For example, if you install R-19 fiberglass batts in 2x6 frame walls, with the studs 16 inches on-center, double top-plates, and other elements of standard framing, the actual R-value of the whole wall with the R-19 insulation will be about R-15.
birthplace - the place where someone was born. place of birth. place, spot, topographic point - a point located with respect to surface features of some region; this is a nice place for a picnic; a bright spot on a planet. place of origin, provenance, provenience, cradle.
In humans. The human placenta is formed when the external embryonic villous membrane unites with the uterine wall toward the end of the third month of pregnancy. In a full-term fetus, it resembles a flat disk measuring 15 cm wide, 20 cm long, and about 3 cm thick; its weight is about 500 g.