Installation Guide
INSTALLATION INSTRUCTIONS
for Bifold Doors (JII103)
2
INSPECT FINISHED OPENING, REMOVE PACKAGING AND INSPECT DOOR
1
INSPECT FINISHED OPENING
• The width size specication (nished opening size) shown on the 
bifold packaging is 1/2" larger than the bifold set to allow for at least 
a 1/4" gap between the side jamb and pivot door (door secured to 
the oor and head jamb). Double units should have at least 1/4" gap 
between both side jambs and no gap between the doors that meet in 
the middle. 
• The height size specication (nished opening size) shown on the 
bifold packaging is 1-1/2" larger than the bifold set to allow for 
the track to be installed above the door set and the lower bracket 
installed below the door set.
• Measure height and 
width of nished 
wall opening and 
verify it is no more 
than 1/4" larger or 
smaller than the 
stated opening size 
on thepackaging.
• Once the door set(s) 
are installed, there 
is an additional 
hardware adjustment 
of up to 3/8" to 
center the sets in the 
nished opening.
• If the nished 
opening is too large, 
ller material, such 
as a 1" x 6" piece 
of pine trim can 
be tacked into the 
opening to bring it to the correct size. 
• If the nished opening is too small (1/2" or less), 1-3/8" thick hollow 
or solid core molded and ush doors may be trimmed 1/4" on each 
side as necessary. Trimming any other bifold type is not recommended. 
For the best appearance, trim an equal amount from opposite sides. 
To minimize chipping, stick masking tape along the cut line to each 
face of the slab. Make the cuts with a ne toothed circular saw. 
• If the opening is too far out of specication, or if you are 
not condent trimming, you can order custom sizes from our 
manufacturing locations to t the nished opening, or contact a 
building professional for assistance. Contact us or a dealer/distributor 
for options.
FOR RETROFIT INSTALLATIONS
For retrot installations remove the old door and contact your local 
waste management entities for proper disposal or recycling of products 
being removed.
REMOVE PACKAGING
Remove shipping materials such as corner covers, shipping blocks 
orpads.
INSPECT DOOR
• Cosmetic damage.
• Correct product (size, color, design, etc.).
Double Bifold Set
Single Bifold Set
Wall
Pivot 
door
Pivot 
door
Pivot 
door
Wall
Finished 
opening
No gap
1/4" 
min.
1/2" 
min.
1/2" 
min.
3/4" 
min.
3/4" 
min.
1/4" 
min.
1/4" 
min.
Finished 
opening









