ProHOME Framing in Pictures — Walls and Floor
Thick walls designed for continuous, full-depth insulation at the floor joists work well for production building.
The double-wall construction of the ProHome looks much like any framed wall; it’s just that there is an outer and inner wall. Connecting the two walls at the top plate and the door and window openings are the only twist. The fact that these walls are ballooned framed, though, changes the way the second floor is framed: Hanging the floor system from a ledger means continuous, full-depth insulation in the walls, but the crew has to plan ahead to maintain the integrity of the interior air barrier.
Here’s a look at how the walls and floor were framed.
The window and door rough openings are framed 1 in. larger than needed: after the sheathing is cut out of the rough openings Zip System sheathing and tape will wrap the inside of the rough opening tying the inner and outer walls together. As you can see there’s no thermal bridge at the header. This cavity will be insulated with closed cell spray foam.
Once the walls are framed, the crew is ready to install the ledger that will support the second floor system. Before hanging the ledger a strip of Intello Plus membrane is stapled to the studs behind where the ledger is located and the vertical seams taped. Later, when the rest of the interior air barrier is installed, it will be overlapped and taped to this strip to create a continuous air barrier.
The AdvanTech subflooring is impervious to moisture during the framing process thanks to the sealed edges and the fact that each wood strand in the panel is coated with a moisture-resistant resin similar to polyurethane. When they’re ready to install the finish floor there will be no swollen edges to sand down.