exceeding 3 stories.

Key advantages for ICF for homeowner are great energy savings, low sound transfer from exterior noise, strength, security, disaster resistant, etc.

For contractors, this means less framing materials and labor.  Contractors may learn to install and do it themselves, saving time and money.  And delivering an ICF home for homeowners who have researched and want the benefits makes the contractor a true hero when many contractors are not willing to try something new.