Storefronts are one of the most common types of non-flanged windows that we see. They are non-load bearing, meaning they do not act structurally for the building itself. When it comes to drainage, storefronts always weep at the sill condition, following the path of the arrows shown in the figure to the right.
They can withstand approximately 10 PSF of pressure when tested in accordance with ASTM E331 (the lab version of ASTM E1105), meaning that they are typically limited to first or second-floor use only.
Storefront windows are versatile for the alignment of the glass in the framing pocket. They can be front, center, or back set, as shown in the figure below.
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