Dimensions Guide
PRODUCT GUIDE
Vinyl Single and Double-Hung Windows (JPG006)
8
FRAME TWISTS
Attach two pieces
ofstringtoframe/
sash, corner to corner.
If there is a gap
between strings at
center point larger
than1/8"forwindows
up to 4' wide or high,
or3/16"forwindows
larger than 4' wide
or high, the frame is
not at. Repeat by
switching strings and
re-measuring.
PROPER SHIMMING
Measure width of
frame at top, center,
and bottom. If any
two measurements
differ more than
1/16",theframe
is over or under
shimmed. Repeat
process and measure
height of frame.
LEVEL AND PLUMB
For plumb, place level
againsteachsidejamb
or use a plumb bob.
For level, place level
againstheadjamb
and sill.
SQUARE
Measureframe/
sash from top left to
bottom right corner
and from top right to
bottom left corner. If
measurements differ
by1/8"forwindows
upto20sq.ft.or1/4"
for windows larger
than20sq.ft.,unitis
out-of-square.
PROPER WINDOW INSTALLATION
LEVEL INDICATOR
Accurate measurements are essential in determining level and plumb.
Most carpenters' levels have several bubble level indicators, making it
possible to measure all parts of the window.
Examine the horizontal indicator. If the bubble is centered between the
lines of the indicator, it is level.
Ifthebubbleisnotexactlycentered,measurehowfar“outoflevel”or
“outofplumb”bymaneuveringtheendoftheleveluntilthebubbleis
exactly centered. Measure the farthest gap between the level and the
surface.Ona2'level,thegapmustnotexceed1/16",orona4'level
(orlonger),thegapmustnotexceed1/8",orthesurfaceisoutoflevel/
plumb.
Sidejamb
Headjamb
Headjamb
Measure
here
•Proper installation is essential for keeping windows operating smoothly. If a window fails to operate properly, an inspection is necessary to determine if
it was installed correctly.
•These inspection instructions apply to at window types. Bow windows, bay windows, and unusual geometric-shaped windows are more complicated
and should be inspected by a window professional.
•Acontractororinstallercanassistindeterminingthecauseofawindowbeing“outofspecication”andpossiblycorrectit.Windowproblemsdueto
improper installation are usually not covered by the manufacturer’s warranty. For installation instructions, contact us or your supplier.
•ThespecicationsandmeasurementsreferencedinthisguidearetakenfromASTME2112StandardPracticeforInstallationofExteriorWindows,Doors
and Skylights.
Note: These instructions do not address inspection for proper “water tightness” or ashing. A “water tight” inspection requires removal of the exterior
siding around the window. Seek professional assistance regarding this issue.