Cork insulation; a complete illustrated textbook on cork insulation ...

DIRECTIONS FOR CORKBOARD ERECTION 315
thoroughly dry, about 48 hours, before applying the finish
coat.
Prepare suitable Portland cement mortar in reasonable
quantity, mixed one part Portland cement to one part clean,
sharp sand, and then apply a top coat, of minimum depth of
1 inch, over the rough concrete base, slope to drain as specified,
and trowel to a smooth, hard surface.
144.—Wood Floors Secured to Sleepers Embedded in Insulation.—Embed
wood sleepers, 2 inches wide and of suitable
thickness, in the single or the second layer of corkboard, as
the case may be, by putting the sleepers in place, parallel to
' a'COB-K-
ftcONcaLTE- PLOOR.
BO^CX)
A^PHAL-T
S'COTiK. BOA.C.D
S\a:- NA.1UIMO i)TRJP.'
FIG. 143.—DIAGRAMMATIC ILLUSTRATION OF WOOD FLOOR OVEK
DOUBLE LAYER CORKBOARD APPLIED OVER CONCRETE SLAB.
each other, on 38-inch centers, and lay down a layer of cork-
board in suitable hot Asphalt cement between the sleepers
with all joints carefully butted and sealed tight. The top sur-
face of the corkboards and the sleepers shall then be flooded
with the same compound to a uniform thickness of approxi-
mately ^-inch.
Lay a finished wood floor of thoroughly dry and seasoned
J^-inch lumber, as specified, with approximately 1/32-inch
between the boards, to eliminate as much as possible the
tendency of the floor to expand and warp, secret nail securely
to the sleepers embedded in the corkboard underneath, and
leave the surface of the floor perfectly smooth and even.
145.—Galvanized Metal Over <strong>Cork</strong>board.—Embed wood
sleepers, 2 inches wide and of suitable thickness, in the single
or the second layer of corkboard, as the case may be, on the