Document NgQZdDzmxqqOZYD1jZVgjL6g

cf u n i BESTWALL GYPSUM CCHPAHY Paoli Mr. C. G. Shuttlaworth< December 11, 1957 .cc Messrs C. E. Abbey - Ardnor.. 0 ?. Grieve - Paoli H. D. Oha - St. Louis Sales L. W. Thompson - St. Louis Sales L. Dalton - St. Louis Soles Myron Read - Fort Dodge ACOUSTICAL PLASTER J. R. Watt - cw 3K On December 9th Mr. Dalton, Mr. Thompson and I uero in Evansville, Indiana to observe the application of our new acoustical plaster cn a snail Job in that city. The acoustical was applied on the ceiling of a restaurant, which was being remodeled. There were 139 sq.yds. of ceiling, all of which received acoustical plaster. The brown coat of gypsum basecoat, using perlite as aggregate, had been applied five days prior and was thoroughly dry. Welch-Sollnan, Inc., Evansville, plastering contractors, did the plastering. Hr. George Sollman was on the Job with us when the basecoat acoustical was applied. Approximately ten gallons water was used per 2S lb. bag of acoustical plaster. Two bags were nixed at a time in a mechanical mixer and each batch was allowed to mix at least ten minutes. The plaster was applied by hand. The two plasterers who applied it had never handled any of this typo acoustical plaster before and it took them a little while to get used to the material. After applying about 30 - iiQ yards they had become used to it and did a good Job. At first it was tried by one man darbying right behind the other who was applying. This did not work satisfactorily as the material had not "taken up" sufficiently. They both than started applying and did not use the darby until the material had been on the ceiling about ten minutes. This worked much batter, in fact worked entirely satisfactory. Two men applied the basecoat and darbied It in about three hours. After noon the heat was turned on low and a large L. ft. diameter exhaust fan in the rear of the building was also turned on. By about 101CXI P.M. the material had firmed up enough that Mr. Sollman thought it would be too dry to trowel easily the next morning if the fan was left on, so he turned it off. The following morning Mr. Welch, Mr. Thompson and I went out to inspect the Job. Much of the water had been taken out due to the heat and the fan yet there viere no large fissure cracks. Hr. Welch got two plasterers and they troweled the ceiling to got it smooth enough to receive the finish coat. There were no drop-outs and only two or three *imn blisters about the size of a dollar which trowelled b ack into place. The material trowelled easily and the ceiling looked very good. After they finished trowelling tbs heat and the large fan were turned on again. This is very severe drying conditions bat I do not anticipate any trouble. They are rushing the Job so the restaurant can be re-opened this weekend. If the basecoat is sufficiently dry they plan to apply the finish today. The finish is to be applied with a small spray gun. " Mr. Thompson is to follow the Job to completion and give a final report to all SGP 0018734 Mr. C G. Shuttleworth 2 December 11, 1957 ACOUSTICAL PLASTER J R. Watt concerned. Messrs Welch and Sollman were both pleased with the material. They want to use it on a large flob which is to be docs shortly after the first of the year. I told them its hoped to have the material on the market shortly after the first of the year, provided we have light reflection and sound absorption tests by then. They must have results of these tests in order to use it on the above mentioned job. Tuesday afternoon Mr. Thompson and I drove to Owensboro, Kentucky. There we contacted Hr. Carl Schrecker, Schrecker Plaster and Supply Co. who uses consider able Bestwall lath and plaster. He agreed to use some of the acoustical plaster, left over from the Evansville job, after the first of the year. This will (rive us a check on the ageing qualities of this formula. V.re went with Hr. Schrecker to the Daviess County Hospital job. Ho has the plasering contract and Bestwall lath and plaster will be used. They were doing some lathing but had not started plastering. One thing I neglected to mention was the coverage obtained on the basecoat acoustical applied at Evansville, v.'e got seven yards per 25 lb. bag which would be about twelve yardsper UO lb. bag. This is considerable more coverage than is obtained with Audicote or Sprayolite. Host plasterers say they get 7 to 8 yards per UO lb. bag with competitive materials. The material will give better coverage than competitive materials but this is exceptional and I don't think the trade should be told to expect this high a coverage figure. However, I do think they can consistently get 9-10 yards per UO lb. bag 1/2" thick. *# SGP 0018735