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WINDOW INSTALLATION
These installation instructions are to be used when installing the following Timeline Windows:
Casements, Awnings, Double Hungs, Gliders, Rectangular Direct Sets and Rectangular Sash Sets
This instruction provides the minimum recommended procedures to correctly prepare the rough opening, install a window unit and
apply flashing within a residential or light commercial structure that has the weather resistant barrier applied. Local climate may
dictate additional flashing at the discretion of the installer. These instructions are minimal recommendations only and do not supercede
local building codes
Proper installation and maintenance of Timeline windows is essential to proper window performance. Failure to follow these installation
and flashing guidelines may void Timeline’s Limited Warranty. Timeline recommends installation of its product by experienced
contractor personnel. If you have questions regarding window installation, contact your Timeline dealer, an experienced contractor or
contact Timeline at (800) 967-2461.
Preparing the Rough Opening (R.O.)
CLEARANCE: Timeline Vinyl Products Inc. published rough openings
allow for a 1/4” of clearance on all sides of the unit for insulation
purposes. Use of 1/4” shims on a level sill to provide proper spacing is
recommended prior to setting any unit.
MEASURING FOR SQUARE: Take
measurements from bottom left corner to top
right corner and bottom right corner to top
left corner and compare. If measurements
are equal the R.O. is square.
If
measurements are not equal, R.O. is out of
square and it is then the responsibility of the
installer to remedy this problem (fig.1).
CHECKING FOR PLUMB: Place a level
on both sides of the R.O. making sure the
vertical measurement of each side is true. If
R.O. is not plumb, it is then the responsibility
of the installer to remedy this problem (fig.1).
Figure 1
1
2
3
1. Square
2. Plumb
CHECKING LEVEL: Place a level on the
3. Level
sill of the R.O. making sure the horizontal
measurement on the sill is level. If opening is
not level, the use of shims may be used to level the sill (fig.1).
Note: Unit must be installed square, plumb and level or warranty may
be void.
Preparing the Weather Resistant Barrier
Draw a modified “I-Cut” with a
marker. Start from the top left of
the R.O. and continue to the top
right of the R.O. making sure
9”
mark is flush with rough
9”
opening. From the bottom left
corner of the R.O. draw a line
up approximately 45°. Repeat for
opposite side so the two lines
intersect. From the middle of the top of
the R.O. drop a line vertically so that it
intersects with the diagonal lines (fig.2).
Using a utility knife, cut the lines in the barrier starting with the head
and working your way down to create the modified “I-Cut. Fold the
bottom and side flaps over and into the interior side of the rough opening.
Using staples every 12” to 16” fasten the flaps to the interior and trim
excess (fig.3).
Per ASTM standards Timeline Vinyl
Products Inc. recommends a minimum
of 9” wide flexible flashing. For that
reason measure 9” up and 9” over from
the top left corner of your rough opening
and mark. Repeat on top right corner. A
scrap piece of flashing 9” x 9” may be
used to simplify this step. Once marked
cut the weather barrier diagonally from
the top corners of the rough opening to
the mark made previously (fig.2). Fold
weather barrier up and tape or tack
temporarily out of way (fig.3).
SILL FLASHING: Flashing can be
flexible or adhesive back flexible. All
flashing must be at least 9” wide & meet
(ASTM D-779; water resistance of at
least 24+ hours).
Apply a piece of flashing 1 that is 18”
longer than the rough opening. Apply sill
flashing level with top edge of R.O.
allowing 9” of flashing to extend to each
side of R.O. (fig. 4).
Figure 3
Figure 4
If using non adhesive flashing fasten the
top and sides of the sill flashing with
staples located 12” to 16” apart, locate
them where they will be covered by the
nail flange of the window.
Apply a piece of flashing 2 that is cut 12”
longer than the rough opening. Apply the
flashing so it is flush with the interior edge
of the rough sill and notched at the corners
to allow the flashing to extend 6” up the
jambs (fig. 4).
2
1
Figure 2
TIMELINE VINYL PRODUCTS, INC.
06/2003
Window Installation
Before installation check window to make
sure unit is complete and without defects.
JAMB FLASHING: Flashing can be flexible or adhesive back flexible.
All flashing must be at least 9” wide and cut so length will extend 8-1/2”
beyond the head and sill on both sides of R.O. (R.O. + 17”). If
stapling flashing do not
Figure 8
penetrate through window
mounting flange.
Figure 5
SHIMMING: Sill shims are to be applied
at each jamb, the center of each sill and
any mulls on multiple wide units (fig. 5).
Units wider than 24” may require more
shims on the sill.
Apply a continuous vertical
bead of sealant to the exterior
portion of the vertical mounting
flange, covering the mounting
holes as you go. Continue bead
8-1/2” above the R.O. (fig. 8).
Apply a continuous bead of sealant,
approximately 3/8” in diameter, to the back
of the mounting flange and in line with the
mounting holes. Alternatively, sealant can
also be applied to the R.O. to line up with
the holes on the mounting flange.
Place window into opening on top
of shims, press tight to building and
check for square, level, and plumb
(fig. 6).
Figure 6
At left or right side corner, tack
window through one mounting hole.
This will provide you with the ability
to adjust the unit while keeping the
window in place (fig. 7).
HEAD FLASHING:
Flashing can be flexible
or adhesive back flexible.
All flashing must be a
minimum of 9” wide and
cut so length is
approximately 10” beyond
the sides of the R.O. (R.O. +
20”). This will allow the head
flashing to overlap the jamb flashing
applied earlier.
Timeline Vinyl Products Inc.
recommends the use of fasteners that
penetrate window framing a minimum of
1”. Stainless or galvanized nails or
screws may be used. However, Timeline
Vinyl Products Inc. does not recommend
the use of pneumatic nail guns and will
not be responsible for any damage
caused by the use of these nail guns.
Apply a continuous horizontal bead of
sealant to the exterior portion of the
horizontal mounting flange at the head,
covering the mounting holes as you go, but
not extending past the vertical mounting
flange (fig.9).
Check unit for square and plumb, making
adjustments using shims until
window is square and plumb
Figure 7
in the opening. Shims are to
be apllied at the center point
of jambs to prevent bowing.
Taller units may require
additional shims along jamb.
Note: Unit must be installed
square, plumb and level or
warranty may be void.
2
Install head flashing over the horizontal
mounting flange and fasten. If using a nonadhesive flashing, be sure not to penetrate
through window mounting flange with
staples (fig. 9).
1
Lower the head weather barrier flap
previously taped out of way (fig.10). Place
over head flashing. Apply sheathing tape
to seal diagonal cut made in weather barrier.
3
Tack opposite diagonal corner
from first tack and check for
level, plumb, and square.
Fasten sides, top, and bottom,
using every other mounting
hole and continually checking
unit for square, plumb, and
level.
Install jamb flashing over side mounting
flange and sealant bead, tight against
window unit. If using a non-adhesive
flashing, be sure not to penetrate through
window mounting flange with staples.
Top edge of jamb flashing should extend
a maximum of 8-1/2” above the R.O. The
bottom of the jamb flashing extends
8-1/2” past the bottom of the R.O.
overlapping the sill flashing
Figure 9
applied earlier (fig. 8).
1. Square
2. Plumb
3. Level
Figure 10
This completes your window installation.
Failure to follow these recommended instructions may void
Timeline’s Limited Warranty.
TIMELINE VINYL PRODUCTS, INC.
06/2003
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