David Bolton Fire-Rated Perimeter Weatherstrip on Steel Doors: Why the UL10C Listing Gets Overlooked Until the Door Fails Inspection Why Perimeter Weatherstrip Fails the Fire Door Inspection — and Nobody Noticed Until the End This article is for commercial contractors, facility managers, and project architects who are specifying or... NFPA 80 UL10C fire-rated doors perimeter seals weatherstrip May 25, 2026
David Bolton Security Window Lites on Wood Doors: Why the Glazing Spec Gets Settled After the Threat Level Is Set What This Article Covers and Who It Helps Security door window lites on wood doors come up on more project types than most contractors or facility managers expect: schools, healthcare corridors, retai... door glazing fire-rated doors school and healthcare hardware security window lites wood door hardware May 24, 2026
David Bolton Neoprene vs. PVC Astragal Seals on Door Pairs: Why the Seal Material Gets Chosen After the Gap, Not Before Why the Seal Material on a Door Pair Astragal Is Not a Default Decision This article is for contractors, facility managers, and project managers who are specifying or replacing the meeting-stile seal ... astragals and seals door pairs facility maintenance fire-rated doors weatherstrip May 20, 2026
David Bolton Fail-Secure Electric Strikes on Fire-Rated Doors: Why the Monitoring Spec Gets Dropped Before the Opening Is Complete What This Article Covers — and Who Needs It Fail-secure electric strikes on fire-rated openings are one of the most compliance-sensitive hardware decisions in commercial construction. Contractors, sec... NFPA 80 access control electric strikes fail-secure hardware fire-rated doors May 9, 2026