Bruehound
Member
- Joined
- May 14, 2007
- Messages
- 841
:From the cross section it looks like very little of your exterior walls are concrete. Just the thin layer on the outside and most of the guts of your wall is the steel skeleton and spray foam insulation. Isn't the spray insulation very costly per sq/ft? I wanted to avoid using materials like drywall and wood studs. I don't want to build a concrete home so it looks like a regular stick framed house on the inside. I like the outside of your house but it seems like the interior is like a normal home. Is it not a good idea to use the ICF blocks and leave a natural concrete interior. The more I look into your moisture barrier comment the more I'm curious about sweating and moisture problems. I'm in Michigan so we get the extreme ends of the weather spectrum. I just like the look of exposed concrete. Kinda like this
You are correct, the ferrocement is thin but very high strength. I've had service tech's from satellite company etc get frustrated because even their masonry bits were breaking trying to drill into the material. Yes, the house is more conventional on the interior finishing(though the floorplan is unusual and the adobe walls give it great warmth and character). I like the look of what you are going for, too. Just a matter of preference and what works in your area. I was building with design considerations of hurricanes and humidity. For additional humidity control, we use a whole house desiccant wheel dehumidifier. It uses solar hot water as an energy source to regenerate the desiccant material. There is a natural balance in that design in that the load demand for dehumidification tends to track closely with the solar resources available- i.e. longer sunnier days in summer when humidity control is crucial.
Cost of closed cell is not cheap but its coming down and varies by region. That is why we only used 2.5" and finished the cavity with sprayed in fiberglass. Anytime you use a depth of over 2" with closed cell it also will act as a vapor barrier.
Last edited: