Masonry Magazine January 1979 Page. 24
CONDUIT
It is possible to get double duty out of the cavity by using it to carry short runs of conduit. This feature must be used with caution so that a moisture bridge across the cavity is not formed.
SUMMARY
This Technical Notes has discussed and illustrated the general principles that are involved in the proper detailing of brick masonry cavity walls. The information, recommendations, and detailed drawings contained in this Technical Notes are based on the available data and experience of the Institute's technical staff. They should be recognized as suggestions and recommendations for the consideration of the designers, specifiers, and owners of buildings when using brick masonry cavity walls.
It is evident that all of the possible conditions and variations cannot be covered in a single Technical Notes. However, it is believed that the general principles and considerations are covered here. The final decision for details and materials to be used is not within the purview of the BIA and must rest with the project designer and/or owner.
Caulking and Sealants
Too frequently, caulking is considered a means of correcting or hiding poor workmanship, rather than as an integral part of construction. It should be detailed and installed with the same care as the other elements of the structure.
Joints at masonry openings for door and window frames, expansion joints, and other locations where caulking may be required, are the most susceptible areas for rain penetration. These areas should be given proper attention during detailing and construction. Also, maintenance programs should be provided to inspect and replace sealants or caulking which may have dried out, or otherwise become ineffective, see Figs. 16, 17 and 18. In all cases, the use of a good grade polysulfide, butyl or silicone rubber sealant is recommended. Oil based caulks should not be used. Regardless of the type used, proper priming and backing rope are a must.