Installation Guide

- 3 -
Application Guide
3M
™
All Weather Flashing Tape
8067
Apply sill
flashing tape
3. Apply sill flashing tape:
NOTE: There are other methods for flashing the sill that require additional materials
which are not included in this guide. However, it is good practice to create a slope on the
sill that directs water down to the outside of the building. In this case, a sloped sill may
be installed directly over the WRB before applying the sill flashing tape.
Follow this procedure when applying 3M™ All Weather Flashing Tape 8067:
Peel back a few inches of one side of the split paper release liner to position the tape.
Remove the liner while applying firm pressure to the flashing tape surface as it comes
into contact with the building surface. Repeat this procedure with the remaining side of
the paper release liner and tape. Using a roller (rubber, wood or steel “J” roller) apply
sufficient pressure along the entire tape surface to ensure a continuous seal and to
eliminate trapping air beneath the tape.
A. Cut a piece of 3M™ All Weather Flashing Tape 8067 a length equivalent to the width
of the rough opening plus 2 times the width of the flashing tape. Position and apply
the flashing tape on the face of the wall so that the top edge of the flashing tape
extends one inch above the top edge of the sill rough opening as shown in Fig. 3A1
and 3A2 as 1
st
sill flashing tape.
Figure 3A1: 1
st
sill flashing tape
The top edge of the flashing
tape is one inch above the
top edge of the sill rough
opening. See Figure 3A2
below.
3A1. 1
st
sill flashing tape is
the width of the rough
opening plus 2x the width of
the flashing tape. The tape
extends beyond the rough
opening approximately 1x the
width of the flashing tape on
each side.
Exposed sheathing
Figure 3A2: 1
st
sill flashing tape
1 in.
Extend flashing tape 1" above the sill, cut along
the right and left corner, fold back onto the sill.
Extend 1 width of flashing tape
on each side of the opening.