A.
Confirm the opening is plumb and level.
Note: It is critical the bottom is level.
B.
Confirm the window will fit the opening.
Measure all
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than the window in both width and height. On larger
openings measure the width and height in several places
to ensure the header or studs are not bowed.
Note: 1-1/2" or more of solid wood blocking is
required around the perimeter of the opening. Fix any
problems with the rough opening before proceeding.
C.
Cut the water resistive barrier.
D.
Fold the water resistive barrier.
Fold side flaps into
the opening and staple to the inside wall. Fold the top
flap up and temporarily fasten with flashing tape.
E.
Apply sill flashing tape #1.
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longer than the opening width. Apply at the bottom of the
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Note: The tape is cut 12" longer than the width of the
opening so it will extend up each side approximately 6".
F.
Tab the sill flashing tape and fold.
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resistive barrier.
G.
Apply sill flashing tape #2.
Cut a piece of flashing tape
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Note: The flashing tape does not need to extend all
the way to the interior of the framing.
1F
1"
1/2"
1/2"
6"
1E
1"
1G
Interior
1A
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Interior
1B
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1D
Exterior
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1
ROUGH OPENING
PREPARATION
