This photo is all the lumber that is needed to build a home on a basement.
The floor joists are the only part of the structural framing that has to be put together by hand. The exterior walls come as pre-made panels with the window and door openings already cut in. They are most of the right hand side stack in the photo.
The roof is constructed using prefabricated trusses (those big triangular pieces) and are in the bundle on the left of the photo.
Once the foundation is ready, a sill plate (a pressure treated 2”x6” piece of wood) is attached to bolts in the top of the foundation. If the house has a basement the first floor joist system attached to the sill plate. If it’s a slab foundation the wall panels attach directly to the sill plate.
Then a boom truck lifts the wall panels into place, which are quickly nailed together. The roof trusses are then swung into position, secured in place and then covered with 4’x8′ OSB boards which makes the decking that the shingles are nailed to.
The inside walls are then framed by hand using 2”x4” studs (wood) cut to size on site, this divides the space into rooms. All of that happens very quickly and is followed by the wiring, rough plumbing and the installation of the HVAC, most of which gets hidden in the walls and ceilings.
Then wall insulation is installed and gaps no matter how small between the framing and around doors and windows in the exterior walls are sealed with caulk and expanding foam. this is followed by the drywall which gives the interior definition for the first time. Then comes the attic insulation, trim work (doors, baseboards, cabinets, etc).
While this is underway the plumber, electrician and HVAC contractors come back and finish installing all the vents, switches, lights, bathroom and kitchen fixtures and fittings. The painters now get to work starting with filling nail holes, caulking joints and sanding rough areas and painting.
Painters are followed by the flooring contractor all in an orchestrated ballet that will build a house from start to finish in as little as seven weeks. The exterior is worked on as soon as the framing is finished with the roofer going first and finishing his job before the siding starts.
The last thing to happen is the grading with the installation of the driveway, walkways and steps.
It’s amazing to think that those huge bundles of lumber will turn into a gorgeous home.