Soft Inside Walls
. . . and this pattern finishes the inner surface of the Wall Membrane, and the under surface of Floor-Ceiling Vaults. If it is possible to use a soft material for the inner sheet of the wall membrane, then the wall will have the right character built in from the beginning.
Problem:
A wall which is too hard or too cold or too solid is unpleasant to touch; it makes decoration impossible, and creates hollow echoes.
Background & Research: Not Included on the site—Go read the book!
Solution:
Make every inside surface warm to the touch, soft enough to take small nails and tacks, and with a certain slight “give” to the touch. Soft plaster is very good; textile hangings, canework, weavings, also have this character And wood is fine, where you can afford it.
Usage:
In our own building system, we find it is worth putting on a light skim coat of plaster over the inner surfaces of the Wall Membrane and Floor-Ceiling Vaults. Wherever finish plaster meets columns, and beams, and doors and window frames, cover the joint with half-inch wooden trim—Half-Inch Trim . . .
pg. 1096