Installation Instructions
SECURE WINDOW
Areas such as Florida and the Texas TDI region have different 
anchoring requirements based on product certification. For 
information on specific products, visit www.floridabuilding.org 
or www.tdi.texas.gov and follow the anchoring schedule given in 
the drawings for the product instead of the anchoring schedule in 
thisdocument.
Note! Fastener (anchor) 
heads must be flush. Do 
not dent nailing fin. Use 
the table below to find the 
correct product and fasten it 
asdirected.
Window
Window 
Mull joint
Nailing 
n
#8 x 1 1/4" pan/washer head screw
4"
4" 4"
See 
table
3"- 7"
Mull Example
INSTALLATION INSTRUCTIONS
for Vinyl Windows with Integral Nailing Fin (JII001)
5
INSTALL WINDOW
WARNING! To avoid injury, use at least two people to install. 
Adequately support the window until completely fastened.
1. Run a continuous 3/8" 
bead of sealant around 
the interior side of the nail 
fin on the side jambs and 
head. On the sill, leave at 
least a 2" gap every 8" 
where it will contact the 
rough opening.
2. Place window onto the 
shimming support and tilt 
into the rough opening. 
The window sill must rest 
on and be fully supported 
by the shimming support.
3. Fasten window through 
the nailing n between 
3"- 7" from one upper 
corner.
4. Shim at each interlock, or 
in the center, and within 
4"- 6" of each corner on 
the side and head jambs. 
Apply additional shims to 
the side and head jambs 
as necessary to ensure 
window position within 
the opening is plumb, 
level, and square. Larger 
windows usually need 
additional shims. Shims can 
be secured with sealant or 
adhesive.
5. Inspect window for square, 
level, and plumb. Test for 
proper operation (remove 
and reinstall if necessary).
Gap
Interlock
Center
Shim
Jamb
Rough 
opening
1/4" Sealant 
gap
Interior
PG20 up to PG35 Fasten window through the nailing n holes 
3" - 7" from the corners and 12" apart all the 
way around the window.
PG35 up to PG50 
Awning, Casement, 
Fixed, Hung, 
Slider, PD
Fasten window through the nailing n holes 
3" - 7" from the corners and 8" apart all the 
way around the window.
PG50 or above 
Awning, Casement, 
Slider, PD
Fasten window through the nailing n holes 
3" - 7" from the corners and 8" apart all the 
way around the window.
PG50 or above Fixed Fasten window through each nailing n hole 
(every 4") on the jambs and 8" apart along 
the head and sill.
PG50 or above Hung Fasten window through the nailing n 
holes 3" - 7" from the corners. Then, install 
fasteners 12" on center on the jambs, with 
fasteners every 4" on both sides of the 
Interlock. Install fasteners 8" apart along the 
head and sill.
Mull Joints The first 12" beyond mull joints, on both 
sides, must be fastened through each nail 
finhole.
Continuous Head and 
Sill PG35
The first 4" from center, on both sides, must 
be fastened every 2"
Continuous Head and 
Sill above PG35
The first 6" from center, on both sides, must 
be fastened every 2"
5
3"- 7"







