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WALL CONSTRUCTIONS <br />While a variety of wall constructions is available, the most common in new <br />homes is the 2 x 6 wood stud wall with exterior and interior finishes. <br />Until a laboratory or field measurement of this construction has been made, <br />it is assumed here that the basic wall with insulation provides an STC of <br />45 in the Minnesota climate. <br />2 x 4 stud 2 x 6 stud Concrete Block <br />v/— <br />El_ <br />1- 9— -�- <br />(STC 38 - 50) (STC 40 - 52) (STC 51 - 56) <br />STC Values for Exterior Construction (Based upon EWR data) <br />Exterior <br />Interior Skin and STC Rating <br />1/2" 3/8" 2-1/2" 2-3/8" 1/2" SB**1/2" SB <br />Gypsum* Gypsum Gypsum Gypsum 1/2" GYP 3/8" GYP <br />2 x 4 Studs <br />Alum. siding/1/2" wood 42 40 44 45 42 43 <br />7/8" stucco/1/2" wood 50 50 50 50 51 50 <br />1/2" wood siding 38 39 43 45 41 42 <br />3/4" wood siding 43 42 42 43 39 40 <br />2 x 6 Studs <br />Alum. siding/1/2" wood 44 42 46 47 44 45 <br />7/8" stucco/1/2" wood 52 52 52 52 53 52 <br />1/2" wood siding 40 41 45 47 43 44 <br />3/4" wood siding 45 44 44 45 41 42 <br />Other <br />--177" brick veneer 58 57 57 57 58 57 <br />6" concrete 59 60 62 61 61 62 <br />8" concrete 61 63 65 64 64 65 <br />6" hollow concrete block 51 52 54 54 53 53 <br />8" hollow concrete block 52 54 56 56 55 56 <br />6" block w/ 1/2" stucco 52 53 55 54 54 55 <br />8" block w/ 1/2" stucco 53 55 55 56 56 57 <br />*Gypsum - Gypsum board <br />**SB - Sound board <br />10 <br />