Statistical Interpretation of Data Obtained on Specimen A

In the case cited here as Specimen A, the sealant applicators participated in the testing process and fixed the failures immediately after they were found. The entire process took a total of six days (see Table 1).

Discussion Regarding Specimen A and Acceptable Rates of Failure

These numbers illustrate that the failure rate on the Specimen A wall grid was approximately four failures for every 90 m2 [1000 ft2]. The average size of a wall specimen tested in a mock-up laboratory prior to construction is around 90 m2 [1000 ft2]. For example, Fig. 4 depicts a wall section prior to testing at

FIG. 4—Mock-up wall section prior to testing at Construction Consulting Laboratory West, Ontario, California.

Construction Consulting Laboratory West, Ontario, California. This mock-up wall section was approxi­mately 1000 ft2 [90 m2] when completed. The number of leaks allowed in the laboratory to pass the wall test is zero. It is the author’s opinion that a zero seal failure rate is the best assurance that a wall will not allow water entry, this opinion is based on what is typically found during laboratory mock-up testing.