Masonry Magazine September 1970 Page. 13
Outside heat raises inside cooling costs. Zonolite can help reduce the problem at its foundation.
Look into Grace-Zonolite® Masonry Fill Insulation. It's incredible stuff. To put it another way, it's a lightweight, free-flowing, water-repellent, vermin proof, rot-proof, fire-proof, sound-deadening, inorganic, granular vermiculite!
Year after year, it can deliver savings in cooling and heating dollars that far exceed the initial cost of the fill.
Other virtues? Yep. Zonolite® Masonry Fill Insulation reduces sound transmission 20% to 31%. It increases a 2-hour fire rating to 4. It pours in at the rate of 28 square feet per minute. It's acceptable in FHA-financed housing.
Want all the details, test data, specifications, and such? Say the word!
"U" VALUES-concrete block walls
| Wall Thickness, Inches | Type of Block | Block Only Unin-sulated | In-sulated |
|---|---|---|---|
| 6 | Lightweight | .40 | .26 |
| 6 | Lightweight | .33 | .17 |
| 8 | Heavyweight | .53 | .36 |
| 8 | Lightweight | .33 | .12 |
| 12 | Heavyweight | .46 | .25 |
ZONOLITE
W. R. GRACE & CO.
62 Whittemore Avenue
Cambridge, Mass. 02140
CRACE
Just say Grace.