The next step for the exterior of the house is an energy efficient house wrap of the outer sheathing.  It is a breathable surface that prevents water from being trapped between the OSB walls and the siding, preventing mold, warping and other water induced problems for the outer structure. The wrap goes up over the course of a day by a small team with an army of ladders.  The house wrap is attached with small nails and staples.  As you can see from the pictures, Ryland Homes must have a bulk purchase deal with Green-Guard, as their logo is emblazoned over every piece.