Masonry Magazine February 1968 Page. 9
Do something
to insulate cavity and block walls. Rock candy is better than nothing. We wish it was dead. But like Dr. Frankenstein's monster, air space in brick cavity and block walls keeps on living, even when you seal it up.
Whenever the temperature differs on the inside and outside of a wall (and it always does) convection starts a big wind in the cavities. The wind carries therms from the side where you want them to the side where you don't. That's why these walls have "U" values as high as 37. And that's why the occupants are as miserable as the heating and air conditioning bills.
Actually, rock candy, corncobs or last week's laundry in the voids would slow down these convection currents and cut the fuel bills somewhat.
Rock candy is dandy but Zonolite® Masonry Fill Insulation won't be eaten on the job
Zonolite Masonry Fill Insulation was developed specifically for these kinds of walls. It doubles their insulation value.
That's a boon to humanity; inside wall temperatures stay comfortable, heating and air conditioning bills stay way down.
Zonolite Masonry Fill pours right into the voids, fills them completely, never settles. It is water repellent; any water that gets into the wall drains down through it and out.
Cost: as low as 10¢ per square foot, installed. That's not a bad boon, either.
Next time use Zonolite Masonry Fill Insulation. It's working successfully in millions of feet of wall right now.
GRACE
Gentlemen:
Zonolite Division, W. R. Grace & Co.
Merchandise Mart Plaza, Chicago, III. 60654 MA62
I'm fascinated by the idea of insulating a wall with rock candy
Send me the short form spec.
I'm fascinated by the idea of insulating a wall with rock candy, too, but I'm afraid it will draw bugs. Send me Zonolite Masonry Fill Insulation booklet MF-83, with complete technical data and specification.
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