Home Uncategorized The slab foundation requires a vapor barrier and a minimum of 4″... Class 2 Base Rock compaction with a Vibro-plate. Uncategorized The slab foundation requires a vapor barrier and a minimum of 4″ of class 2 Base Rock compacted to prevent air pockets beneth the concrete that could lead to cracks in the cement. April 21, 2020 839 0 FacebookTwitterPinterestWhatsApp Class 2 Base Rock compaction with a Vibro-plate. RELATED ARTICLESMORE FROM AUTHOR Custom Red Birch Cabinetry to match existing 12-year-old cabinets 15′ Living Room Extension in Campbell, Ca. Custom Stratocaster and Amp in Black lacquer and Gold Leaf LEAVE A REPLY Cancel reply Please enter your comment! Please enter your name here You have entered an incorrect email address! Please enter your email address here Save my name, email, and website in this browser for the next time I comment.