As an example of the extent to which this can be carried on, I have known of instances where people presumed they were making a good roof by leaving slight air spaces by means of the furring laid between the roof plank and the top boarding.
This generous proposal met with the approval of all, and details were arranged accordingly that evening as to just what each was to do until the furring season closed in the spring.
In some instances a small amount of mortar is placed over each of the furring strips.
A sheathing on the outside plank between the timbers is laid vertically and fastened to horizontal furring strips.
But, if swinging doors are used, care should be taken that the hinges and latches are very strong, and securely fastened directly to the walls, and not to furring or anything in turn attached to the walls.
Set up horizontal furring strips at intervals of not more than two feet apart, using preferably cypress, as fir is soon spoiled by decay and by age.
Having arranged the furring strips, take cord made of Spanish broom, and tie Greek reeds, previously pounded flat, to them in the required contour.
