Filter
Top Products
Building Paper Applications
(b) (d)
1. Apply nailing fin corner gaskets to each corner of the
nailing fin. Follow instructions on back of gasket.
(Units with clad flat casing do not use corner gas-
kets.)
2. If not done already, install a drip cap along the head
jamb or head jamb casing. Be sure to apply a bead
of sealant along the back sides of both vertical and
horizontal surfaces of the cap that come in contact
with the window, window casing, and/or sheathing.
See figure 18a.
IMPORTANT: Nailing fin is not designed to be a
weatherproof flashing.
3. Lap vertical strips of self sealing adhesive membrane
onto the unit or casing and out over the air barrier or
building paper. Make small cuts at the head jamb to
allow the membrane to fold back onto the exterior.
See figure 18b.
4. Install another layer of adhesive membrane lapping
onto head jamb of unit and over sheathing. Mem-
brane flashing at head jamb should extend and cover
flashing membrane previously installed at jambs.
See figure 18b.
5. Tuck a double ply layer of building paper under the sill
flashing. At the jambs, install a double ply roll beneath
the jamb flashing overlapping the previous course by
at least 2″
(51). Continue installing courses beyond
the height of the window unit as shown. See
figure 18c.
6. Size and cut a double roll of building paper to bridge
the opening between the paper courses at the sides.
This course should extend past the paper previously
installed by at least 6″
(152). See figure 18d. Proceed
to the “Final Sealing Procedures” section.
Sealant
Drip cap
Cut membrane at head
jamb and fold back.
Fold and adhere
membrane to jamb.
Install adhesive
membrane at head
jamb to cover drip
cap and membrane
at jambs.
Install adhesive
membrane to cover
paper and lap onto
window jamb.
Overlap subsequent
courses behind paper
previously installed at
jamb.
Tuck bottom double ply
layer of building paper
under paper at sill.
Install building
paper over
window head.
Extend 6″ past
paper at jambs
on either side.
Corner
gasket
Figure 18: Sealing the Installation in building paper applications
NOTE: Illustrations and text in this section refer to
units built without brick mould casing or flat casing.
Procedures are identical for windows with casing un-
less where noted.
(a)
(c)
16