U.S. patent application number 11/640666 was filed with the patent office on 2008-06-19 for flashing for integrating windows with weather resistant barrier.
Invention is credited to Barbara Jean Crowder-Moore, James Dean Katsaros, Barbara Klimowicz O'Rourke, Ashok Harakhlal Shah.
Application Number | 20080141597 11/640666 |
Document ID | / |
Family ID | 39525457 |
Filed Date | 2008-06-19 |
United States Patent
Application |
20080141597 |
Kind Code |
A1 |
O'Rourke; Barbara Klimowicz ;
et al. |
June 19, 2008 |
Flashing for integrating windows with weather resistant barrier
Abstract
A self-adhesive flashing for integrating a flanged fenestration
unit installed in a rough opening in a wall with a water resistive
barrier where the flashing includes an elongated substrate having a
pressure-sensitive adhesive layer adhered to at least one side of
the substrate along a lateral edge of the substrate and methods for
applying the flashing.
Inventors: |
O'Rourke; Barbara Klimowicz;
(Newark, DE) ; Crowder-Moore; Barbara Jean;
(Church Road, VA) ; Katsaros; James Dean;
(Midlothian, VA) ; Shah; Ashok Harakhlal;
(Midlothian, VA) |
Correspondence
Address: |
E I DU PONT DE NEMOURS AND COMPANY;LEGAL PATENT RECORDS CENTER
BARLEY MILL PLAZA 25/1122B, 4417 LANCASTER PIKE
WILMINGTON
DE
19805
US
|
Family ID: |
39525457 |
Appl. No.: |
11/640666 |
Filed: |
December 18, 2006 |
Current U.S.
Class: |
52/62 ;
52/58 |
Current CPC
Class: |
Y10T 428/2476 20150115;
E06B 2001/628 20130101; E06B 1/62 20130101; Y10T 156/1051 20150115;
Y10T 428/24752 20150115 |
Class at
Publication: |
52/62 ;
52/58 |
International
Class: |
E04B 1/62 20060101
E04B001/62; E04D 1/36 20060101 E04D001/36 |
Claims
1. A flashing for integrating a flanged fenestration unit and a
water resistive barrier, the flashing comprising: (a) an elongated
flexible substrate having two major surfaces and a first lateral
edge and second lateral edge defining a width of the substrate
therebetween, the substrate selected from the group consisting of
nonwoven fabric, woven fabric, film, paper, sheet metal, and
combinations thereof; (b) an elongated adhesive layer having a
width less than the width of the substrate adhered to one of the
major surfaces of the substrate adjacent the first lateral edge of
the substrate; (c) a release liner covering the adhesive layer
wherein the release liner is scored or perforated along a line
parallel to the first lateral edge of the substrate and located a
distance from the first lateral edge that is less than the width of
the adhesive layer dividing the release liner into a first release
liner section adjacent the first lateral edge and a second release
liner section.
2. A flashing for integrating a flanged fenestration unit and a
water resistive barrier, the flashing comprising: (a) an elongated
flexible substrate having two major surfaces and a first lateral
edge and second lateral edge defining a width of the substrate
therebetween, the substrate selected from the group consisting of
nonwoven fabric, woven fabric, film, paper, sheet metal, and a
combination thereof; (b) an elongated adhesive layer having a width
less than the width of the substrate adhered to each of the major
surfaces of the substrate adjacent the first lateral edge of the
substrate; (c) a release liner covering each of the adhesive
layers.
3. A flashing for integrating a flanged fenestration unit and a
water resistive barrier, the flashing comprising: (a) an elongated
flexible substrate having two major surfaces and first and second
lateral edges defining a width of the substrate therebetween, the
substrate selected from the group consisting of nonwoven fabric,
woven fabric, film, paper, sheet metal, and a combination thereof;
(b) a first elongated adhesive layer adhered to one of the major
surfaces of the substrate wherein the first elongated adhesive
layer has a first edge substantially adjacent the first lateral
edge of the substrate and a second edge, (c) a second elongated
adhesive layer adhered to the other major surface of the substrate
wherein the second elongated adhesive layer does not overlap the
first elongated adhesive layer in the plane of the substrate; (d) a
release liner covering each of the adhesive layers.
4. A flashing for integrating a flanged fenestration unit and a
water resistive barrier, the flashing comprising: (a) an elongated
flexible substrate having two major surfaces and a first lateral
edge and second lateral edge defining a width of the substrate
therebetween, the substrate selected from the group consisting of
nonwoven fabric, woven fabric, film, paper, sheet metal, and
combinations thereof; (b) an elongated adhesive layer having a
width less than the width of the substrate adhered to one of the
major surfaces of the substrate such that elongated adhesive layer
extends beyond the first lateral edge of the substrate; (c) a first
release liner covering only the width of the surface of the
elongated adhesive layer that extends beyond the first lateral edge
of the substrate (d) a second release liner covering the entire
width of the surface of the elongated adhesive layer opposite the
surface in (c) wherein the second release liner is scored or
perforated along a line parallel to the first lateral edge of the
substrate and divides the second release liner into a first section
and a second section.
