When it comes to multilayered dry-joint rainscreen systems, designers face a potential loophole in the specification/installation process. Should a leak occur in a rainscreen design, before or after the project’s completion, the owner is faced with a costly dilemma. The problem usually occurs when there are different subcontractors for the air and vapor barrier system and the exterior façade system—the opposing subcontractors tend to blame each other.
All roofs eventually leak—it is just a matter of when and where. Nevertheless, the hope is that new roofing systems do not leak right from the start. It is critical to verify the watertightness of roofing, especially if it is to be covered with ballast or a vegetated roof assembly.
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