David Bolton Fire-Rated and Acoustic Automatic Door Bottoms: A Specifier's Guide to Getting the Assembly Right What This Guide Covers Automatic door bottoms that carry both a fire rating and an acoustic (sound attenuation) rating occupy a narrow but critical position in commercial hardware scheduling. Specifyi... acoustic door seals automatic door bottoms code compliance door gasketing fire door hardware Apr 22, 2026
David Bolton Full Mortised Auto Door Bottoms: Specifying and Installing the Right Drop Seal for Commercial Openings Why the Door Bottom Is the Most Overlooked Seal in the Assembly When architects and contractors detail a door opening, the perimeter gasketing and threshold typically receive careful attention. The au... automatic door bottoms commercial door installation door gasketing and weatherseal door sealing and energy efficiency fire door hardware Apr 22, 2026
David Bolton Astragals for Double Doors: Problems, Benefits, and the Right Solution What Is an Astragal -- and Why Does It Matter? An astragal is the hardware component that seals the gap between the two leaves of a pair of doors -- the meeting stile . Without one, that center gap be... astragals commercial door gasketing double door hardware fire door hardware meeting stile seal Apr 19, 2026