Leaking corner of vinyl or aluminum window frame

Interior · Windows, Skylights and Solariums · printed page 366 (PDF page 367)

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Leaking Corner of Vinyl or Aluminum Window Frame

Text in the illustration

Leaking corner of vinyl or aluminum window frame joints between the horizontal and vertical sections of vinyl or aluminum should be sealed moisture penetrates the window frame at the corners of the tracks, causing damage below drywall
joints between the horizontal and vertical sections of vinyl or aluminum should be sealed
moisture penetrates the window frame at the corners of the tracks, causing damage below
drywall

Generated explanation

The illustration shows a cutaway of the lower corner of a vinyl or aluminum window frame above an interior drywall surface. The horizontal window tracks meet the vertical frame section at a corner joint. Blue arrows indicate moisture entering this joint, with a blue path extending down the drywall below to represent leakage and damage. The annotation specifies that joints between horizontal and vertical frame sections should be sealed.