Duct wall penetration
Wall Penetrations Overview | Best Practices Manual | Hammer & Hand | Pacific NW Builder
3.1102.1 Wall Penetration Sealing
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openings which are made in floors and walls to accommodate through penetrating items such as ducts, metal and plastic pipes, electrical conduit, cables, cable.
Description:In many cases, a firestop system will consist of caulk and a backing material, or of caulk alone. The final step is to install the retaining angles to the flat sides of the duct. This is especially critical at the electrical panel where the main conduit enters the building. Many HVAC ducts penetrating fire-rated walls are externally insulated with light-density glass fiber duct wrap, whether for energy conservation, efficiency increases, condensation control, or even sound attenuation. They are also trained to understand how penetrants and materials react together. Apply fluid flashing at top of flashing back leg.