TAMKO TW Moisture Wrap - Manual (Page 2)

Tamko
®
TW moisTure Wrap
above Grade moisture / air Barrier membrane
WIndOW FLAsHIng APPLICAtIOn
This section is for application of TW Moisture Wrap to protect against moisture and air leaks around window perimeters.
Before you begin - Determine if window will be installed prior to or after installation of the Water Resistive Barrier
(WRB) and follow the appropriate Method (Method A or A1) dependant on the WRB installation plan. Be sure to follow all
preparation, priming, fastening, and general application procedures as stated previously in these instructions together with
the specific window installation method.
metHOd A: APPLIed PRIOR tO WAteR ResIstIve BARRIeR (WRB)
(Self-Adhesive Flashing for windows with integral flanges; flashing applied prior to Water Resistive Barrier)
Figure 1: Window installation detail for windows
with integral flanges and flashing installed prior to
WRB
1. Sill Flashing - Flash the bottom of the sill by cutting the flashing the width of the rough opening plus 2 times the flashing
width. Partially remove the release liner so that the release liner remains in place on the lower two inches of the flashing.
Center the flashing horizontally relative to the rough opening. Align the edge of the flashing with the adhesive exposed with
the bottom of the rough window opening and firmly press the flashing into place. Tape the lower edge of the flashing to
prevent wind damage until WRB installation. Do not adhere the bottom 2" of the flashing at this time (See step 5 below).
2. Install Window - Install the window in the rough opening following the window manufacturer's instructions.
3. Jamb Flashing - Confirm window flange is clean and dirt-free by wiping the flange with a clean rag. Cut two jamb
flashings the length of the rough opening plus 2 times the width of the flashing minus 1". Align the end of one jamb flashing
even with the bottom of the sill flashing. Remove the release liner and press the flashing firmly into place, fully covering
the flange along one side of the window. Repeat procedure for other side of window. The ends of the sill flashing must
not protrude beyond the edges of the jamb flashings. If the sill flashing protrudes beyond the edges of the overlying jamb
flashings, remove and discard the protruding portion of the sill flashing.
4. Head Flashing - Confirm window flange is clean and dirt-free by wiping the flange with a clean rag. Cut the head flashing
the width of the rough opening plus 2 times the width of the flashing plus 2". Center the head flashing over the rough
opening. Remove the release liner and press the flashing firmly into place. Flashing must be flush against the top of the
window, fully covering the window flange and extending 1" beyond the jamb flashing on each side.
5. WRB Installation - Install the WRB in accordance with the WRB manufacturer's instructions. Tuck the WRB under the
unadhered portion of the sill flashing, remove the remainder of the release liner from the sill flashing, and adhere the sill
flashing to the WRB by firmly pressing the flashing into place.