Installation Guide
Copyright ©2016 E. I. du Pont de Nemours and Company. All Rights Reserved. K27349 Version 4/16 8
Installation of Integral Flanged Windows in Recessed Openings
Before Water-Resistive Barrier (WRB) Is Installed
A-6. Crease Center Fold. Press firmly to create sharp crease in center and edges of
fold. Sharp creases are necessary so the folds remain in the top sheet of the
FlexWrap
™
NF after release paper is removed.
NOTE: Center crease should be sharp enough to assist in creating a ~90° fold between
the two release papers at a right angle with vertical crease (Crease B), as shown below:
A-7. Form Recessed Window Corner. Remove narrow-width release paper and, using
the creases made in Step A-6, carefully press together the exposed butyl within
the corner fold to create Recessed Window Corner. Repeat with the 3 remaining
12" pieces of FlexWrap™ NF.
ALTERNATIVE METHOD: Use the guide on page 17 of this document to create a
reusable template using a piece of hard/rigid plastic. Once created, the template can be
used to aid in removal of the release paper from the corner section only as indicated
below. The template will be placed over the 12” piece of DuPont
™
FlexWrap
™
NF
(release paper facing up) and aligned according to the applicable marks on the template.
The release paper can then be torn along the edge of the template to expose the butyl.
Alternatively, the template can be used to mark the release paper for removal. In this
case a straight edge can be used to assist in tearing the release paper. Do not cut the
release paper with a knife or other sharp object as this could result in damage to the
butyl and compromise protection provided by the DuPont™ FlexWrap™ NF Recessed
Window Corners.
Once the release paper is removed to create a triangular area of expose butyl, fold the
DuPont
™
FlexWrap
™
NF according to Step A-6 above to create the 90° corner and press
exposed butyl together. Once the remaining narrow release paper is removed, the
Recessed Window Corner is ready to install.
6”
6”
2”
2”
3”
3”
6" FlexWrap
™
NF 9" FlexWrap
™
NF
(for up to 2" recess) (for over 2" recess)