Assertion: gypsum's use | /r/HasProperty | effective
Facets:
Source sentences:
text: The use of multiple layers of gypsum board, sometimes installed over sound-dampening metal resilient channels or isolation clips, can be effective, but it is often costly and problematic.
text: The use of multiple layers of gypsum board, sometimes installed over noise dampening resilient channels or isolation clips, was effective but often costly and time consuming.