Why APA Rated Sturd-I-Floor over Basic Sheathing?

APA Rated Sturd-I-Floor is a special type of engineered wood panel with built-in underlayment, which provides a more durable and resistant layer for certain types of flooring than basic sheathing.  It is available in Exposure 1 and Exterior and a choice of two layups, which all comply with specific European and US standards.  More on Sturd-I-Floor features.

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