An inset storefront window frame is installed into a prepared wall opening with perimeter sealant joints and head flashing. Step 16 specifies the installation of backer rod and sealant-4 between the window frame and the jamb, head, and sill brake metal. Step 17 details the installation of the head flashing complete with end dams. Sealant-5 is applied at the perimeter interface per the detail callout. A general note directs the installer to consult window plans and sections for exterior rod and sealant installation.
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