Concrete Subcontractors in Miami (Miami-Dade County), FL

Usually no. Anchor bolts, steel embeds, leveling plates, and weld-on inserts are typically furnished by the steel or miscellaneous metals sub and installed by the concrete sub during the pour. RFQs should state who furnishes and who installs each category of embed. A clean concrete bid lists embed installation as included by others-furnished or excludes it entirely and lets the GC reconcile.

Concrete testing — slump, air content, cylinder breaks — is almost always carried by a third-party testing lab paid by the owner or the GC, not the concrete sub. The concrete sub is responsible for delivering mix designs that meet the spec and cooperating with testing on site. RFQs should state who pays for testing; bids typically exclude testing as a line item.

Standard commercial slabs are specified with Floor Flatness (FF) and Floor Levelness (FL) numbers in Division 03. A conventional commercial slab runs around FF 25 / FL 20; a tighter spec for warehouse or retail floors can call for FF 35 / FL 25 or higher. Concrete bids should price to the called-out tolerance and note the assumption — high-tolerance floors take more screeding labor and finishing passes.

Construction joints, control joints (saw-cut or tooled), and expansion joints are typically called out on a joint plan in the structural set. The concrete sub prices the joint pattern shown and installs control joints to the spec'd depth and timing. Sealants in the joints — silicone or polyurethane fills — are sometimes carried by the concrete sub and sometimes by the sealant sub. RFQs should call out which.

The badge reflects what was reviewed: a verified license earns License Verified, a verified certificate of insurance earns Insurance Verified, and a sub with both reviewed shows both badges. Because concrete has no state license, the certificate of insurance is the credential most concrete subs upload, so Insurance Verified is the natural badge for the trade.