[GLOW]

I didn't do any research on Lanefab, but if you're doing Passive House for sustainability and energy savings, please keep in mind 2 things if the builder hasn't mentioned this to you already:
you're creating a very air tight building which retains heat/energy which is great...in the summer, not so great...air tight also means the air within your building is not leaking out and stays the same...
this means you need to incorporate/consider 2 things in your home: proper ventilation for good indoor air quality (bring in outdoor fresh air & exhaust stale indoor air) and proper cooling for thermal comfort. Incorporating passive cooling strategies such as cross ventilation (windows) and shading (awnings on west/south facing windows) will help to. I'm sure your custom builder/architect will talk to all this, but it's good to know and not be looking at cost cutting thinking it's not needed.

i look at multi-unit residential buildings where these are problems, maybe not as bad in a single detached home but if you're dropping $$$ on a new home that's PH you may as well make it livable all 12 months of the year