Page 246 - Construction Waterproofing Handbook
P. 246
SEALANTS 5.5
FIGURE 5.3 Difference between control and expansion joint detailing of substrate.
● Wall intersections or changes in plane, Fig. 5.4
● Areas where large openings occur in the envelope, such as above and below window
openings
Isolation joints. Junctures at changes in materials require isolation joints to allow for any
differential movement between two different materials. Window frame perimeters abutting
facade materials and like areas of change in structural components (e.g., spandrel beam
meeting brick facing material) require sealant joints because of differential movement.
Detailing joints. Detailing joints are required as a component or part of complete water-
proofing systems. They are used to impart watertightness at building details such as pipe pen-
etrations and changes in plane before the application of primary waterproofing materials.
FIGURE 5.4 Horizontal to vertical transition detailing with sealant joints.
