Masonry Magazine June 1968 Page. 9
CATSUP
There is a common delusion that the air space in masonry walls is dead. That is dead wrong. Whenever the temperature differs on the inside and outside of a wall (which is always) convection currents in the cavities carry BTU's from the side where you want them to the side where you don't. A masonry wall filled with catsup, kosher dill pickles or anything is better insulated than a wall filled with nothing but air.
Anything in the wall
is better than nothing at all.
Here's news about a special insulation that doubles insulating values, increases masonry fire ratings, too.
Zonolite Masonry Fill Insulation is the name. By doubling the insulating value of concrete block and brick cavity walls it keeps the occupants much more comfortable. Decreases the heating and air conditioning bills as well.
Can double fire ratings, too. An 8" lightweight block wall rated at two hours gets a four-hour rating when insulated with Zonolite Masonry Fill. Particularly important in perimeter, party and stairwell walls and elevator shafts.
And if that isn't enough, Zonolite Masonry Fill cuts sound transmission.
All for as little as 10c per square foot, installed. There simply is no other way to build a masonry wall that combines high insulating value, sound reduction, and fire safety at such low cost. For complete information, mail the coupon.
GRACE
Zonolite Div., W. R. Grace & Co., Dept. 000
Merchandise Mart Plaza, Chicago, III. 60654
Gentlemen: I like catsup on just about everything but masonry walls. Please send me latest Zonolite Masonry Fill Insulation publication with complete technical data and specifications.
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