Document jBN1d8E5VE26Zq70e2RQoavpp

Insulation Ehret Magnesia Manufacturing Co. Valley Forge, Pa. HEAT AND COLD INSULATIONS ' HEATING--Ehret's 85% Magnesia, Air Cell Coverings, No. 18 Insulating Cement. AIR CONDITIONING -- Nlcolfelt thermal and sound insulation, Ehret's Hair Felts, Cork Products. PLUMBING --Ehret's Wool Felt Pipe Covering, Anti-Sweat Pipe Cover ing, Frost-Proof Pipe Covering. ACOUSTICAL--Ehret's sound ab sorption and isolation felts. 85% MAGNESIA Ehret's 85% Magnesia, in pipe covering, block and plastic forms, has become, during the past 40 years, renowned in every industry where insulating problems arise. It is pre-eminently suited for all temperature conditions up to 600F. Made from basic, hydrated, magnesium carbonate, the material which engineers agree is unsurpassed for heat insulating purposes due to its myriads of dead en trapped air cells. Magnesia is manufactured from dolo mite rock, mixed with asbestos fibre binder and moulded with a controlled pressure to insure proper strength without destroying the minute air cells. 85% Magnesia cover ing can be salvaged, if necessary, and ground up into cement. It is light weight and although it can absorb many times its own weight in water, it will dry out in service without impairing its efficiency. For out door use 85% Magnesia is furnished with an asphalt saturated asbestos felt jacket. Substitutions for 85% Magnesia in sulations are very expensive. Its high thermal efficiency and long life free from shrinkage and deterioration make 85% Magnesia the most economical. No. 18 INSULATING CEMENT A plastic having great adhesive pro perty, it sticks firmly to any surface. No wire or mesh supports being necessary, the application is easy and economical. Recommended for monolithic insulation. Highly efficient. Low in cost due to its large covering capacity. Is effective up to 1800F. HAIR FELT Ehret's Standard Hair Felt, manu factured by the Platen Process, is com posed of 100% pure cattle hair. Most efficient on temperatures from 100F above to 60F below zero; Its efficiency, particularly at sub zero temperatures, is due to the close felting of the hair, exclud ing moisture-laden air which might greatly harm other types from resultant con densation. Ideally suited for insulating tanks, refrigerator cars, steel passenger and tank cars. Usually applied in layers, each of which is thoroughly air sealed. For brine and ammonia work, we recom mend a special "built-up" type of Hair Felt, fully described in our catalog "A-26." Punched Felts are also fur nished for special conditions. ENDURO HIGH TEMPERATURE INSULATION For those having problems with insulation at tetjiperatures from 600F to 2000F,, Enduro will prove of special interest. Information on request. Recommended Insulation Thickness for Flat Surfaces .Thermal Conductivities in Btu's Temperature of Hot Surface Under 300 to 450 to 600 to 300 450 600 700 Enduro.................... 85% Magnesia... Total........................ 1/2 m i'/i 3 i'/i 3 IV? 2 3'/2 700 to 800 2 2 4 Mean Temp. too 200 300 500 800 1000 85% . Magnesia 0.420 0.460 0.510 0.590 Enduro 0.465 0.500 0.550 0.620 0.730 0.840 (Plus a M in. Finish.) HEAT SEAL HOME INSULATION Loose Wool--Granulated Wool--Wool Bats 946 No. 18 Cement 0.520 0.560 0.610 0.700 0.840 0.930 Insulation International Fibre Board Limited Sales Offices OTTAWA--MONTREAL--TORONTO--WINNIPEG Administrative Offices and Mills: GATINEAU, QUE. London Office THE TENTEST FIBRE BOARD CO. Ltd. Astok Housb, Aldwych, London, W. C. 2.. Encland TEN/TEST is a manufactured lumber made from spruce fibres, solidly pressed under hydraulic pressure into a strong, homogeneous board. The fibres are chemi cally treated and water-proofed during process of manufacture, until the insula tion is non-hygroscopic, free from capillary attraction and moisture-resisting in service commensurate with the maximum degree of insulation obtainable. Official Tests Conductivity. TEN/TEST has a con ductivity of 0.33 B.T.U. per hour per square foot per degree fahr. per 1 in. thick. Authority: Professor E. A. Allcut, M. Sc. M. I. Mech. E. Mem. A.S.M.E. Professor of Applied Mechanics, University of Toronto. Tests performed by Hot-Plate method. Mean temperature 47.8 deg. Tensile Strength 228 lb. per sq. in. Tests made on in. board cut to strips 1 in. wide and tested in a Riehle Tensue Testing Machine, the grips being 2 in. apart. 228 lb. is the mean average of seven series of tests. Transverse Strength (equal deflec tion) is 28.4 lb. Test made on %6 in. board, 6 in. wide, 18 in. long, on 12 in. centers, and load being applied to breaking point. Plaster Bonding Strength 2163 lb. per sq. ft. Brown and scratch piaster coats were applied to standard jfs in. board, and the pull registered in an Olsen Testing Machine. Authority: Columbia University Testing Laboratories, New York. Moisture Resisting. TEN/TEST, after complete .immersion, in water for 24 hours, registered 37.5% increase in weight; Note.--Authority for tensile strength, transverse and moisture tests; J. T. Donald & Co., Ltd., Chemical Analysts and Engineers, Montreal, Que. TEN/TEST Products TEN/TEST Insulating Building Board. Standard insulation for use as exterior sheathing, interior finish; between walls and under floors for sound deadening. Standard Industrial Insulation for refrig eration and the prevention of condensa tion. Manufactured in convenient sizes: 4 ft. wide and up to 17 ft. long, % in. to 2 in. thick. TEN/TEST Notch Board Plaster Base. Insulating plaster base having tongue and groove interlocking joints. Provides an effective bond with plaster without use of metal lath at joints. Sizes: 16 in. wide; 32 in. and 47% in. long. Thicknesses from % in. to 2 in. TEN/TEST Roof Board. An effective roof insulation. Manufactured in two sizes: 1 x 4 ft. and 2 x 4 ft. Thicknesses from % in. to 2 in. TEN/TEST Ashlar Block (Acousti "A"). For interior decoration and acoustical correction. Absorbs 35 per cent of incident sound at a frequency of 512. Can be supplied in a variety of designs and sizes to harmonize with any decorative treatment, allowing the archi tect much freedom in design and finish of churches, auditoriums, theatres, etc. Ashlar Blocks have bevelled edges, standard or to suit, can be left in the natural color or tinted as desired. TEN/TEST Mouldings. An effective trim and finish for joints, corners, etc. Available in widths of % in. to 10 in. and lengths up to 12 ft. TEN/TEST Moulding Edge Wall Panels. Conceals joints and provides excellent decorative treatment. Featured in widths 11 in. to 47% in., lengths up to 12 ft. HYDRO/TEST. Water proof, insula ting building board, designed particularly . for low temperature requirements.