For the insulation, the builder used blown cellulose and closed cell spray
foam on the exterior walls making the home extremely affordable to heat & cool.
Not exact matches
We know that spray
foam, when used in interiors, can be harmful due to its flammability and chemical composition; however, in this application, it's
on the
exterior side of the concrete, and does admittedly provide great insular advantages and does fulfill the qualities of «water control, air control, vapor control, and thermal control» needed for the so - called «perfect
wall.»
The construction of the home features specialized hurricane - resistant structural reinforcement and windows for coastal storm conditions, spray
foam insulation in the
wall cavities, rigid
foam to eliminate thermal bridging, and a mix of fiber cement and cedar siding
on the
exterior for long term durability and low maintenance.
An example would be framed
walls with insulation in the cavities along with more insulation (e.g.,
foam board or mineral wool)
on the
exterior.
Curve 2 shows that Increasing the R - value of the
wall to R - 11 by adding an inch of
foam on the
exterior, results in an increase of only R - 0.5 to R - 1.5 for the overall R - value for the same range of WWR.