Panelized walls (with pre-installed windows, pre-drilled studs for electrical lines, all blocking, pre-installed Tyvek), floors (with OSB & wall outlines & ID's inked on deck, HVAC & DWV holes pre-drilled, all blocking) & roofs (pre-installed ice-guard & underlayment, all blocking), then lifted into place to enable 2800sf house to be erected from the sill plate to the roof on & windows closed in 4-6 hours, depending on weather. NOTE: NO NAILS - SCREWS ONLY! 18' high, 2x6 exterior walls? No problem! It's your design, not ours. Curved walls, sloped curved walls: whatever you design, we pre-building as much as possible that will not get damaged during shipment nor erection. Can also pre-install electrical boxes & panels, plumbing sets, DWV & HVAC flanges/boots and associated lines/ducts: whatever you specify.