A lot bounded with streets on two sides. (intersecting).
corner
A lot located where a street is open at one end only and the street has a circular turnaround at the other end.
cul-de-sac
A projection built out from the slope of a roof, used to house windows on the upper floor and to provide additional light and ventilation.
dormer
A window consisting of two sashes that move up and down in a pair of channels and are held open by tension springs.
double-hung
A lot characterized by a long access road or driveway leading back to the main part of the lot.
flag
A roof design that peaks at the center ridge and extends downward on two opposite sides.
gable
Pitched roof with sloping sides and ends.
hip
A lot that is bounded on either side by another lot (lots in the middle of the block - not on the corner).
interior
A long skinny lot similar to the shaft of a key that is often bounded by as many as five or six lots (the term also refers to a lot that has added value because of its strategic location).
key
Resistance to heat flow. The measure of the energy-defectiveness of insulation.
R-value
A window characterized by a movable lower sash.
single-hung
An interior lot that suffers from its location at the end of a T-intersection ( a street ends in front of lot).
t-intersection
C
B
A
C
C
B
D
C
A
C
C
B