Masonry Magazine July 1967 Page. 9
Do something to insulate cavity and block walls.
Use peanut butter, even.
PEANUT
BUTTER
The so-called "dead" air space in cavity and block walls is very much alive. With problems and pitfalls.
Whenever the temperature differs on the inside and outside of a wall (that's only always) convection currents blow up a storm in the cavities. Therms busily shuttle from the side where you want them to the side where you don't.
The net result: misery of the occupants and misery of the heating and air conditioning bills.
In truth, peanut butter in the cavities of these otherwise perfectly fine walls actually would slow down these convection currents and cut the fuel bills somewhat.
Better than peanut butter:
Zonolite® Masonry Fill Insulation
Zonolite Masonry Fill Insulation was developed specifically for these kinds of walls. It doubles their insulation value. Naturally this keeps inside wall temperatures comfortable and cuts heating and air conditioning bills, which is a blessing.
It pours right into the voids, fills them completely and never settles. It is water repellent; any moisture that gets into the wall drains down through it and out. Cost: as low as 10ć per sq. ft. of wall, installed. That's a blessing, too. Next time, use Zonolite Masonry Fill Insulation. In your wall, you know it's right.
GRACE
Zonolite Division, W. R. Grace & Co.
135 S. LaSalle St., Chicago, Ill. 60603 M 167
Please send me the short form spec. for peanut butter as block and cavity wall insulation.
I like peanut butter but peanut butter doesn't like me. Send me Zonolite Masonry Fill Insulation Folder MF-83, which contains complete technical data and specifications.
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