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

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DIRECTIONS FOR CORKBOARD ERECTION 297<br />

three per square foot. Join the sec<strong>on</strong>d layer of ceiling insula-<br />

ti<strong>on</strong> tightly with the opposite wall, cutting pieces of <strong>cork</strong>board<br />

neatly to fit and never using Portland cement mortar to fill<br />

in openings between <strong>cork</strong>boards or pieces of <strong>cork</strong>board.<br />

Give the cement backing ample time to set, at least 48<br />

hours, before applying a finish to the under surface of the<br />

<str<strong>on</strong>g>insulati<strong>on</strong></str<strong>on</strong>g>.<br />

130.—First Layer <str<strong>on</strong>g>Cork</str<strong>on</strong>g>board, over C<strong>on</strong>crete or Wood<br />

Floor or Roof, in Asphalt Cement.— See that the c<strong>on</strong>crete or<br />

wood surface to be insulated presents a smooth, c<strong>on</strong>tinuous<br />

solid surface, free from pits or open cracks and loose or warped<br />

boards, remove all dirt, plaster, paper, loose mortar, or other<br />

foreign material, or arrange to have these several items taken<br />

care of by those resp<strong>on</strong>sible for such preliminary work, before<br />

making preparati<strong>on</strong>s to apply <strong>cork</strong>board over a flat surface in<br />

Asphalt cement.<br />

Prepare suitable Asphalt cement in reas<strong>on</strong>able quantity,<br />

transfer it to the point of erecti<strong>on</strong> in buckets, flood the surface<br />

to be insulated with the molten material, uniformly over a<br />

small area or strip at a time, lay* down quickly in the hot<br />

Asphalt cement, first a row of <strong>cork</strong>boards against the edge of<br />

the wall, in a straight line, and closely follow with a sec<strong>on</strong>d<br />

and a third row of <strong>cork</strong>boards, each row lagging behind the<br />

preceding <strong>on</strong>e, in the laying, by the length of <strong>on</strong>e-half board.<br />

Keep the <strong>cork</strong>boards in each row in perfect alignment, so<br />

that the joints in the rows to follow may fit close and seal tight.<br />

Break all joints between the different rows, by starting<br />

alternate rows with half-length boards, and see that all joints<br />

are butted tight. When the opposite end and the opposite<br />

side of the floor or roof area is reached, cut pieces of <strong>cork</strong>-<br />

board neatly to fit and seal with the wall lines.<br />

When <str<strong>on</strong>g>complete</str<strong>on</strong>g>d, if the <strong>cork</strong>board was laid as an <strong>on</strong>ly<br />

layer of floor <str<strong>on</strong>g>insulati<strong>on</strong></str<strong>on</strong>g>, flood the top surface with the molten<br />

material to an even thickness of approximately ^/^-inch, and<br />

leave in readiness for the c<strong>on</strong>crete* wearing floor ; if the <strong>cork</strong>-<br />

board was laid as roof <str<strong>on</strong>g>insulati<strong>on</strong></str<strong>on</strong>g>, or as the first layer of a<br />

double layer floor <str<strong>on</strong>g>insulati<strong>on</strong></str<strong>on</strong>g>, leave the surface of the <strong>cork</strong>-<br />

*I{ wood floor is desired over single layer of <str<strong>on</strong>g>insulati<strong>on</strong></str<strong>on</strong>g>, instead of c<strong>on</strong>crete, then<br />

sleepers must be embedded in the single layer of <strong>cork</strong>board, as outlmed in Article 144.

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