Shamrock Materials ready-mix concrete plant in Napa, CA
Napa RMC Plant 5136 · serving Napa, CA 94558-6205 (Napa County)
NRMCA-certified
Shamrock Materials (Napa RMC Plant 5136) is an NRMCA-certified ready-mix concrete plant serving Napa, CA and nearby ZIP areas. Request a ready-mix concrete quote for your pour (concrete strength, approximate size, pour date, and notes like slump or site access) below.
Certification
NRMCA cert #35877
Listed as certified when last checked 2026-07-03 · expires 2028-06-27
Contact
(800) 675-1511
Location is ZIP-area approximate; confirm exact address with the plant.
Available strengths (PSI), slump, and admixtures aren't verified here. Tell us your spec and we'll confirm with the plant. Estimates only.
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Source: NRMCA Currently Certified Plants directory. Ready Mix Concrete is an independent directory of NRMCA-certified ready-mix concrete plants and is not affiliated with Shamrock Materials.