Instructions / Assembly
INSTALLATION INSTRUCTIONS
for Wood/Clad Wood Windows with Exterior Trim or Nail Fin (JII024)
6
FLASH WINDOW - CONTINUED
7
Sealant
COMPLETE INSTALLATION
8
1. Release the building wrap 
from above the header 
(previously taped up) and 
overlap the header ashing. 
Seal the ends with self-
adhesive ashing or building 
wrap tape.
2. Seal all four corners of the 
windowwitha3/8"bead
of sealant. Tool into a llet 
shape.
3.Sealanygapsoropeningsat
end of horizontal mull joints 
with sealant.
4. Create a continuous air seal 
on the interior between 
the rough opening and the 
window frame with low 
expansion polyurethane 
foam or backer rod and 
sealant. On the sill, the foam 
or sealant must create this 
air seal by integrating the 
back of the drain mat with 
the window frame and the 
rough opening.
AFTER INSTALLATION
•Installexteriorwallsurfacewithin30daysofwindowinstallation.
•Maintaingapof1/4"-3/8"betweenwindowframeandnalexterior
wall surface.
•Adjust windowforbestoperation.
•Removeprotectivelmfromcladding(ifpresent)immediatelyafter
installation;removefromglasswithinoneyear.
•Protectrecentlyinstalledunitsfromdamagefromplaster,paint,etc.
by covering the unit with plastic.
•Finishallexposedwoodsurfacesimmediatelyfollowinginstallation.
Please visit jeld-wen.com/resources for warranty 
and care and maintenance information.
Thank you for choosing
© 2008 JELD-WEN, inc. | JELD-WEN and Reliability for real life are registered trademarks of JELD-WEN, inc., Oregon USA. 
All other trademarks are the property of their respective owners.
(11/08) 
APPLY THE SELF-ADHESIVE FLASHING
Note! Keep the edge of the 
JELD-WEN self-adhesive 
ashing as close to the 
window frame as possible and 
apply over the nail n.
1. If installing a window 
ratedaboveDP50,center
andapply6"wideashing
below the sill.
2.  A pply the side pieces 
starting 2" above the 
header and overlap the 
drain mat on the sill as 
shown.
3.Centerandapplytheheader
piece above the header, 
overlapping the side pieces 
as shown.
4.  P ress the ashing down with 
a J-roller, being careful to 
remove any gaps or bubbles 
beneath self-adhesive 
ashing (remove and 
replace if necessary).
2"
2"
2"
Drain mat
Flashing
Low expansion 
foam
Shim
Drain mat
Rough 
opening
Back of 
drain mat
Sill






