Out of square on purpose: Here's how carpenters create the custom formwork to realize an architect's vision.
Excavating the sloped site was complicated by rocky ledge just below the surface. The crew built stepped wooden footing forms to conform to the grade.
Here's a view of the stepped wooden footing forms with rebar in place, before the concrete is placed.
Here's another look at the freshly poured concrete footings, before wooden forms are stripped.
Carpenter Dale Cunningham applies polymer waterproofing to the top of the freshly placed footing.
Half the house will be supported by concrete piers, with an insulated floor spanning between supports. Here is a look at the freshly poured spread bases for the piers.
Here's a view of the completed perimeter footing, with forms stripped, ready for placement of ICFs.
Lead carpenter Mark Pollard places an ICF corner piece at one of the square corners of the perimeter foundation.
Working from the corner outward, Pollard places an ICF piece along the run of the foundation wall.
Pollard cuts a short section of ICF (left) and fits it into the remaining gap in a stretch
The ICF sections come with integral plastic bracing that also serves to position and hold the steel reinforcement for the wall (and also serves as an attachment point for bracing). Here, Pollard and Cunningham bend a piece of rebar after setting a course of ICF blocks.
Pollard and Cunningham carry a piece of rebar over to the wall after bending it to match the wall corners.
The challenge with this house is to form the non-square angles for the building's parallelogram foundation footprint — one open angle that is greater than 90 degrees (left), and one acute angle that is less than 90 degrees (right).
Pollard cuts the out-of-square miter on the polystyrene form block with a handsaw.
Standard right-angle ICF corners are made with manufactured one-piece corner blocks, and require no special reinforcement. But these custom out-of-square corners have to be stiffened and secured with braced OSB panels.