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Insulation The Barrett Company 40 Rector Street, New York, N. Y. 2800 So. Sacramento Ave., Chicago, 111. Fairfield P. O., Birmingham, Ala. DESCRIPTION AND INSULATING VALUE Barrett Rock Wool, a fibrous, fluffy, wool-like mineral material --over 90 per cent dead air cells-- is an excellent insulation against cold, heat and sound. It effectively reduces heat losses when applied in walls and under roofs. As much as 30 per cent-- sometimes even more--fuel savings are had. In summer homes are as much as 15 degrees cooler than out of doors. Reliable laboratory tests give Barrett Rock Wool a thermal conductivity rating of under 0.27 Btu at 72 F. Barrett Rock Wool will not burn. In wall and roof spaces which otherwise would serve as flues, it reduces building fire haz ards. The National Bureau of Standards fire rating for wood frame bearing and nonbearing walls is 1 hr. or 1 hrs respectively when covered with wood or metal lath and gypsum plaster and filled with batt type wool. New York City, Board of Standards and Appeals, has approved Barrett Rock Wool for fire-retarding construction. It is a non-conductor of electricity--ap proved by Underwriters Laboratories, Inc. for use around electric wiring. Barrett Rock Wool will not deteriorate with age. It is rot-proof, stable, light weight, will not settle, and is vermin resistant. It is extremely water-repellent material in a saturated atmosphere for many hours gained under 0.2 per cent in weight due to moisture absorption. It is uniformly high in quality---clean, odorless, TYPES FOR NEW AND OLD CONSTRUCTION free from impurities and extrane ous material. Barrett VB* Batts havea special water-repellent, vapor-resistant paper backing with a 1^ in. flap on all edges for lapping adjacent batts and framing to form a vapor seal. Batts apply either vertically or horizontally between standard 16 in. or 24 in. framing. Full, thick or semi thick, sizes 15 in. x23 in. and 15 in. x 48 in.; also Demi (Junior) Batts-- without paper backing, full thick, 9 in. x 15 in. Type GS, loose granular form, is blown pneumatically into stud, rafter and joist framing spaces of walls, roofs, ceilings and floors without any building alterations. Wall insulation thickness is stud depth-- approximately 3% in. density is under 10 lbs per cubic ft. This work is only done by our Authorized Home Insulation Ap plicators. Complete specifications and technical data on all types of Barrett Rock Wool Insulation will be furnished on request. INDUSTRIAL INSULATION A complete line of Rock Wool insulating products, including Barrett Blankets, Bar rett No. 1200 Plastic Insulation, Barrett Pipe Insulation, Barrett Stove Rolls and Barrett Cold Storage Insulation is avail able for all types of industrial installations. Complete information on request. Registered U. S. Pat. Off- Barreit VB* Balls are imprinted "Barren." Paper firmly anchored to wool, extends beyond all edges nf batt for effective vapor barrier--easy application. Barrett Rock Wool easily blown through hose info wall and roof spaces. Inside of building not dis turbed during application, no opening marks left. 1020 Insulation The Philip Carey Company Manufacturers of Heat Insulation and Asbestos Products `'lackland Cincinnati, Ohio Atlanta. Ga. Baltimore. Mo. . Boston, Mass. Buffalo. N. Y. Charlotte. N-C. Chattanooga. Tens. Chicago. III. Cincinnati. Ohio Cleveland. Ohio Columbus. Ohio Dallas. Tex. Davton. Ohio Detroit. Mich. Indianapolis, Ind. Kansas City. Mo. Los Angeles. Cal. Louisville, Ky. Minneapolis, Minn. Mew York, N.Y. Norfolk, Va. Philadelphia. Pa. Pittsburgh, Pa. St. Louis, Mo. Seattle, Wash. Wheeling, W. Va. Standard ifO deg Elbow assembly. Left: Core opened to show duct vanes. Right: The completed fitting. Careyduct is a new prefabricated insulated duct built entirely of as bestos. The double layer construc tion consists of an inner core of hard, rigid asbestos, and the outer jacket is made of multiple layers of a fine corrugated asbestos structure. The _ combination results in great strength, is an excellent insulator, and has a definite sound deadening effect. Careyduct fittings are made from standard sections of duct, and may be made in the field with compara tive ease by men without special training. A simple mitre cut plus a few standard accessories make a complete fitting thus keeping costs at a minimum. Prefabricated fit tings may be ordered from the fac tory if desired. Two standard 00 deg Elbows nested in a larger standard section to form a tec. The telescopic assembly method practically eliminates leaks that are commonly found in other construc tion. The standard sizes of Careyduct are designed so that a combination of smaller,sizes will exactly nest in a larger size. All tees and take-offs are a combination of ells and straight duct: Standard 1 in. and in. thick Careyduct sections with core extended. Grilles and dampers are installed according to the accepted standard practice. Careyduct.gives high in sulating value. It materially reduces the transmission of extraneous and equipment noises. Careyduct costs decidedly less than properly insu lated metal duct and compares very favorably with sheet metal duct of standard quality. lor more detailed information write for Catalog and Erection Manual. 1027