Backer rod / exterior seal & exterior gasket, Detail #39, Step #41 – EFCO 955 Series User Manual
Page 32: Cut length formula for wnb9 = d.l.o. + 2
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1/2"
(FS99)
ANCHOR
HORIZ. SILL
SILL
Detail #39
(FT01)
ANCHOR
VERT. SILL
STEP #41
SECTION VI - FRAME INSTALLATION
Install a continuous row of backer rod at the exterior side of the frame
and seal with silicone sealant. See the various details below.
3/4"
HEAD
(FS97)
HEAD ANCHOR
3/4"
1/2"
JAMB
SILL
CONT.
PAGE #30
JDA 9/2000
If the exterior glazing preset gasket (WNB9) has not been installed at this time,
STEP #42
BACKER ROD / EXTERIOR SEAL AND EXTERIOR GASKET
WNB9
WNB9
WNB9
WNB9
CUT LENGTH FORMULA
FOR WNB9 = D.L.O. + 2%
at the gasket ends due to gasket shrinkage.
do so now. Be sure to add 2% of the cut length to the gasket to prevent gaps
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