David Bolton Cremone Bolts on Storefront Doors: What They Are, Where They Fit, and What to Use Instead What This Article Covers This guide explains what a cremone bolt is, why it comes up on storefront door projects, and why it almost never belongs on a true commercial storefront opening. It also walks... door pairs flush bolts inactive leaf hardware storefront door hardware surface bolts Sep 8, 2026
David Bolton Exit Device Finish Matching Across Door Pairs: How to Keep Both Leaves Consistent When the Schedule Gets Built Why Finish Matching on a Door Pair Is Harder Than It Looks This article is for hardware specifiers, commercial subcontractors, and facility managers who deal with door pairs equipped with exit devices... commercial door hardware door pairs exit devices hardware finish hardware specification Sep 7, 2026
David Bolton Why the Door Coordinator Is the Most Overlooked Item on a Closer-Pair Hardware Schedule What This Article Covers -- and Who Needs It If you are specifying or installing surface closers on a pair of doors, the door coordinator is not optional hardware -- it is the device that makes the en... door closers door coordinators door pairs fire door hardware hardware scheduling Aug 30, 2026
David Bolton Astragal Selection for Fire-Rated Door Pairs: What the Opening Schedule Has to Get Right Why the Astragal Decision on a Fire-Rated Pair Is Not an Afterthought This article is for commercial contractors, facility managers, and specifiers who are working with labeled pairs of fire-rated doo... NFPA 80 astragals door pairs fire-rated doors meeting stile hardware Aug 30, 2026
David Bolton The Seal at the Center of the Door: How Meeting Stile Weatherstripping Works on Aluminum Pairs What Is a Meeting Stile Seal -- and Why Does It Matter? This article covers the weatherstripping that runs along the vertical center edge where two aluminum doors meet when both panels are closed. It ... aluminum doors door pairs meeting stile perimeter seals weatherstripping Aug 27, 2026
David Bolton Astragal Selection for Non-Rated Door Pairs: Getting the Meeting Edge Right Without Fire-Door Rules in the Way What This Article Covers and Who It Helps Non-rated door pairs -- double doors without a center mullion -- share a common problem: the gap at the meeting edge lets in light, air, sound, and foot traff... astragal commercial door hardware door pairs meeting edge seal weatherstripping Aug 14, 2026
David Bolton The Rim Strike on a Mullion-Free Door Pair: Why the Meeting Stile Clearance Gets Ignored Until the Panic Hardware Binds Why the Rim Strike on a Mullion-Free Pair Is Not an Afterthought This article is for commercial contractors, facility managers, and architects who are specifying or installing rim exit devices on pair... door pairs exit devices life safety panic hardware rim strike Jun 26, 2026
David Bolton Nylon Brush Astragals on Door Pairs: Why the Gap Closes Wrong When the Insert Material Gets Chosen Last The Seal Material Decision That Gets Pushed to the End of the Job This article is for commercial contractors, facility managers, and specifiers who are sourcing astragals for door pairs . It covers wh... astragals commercial door seals door pairs fire-rated hardware meeting stile Jun 10, 2026
David Bolton Surface Aluminum Astragals on Door Pairs: Why the Final Seal Adjustment Gets Skipped and the Gap Problem Starts at Move-In Why the Astragal Gap Problem Almost Always Shows Up After Move-In This article is for commercial contractors, facility managers, and project superintendents who have installed — or are about to instal... astragals commercial door hardware door pairs meeting stile weathersealing Jun 8, 2026
David Bolton Surface Vertical Rod Exit Devices on Door Pairs: Why the Strike Sequence Gets Decided After the Astragal Is Already Installed Why This Gets Ordered Wrong on Paired Openings Surface vertical rod (SVR) exit devices are a common specification on pairs of doors in schools, hospitals, retail exits, and industrial facilities. They... door pairs exit devices fire exit hardware life safety compliance surface vertical rod Jun 8, 2026
David Bolton Surface-Applied Aluminum Astragals on Door Pairs: Why the Final Seal Adjustment Gets Left for After Move-In What This Article Covers and Who It Helps Surface-applied aluminum astragals seal the meeting edge between the two leaves of a door pair. This article is for commercial subcontractors, facility mainte... astragals commercial door hardware door pairs seals and sweeps weatherstripping Jun 3, 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
