Into BackBoxx™ Original™

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1. After the vapor barrier and drywall have been installed, fold the KrushGuard™ in a Z-fold pattern, and insert it through the speaker cutout hole.

2. Allow the KrushGuard™ to expand in this zig-zag pattern to provide even support for the entire BackBoxx™ surround. (Fig. 1).

3. After the expanding foam insulation is sprayed and dried, reach in and remove the KrushGuard supports. If undamaged, they may be used in a subsequent installation.

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Into BackBoxx™ POPP™

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1. After the vapor barrier and drywall have been installed, push the center dome outward and insert two (2) KrushGuards™. Push each to opposite ends of the BackBoxx™  POPP™, without attempting to expand them. Then, insert two (2) KrushGuard™ supports upwards in a V-shape, to support the dome. (Fig. 2)

2. After the expanding foam insulation is sprayed and dried, reach in and remove the KrushGuard™ supports. If undamaged, they may be used in a subsequent installation.