Instructions / Assembly
06/15/18
Assembly and Installation Instructions
for F-2500 Fiberglass Folding Patio Doors (JII-90008) 
6
PREPARE STUD-FRAMED WALL
5
4. Cut two pieces of self-
adhered ashing 9" wide by 
the sill pan width + 3" long.
a. For continuous slab 
landings only, cut out the 
insidecorner.
b. Adhere the pieces of 
ashing to the inside 
corners. Stretch ashing 
as needed to cover 
corners and layat.
5. Smooth gaps or bubbles 
beneath self-adhered ashing 
with a J-roller (remove and 
replace if necessary).
6. Seal back corners of sill pan 
withsealant.
Refer to drawings on pages 
7 and 10 for suggestions if 
installing into a 2x4 stud wall 
or brick veneer opening. 
Otherwise, continue 
with section 6, "DOOR 
CONFIGURATIONS." 
Optional Drip Cap
Verify these steps are allowed by the building wrap manufacturer.
1. If installing a drip cap, (recommended because this integrates the 
building wrap and drip cap to protect the structure and the product 
from incidental water) at the head, slit building wrap 6" at 45°. Tape up 
asshown.
Install Jobsite Fabricated Sill Pan
NOTE: The rest of the steps in this section only apply to a job site 
fabricated sill pan. If installing a sill pan that you have purchased, 
follow manufacturer’s instructions for installation and skip to section 
6, “DOOR CONFIGURATIONS.”
2. Apply spray adhesive/primer to the sill pan and surrounding area. Follow 
manufacturer’s instructions for application methods.
3. Cut a piece of self-
adhered ashing the 
length of the sill and 
apply over the sill pan 
as shown. The bottom 
of the sill pan should 
be completely covered 
by the self-adhered 
ashing. For step-down 
landings, fold ashing 
down as shown. For 
continuous slabs, trim ush with roughopening.
3"
Sill pan 
width
9"
Discard 
(for 
continuous 
slab only)
Continuous Slab Landing
Sill pan 
width
6"
3"
Step-Down Landing
Sill pan 
width
6"
3"
Sealant
6"
45º










