Tag Archives: Chapter 7 – Structure

Framing and Drainage

Today the framing of the second floor began, and measures were taken to provide proper drainage from the building.

Click here to view the entire Nauhaus Prototype Construction Chronology.

Tim uses a custom-made tool to measure for the Hemcrete.
Tim uses a custom tool to measure for Hemcrete.

David Madera stopped by to discuss Hemcrete.
David Madera stopped by to discuss Hemcrete.
A strip drain is placed at the bottom of each wall.
A strip drain is placed at the bottom of each wall.
Gravel is shoveled into the Eastern trench.
Gravel is shoveled into the Eastern trench.
East Wall
Wast Wall Framing

Slab Edge Insulation and Drain

Today the foam insulation and drain were installed at the edges of the stem walls, and the CMU was sealed.

Click here to view the entire Nauhaus Prototype Construction Chronology.

This insulation will serve as a thermal break for the concrete slab.
This insulation will serve as a thermal break for the concrete slab.

The CMU is sealed to lock out moisture.
The CMU is sealed to lock out moisture.
These ties in the side of the CMU will serve a a mechanical connection to the spray foam insulation.
These ties in the side of the CMU will serve a a mechanical connection to the spray foam insulation.


Foundation Capillary Breaks

Building Science Corporation:

The theoretical limit of capillary rise in concrete is about 10 kilometers—and folks that is not a typo—it really is about 10 kilometers or about 6 miles. Concrete sucks big time. In wood it is about 400 feet—the height limit trees can grow to is set by the size of the capillary pores in wood. Ever wonder how leaves get water? When you go into a forest and listen very carefully you don’t hear any pumps pumping water upwards a couple of hundred feet do you? Capillary suction is powerful stuff. When you add salt to the water the power becomes explosive—literally as we shall see…

The article goes into detail about using lime mortar as a sacrificial layer to protect brick, and detailing foundations to direct capillary water to the outside.

:: BSC | Capillarity—Small Sacrifices