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Why ICF · Living In ItHealth and Comfort in an ICF Home:
Health and Comfort in an ICF Home:
Quiet, Even and Draft-Free
Ask people who live in ICF homes what they like best and they rarely mention the heating bill. They talk about the quiet, the lack of drafts, and how the temperature stays the same from room to room. Here is why, and what you need to get right for good indoor air.
The Short Answer
ICF homes are quiet (STC 50 and up through the walls), draft-free because they are airtight, and even in temperature thanks to warm interior wall surfaces and thermal mass. They have no studs to rot and resist mould in the walls. The one thing you must get right is ventilation: a tight house needs a properly sized and balanced HRV or ERV, which the 2024 Ontario Building Code requires anyway.
Quiet
A standard ICF wall rates around STC 50 to 55, compared with the mid-30s for a basic wood stud wall. Traffic, lawnmowers, neighbours and storms fade into the background. See ICF soundproofing for the numbers and where noise still gets in.
Even Temperatures and No Drafts
Cold walls make you feel cold even when the thermostat says 21 C. In an ICF house the inside of the wall stays close to room temperature, so you are comfortable at a lower setting. With little air leakage there are no drafts along the floor, and the concrete smooths out the swings between day and night.
Indoor Air Quality
- Less outdoor dust, pollen and smoke leaking in through the walls.
- Fresh air comes in where you want it, through the ventilation system, filtered.
- Pick low-emission finishes, paints and adhesives; the house will not air out by accident.
- In parts of Ontario with radon, plan a sub-slab rough-in and test after you move in.
Get a Real Number for Your Project
Send us your plans or a rough sketch. We price the ICF work from real wall areas, not guesses, and tell you straight if ICF is not the right fit.
Moisture and Mould
Mould needs food, moisture and the right temperature. An ICF wall has no wood studs or paper-faced insulation inside it to feed mould, and the warm interior surface means you do not get condensation on cold walls the way you do on a bare concrete basement. Keep the humidity in the healthy range, roughly 30 to 50% in winter, and the house stays dry.
Ventilation Done Right
- Size the HRV or ERV from the house, not a rule of thumb, and show it on the ventilation design for the permit.
- Balance it at start-up so supply and exhaust match.
- Use a kitchen hood that vents outside, and bathroom fans that actually run.
- Change the filters. An HRV with clogged filters is a very expensive box.
If the windows sweat in January, the ventilation needs attention, not the walls. Our sister site explains HRV balancing.
Get a Real Number for Your Project
Send us your plans or a rough sketch. We price the ICF work from real wall areas, not guesses, and tell you straight if ICF is not the right fit.
Questions We Get
Are ICF homes healthy to live in?+
Yes, when ventilation is designed and balanced properly. They keep out drafts, outdoor dust and noise, and the walls have no wood studs to feed mould.
Do ICF homes have mould problems?+
Not in the walls, which have no organic material inside and stay warm. Mould in a tight house is a ventilation and humidity problem, solved with a properly balanced HRV or ERV.
Why do ICF homes feel more comfortable?+
The inside surface of the walls stays warm, there are no drafts, and the concrete evens out temperature swings.
Does an ICF house need special ventilation?+
It needs a properly designed and balanced HRV or ERV, which the 2024 Ontario Building Code requires in new homes anyway.