Water and air leakage between the rooftop unit and the rooftop curb are prevented by:

A) UL-rated duct tape applied from the inside of the curb.
B) Gasket material between the curb and the unit.
C) UL-rated duct tape applied over the outside of the curb.
D) UL-rated duct tape applied to both the inside and outside of the curb.


B

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