Pella 80WW0101 Window User Manual


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5 INTERIOR SEAL
CAUTION: Ensure use of low pressure polyurethane window and door insulating foams
and strictly follow the foam manufacturer’s recommendations for application. Use of high
pressure foams or improper application of the foam may cause the window frame to bow
and hinder operation.
A. Apply insulating foam sealant. From the interior, insert
thenozzleoftheapplicatorapproximately1"deepinto
the space between the window and the rough opening
andapplya1"deepbeadoffoam.Thiswillallowroom
forexpansionofthefoamandwillminimizesqueeze
out.Applysealantacrossinteriorsurfaceofshims
to create a continuous seal. For windows with jamb
extensionsinstalled,ensurethefoamisplacedbetween
the window frame and the rough opening, not between
thejambextensionandtheroughopening.Followfoam
manufacturer’s instructions.
B. Check the window operation(ventunitsonly)byopeningandclosingthewindow.
Note: If the window does not operate correctly, check to make sure it is still plumb, level,
square, and the jambs are not bowed. If adjustments are required, remove the foam with
a serrated knife. Adjust the shims and reapply the insulating foam sealant.
6 EXTERIOR SEAL
A. Insert backer rod into the space around
the window. This should provide at least
3/8"clearancebetweenthebackerrod
andtheexteriorfaceofthewindow.
Note: Backer rod adds shape and depth
for the sealant line.
B. Place a bead of sealant at the jambs and
headbetweentheexistingwindowframe
and the replacement window frame.
C. Begin the sill sealant bead1/2"fromonejamb,runningitacrossthe
sillandstopping1/2"fromtheoppositejamb.This1/2"sealantgap
on each side of the sill allows for incidental water drainage.
D. Shape, tool, and clean excess sealant.Whennished,thesealantshouldbethe
shape of an hourglass.
Note: This method creates a more flexible sealant line capable of expanding
and contracting.
EXTERIOR
6A
6B
5A
Interior Finish or Trim: Thespacebetweenthenewwindowandtheexistingwindow’s
frame will need to be covered with trim. There are many ways to accomplish this and each
casecanbeunique.Howthisisdonewillbethedecisionofthehomeownerorwindow
installer.Afewpossibilitiesincludeusingcove,quarterround,orastopmoulding.
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