Steel Door Installation Methods Explained: Block Frame, Tab-Mount, or Nailing Flange?
The three steel door installation methods compared — block frame, tab-mount, and nailing flange — when to use each, structural requirements, and installation sequence.
READ MORE +How to Properly Prepare Your Rough Opening for Steel Doors: A Contractor's Guide
Critical rough opening tolerances, structural header requirements, sill pan installation, WRB integration, and shimming strategy for custom steel door installation.
READ MORE +WUI-Compliant Steel Doors for California Wildfire Zones: What You Need to Know
California WUI zone steel door requirements — what Chapter 7A demands for glazing and frame specification, how to determine your WUI status, and how HERRERO handles WUI projects.
READ MORE +NFRC Certification Explained: What It Means for Your Steel Doors & Windows in California
NFRC certification explained for California steel door and window projects — U-factor, SHGC, VT, Title 24 documentation requirements, and what HERRERO provides.
READ MORE +Hot-Dip Galvanizing for Steel Doors: Why It Matters and How HERRERO Does It
What hot-dip galvanizing is, how it protects steel doors from corrosion, and why HERRERO applies it as standard — not an upgrade — on every unit.
READ MORE +Specifying Custom Steel Doors for a California Project: A Guide for Architects & Designers
Technical specification guide for architects designing California projects with custom steel doors and windows — rough openings, water management, structural headers, and California code requirements.
READ MORE +California Title 24 Compliance with Steel Doors & Windows: The Complete Guide
How to achieve California Title 24 compliance with custom steel doors and windows — thermal break requirements, NFRC certification, climate zones, and documentation for permit approval.
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