In this project we implement a finite-difference calculation of transient conduction in a slab subject to a time-varying convective boundary condition at one surface. In this case the slab corresponds to a wall of Jefferson’s Monticello. Those walls consist of 16″ of solid brick with a 1″ layer of plaster on the inside.  We assume the outside surface is unshaded.  Thus we use the diurnal variation of the Tsolair value corresponding to a dark-colored, west facing surface in July. While the “R” value (conductive resistance) of this brick wall is quite low, we find that the thermal mass is very dominant. (Writeup)