4 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&ROMTHEINTERIORINSERTTHENOZZLE
OFTHEAPPLICATORAPPROXIMATELYDEEPINTOTHESPACEBETWEENTHE
WINDOWANDTHEROUGHOPENINGANDAPPLYADEEPBEADOFFOAM
4HISWILLALLOWROOMFOREXPANSIONOFTHEFOAMANDWILLMINIMIZE
SQUEEZEOUT)FUSINGFOAMOTHERTHAN'REAT3TUFF™ Window and
Door Insulation Foam Sealant by the Dow Chemical Company,
ALLOWTHEFOAMTODRYCOMPLETELYUSUALLYTOHOURSBEFORE
PROCEEDINGTOTHENEXTSTEP
Note: DO NOT completely fill the space from the back of the fin
to the interior face of the opening.
B. Check 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 that the sides are not bowed. If adjustments are required, remove the foam
with a serrated knife. Adjust the shims, and reapply the insulating foam sealant.
Interior
4A
B. Apply top flashing tape. Cut a piece of flashing tape long enough
TOGOACROSSTHETOPOFTHEWINDOWANDEXTENDATLEASTPAST
THESIDEmASHINGTAPEONBOTHSIDES!PPLYTHETAPEONTO
THEFRAMECLADDINGOVERTHETOPNAILINGlNASSHOWN&OLDTHE
OVERLAPPINGTAPEDOWNANDPRESSALLTAPEDOWNlRMLY
Note: DO NOT tape or seal the bottom nailing fin.
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
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C. Fold down top flapOFWATERRESISTIVEBARRIER#
D. Apply flashing tape to diagonal cuts. Cut pieces of
mASHINGTAPEATLEASTLONGERTHANTHEDIAGONALCUTSINTHE
water resistive barrier. Apply the tape covering the entire
diagonal cut in the water resistive barrier at both upper
corners of the window.
Note: Be sure to overlap the top corners (3D).
3 INTEGRATING THE WINDOW TO THE
WATER RESISTIVE BARRIER (continued)