My mistake. The walls were up fully in 5 days. Either the roof took an unconscionably long time to make (which would surprise me - preformed trusses should make that job as easy as standard construction), or they just took their final shot 15 days later. The way the trusses were going up, I’d be surprised if the roof framing took more than 1-2 days.
Not similar - quite a bit better for wood. Most wood isn’t at similar thickness to brick when it yields similar R values.
There is more than one way to skin a cat, don’t you think? Duct work in a bungalow isn’t necessarily going to be in the walls: a sous-sol plenum is both simpler and more efficient. The only duct work is going to be the chimney (assuming a furnace rather than electrical heating).
Piping and wiring? Bring it up from a sous-sol entry, add breaks in the interior wall similar to the kinds of breaks they use for doors, windows, etc. (but much narrower). Cover it with a removable panel, and you have something more accessible than you get in standard construction. Not that difficult to do. Failing that, them up through shallow pilasters on the inner wall. Evidently the kit allows for services. It wouldn’t surprise me if that allowance takes one of these two forms.
The company quotes construction costs of ≤ €1,000/m2. For 120 m2, that comes to about $128,400 at worst case (at 1€ = 1.07$). Average American construction costs come in at approx. $150/ft2 (How Much Does it Cost to Build a House?). 120 m2 equals about 1,290 ft2, which comes to about $193,500. The company claims the usual cost of standard wood frame construction is €1,600/m2, which comes to $192,000 for this floor area, so we’re passing the sanity check so far. (Average French costs don’t appear to be much different from average American costs, which doesn’t surprise me.)
Now, are you going to tell me that grouted brickwork construction is cheaper than wood frame construction? By more than 10 times (if this wood brick construction is 10 times more expensive than grouted brickwork)?