5. The flashing of claim 1, 2, 3 or 4, wherein the adhesive layer
comprises butyl rubber adhesive.
6. The flashing of claim 1, 2, 3 or 4, wherein the substrate is
folded outward near the second lateral edge.
7. The flashing of claim 3, wherein the first elongated adhesive
layer and the second elongated adhesive layer each has a width of
about 1 inch (2.54 cm) to 3 inches (7.6.2 cm).
8. A method for preventing the ingress of moisture into a wall of a
building surrounding a flanged fenestration unit installed in a
rough opening of the wall, the wall and the rough opening being
defined by framing members, the method comprising: (a) installing
the fenestration unit in the rough opening such that the flange of
the fenestration unit overlaps the framing members of the rough
opening; (b) providing a flashing comprising an elongated flexible
substrate having two major surfaces and a first lateral edge and
second lateral edge defining a width of the substrate therebetween,
an elongated adhesive layer having a width less than the width of
the substrate adhered to one of the major surfaces of the substrate
adjacent the first lateral edge of the substrate, and a release
liner covering the adhesive layer wherein the release liner is
scored along a line parallel to the first lateral edge of the
substrate and located a distance from the first lateral edge that
is less than the width of the adhesive layer dividing the release
liner into a first release liner section adjacent the first lateral
edge and a second release liner section; (c) folding the flashing
along the scored line such that the substrate is folded on itself;
(d) removing the second release liner section from the flashing to
expose a portion of the adhesive layer; (e) adhering the exposed
adhesive to the flange of the fenestration unit along the sides and
uppermost portion of the fenestration unit; (f) removing the first
release liner section from the flashing to expose the remaining
portion of the adhesive layer; (g) installing water resistive
barrier over the wall surrounding the fenestration unit such that
the water resistive barrier is adhered to the remaining portion of
the adhesive layer along the sides and uppermost portion of the
fenestration unit and such that the water resistive barrier
immediately below the lowermost portion of the fenestration unit is
covered by the substrate of the flashing.
9. A method for preventing the ingress of moisture into a wall of a
building surrounding a flanged fenestration unit installed in a
rough opening of the wall, the wall and the rough opening being
defined by framing members, the method comprising: (a) installing
the fenestration unit in the rough opening such that the flange of
the fenestration unit overlaps the framing members of the rough
opening; (b) providing a flashing comprising an elongated flexible
substrate having two major surfaces and a first lateral edge and
second lateral edge defining a width of the substrate therebetween,
an elongated adhesive layer having a width less than the width of
the substrate adhered to each of the major surfaces of the
substrate adjacent the first lateral edge of the substrate, and a
release liner covering each of the adhesive layers; (c) removing
the release liner from one of the adhesive layers to expose the
adhesive layer; (d) adhering the exposed adhesive layer to the
flange of the fenestration unit along the sides and uppermost
portion of the fenestration unit; (e) removing the release liner
from the flashing to expose the remaining adhesive layer; (f)
installing water resistive barrier over the wall surrounding the
fenestration unit such that the water resistive barrier is adhered
to the remaining adhesive layer along the sides and uppermost
portion of the fenestration unit and such that the water resistive
barrier immediately below the lowermost portion of the fenestration
unit is covered by the substrate of the flashing.
10. A method for preventing the ingress of moisture into a wall of
a building surrounding a flanged fenestration unit installed in a
rough opening of the wall, the wall and the rough opening being
defined by framing members, the method comprising: (a) providing a
flashing comprising an elongated flexible substrate having two
major surfaces and a first lateral edge and second lateral edge
defining a width of the substrate therebetween, an elongated
adhesive layer having a width less than the width of the substrate
adhered to one of the major surfaces of the substrate adjacent the
first lateral edge of the substrate, and a release liner covering
the adhesive layer wherein the release liner is scored along a line
parallel to the first lateral edge of the substrate and located a
distance from the first lateral edge that is less than the width of
the adhesive layer dividing the release liner into a first release
liner section adjacent the first lateral edge and a second release
liner section; (b) folding the flashing along the scored line such
that the substrate is folded on itself; (c) removing the second
release liner section from the flashing to expose a portion of the
adhesive layer; (d) adhering the exposed adhesive to the flange of
a fenestration unit along the sides and uppermost portion of the
fenestration unit; (e) installing the fenestration unit in the
rough opening such that the flange of the fenestration unit
overlaps the framing members of the rough opening; (f) removing the
first release liner section from the flashing to expose the
remaining portion of the adhesive layer; (g) installing water
resistive barrier over the wall surrounding the fenestration unit
such that the water resistive barrier is adhered to the remaining
portion of the adhesive layer along the sides and uppermost portion
of the fenestration unit and such that the water resistive barrier
immediately below the lowermost portion of the fenestration unit is
covered by the substrate of the flashing.
11. A method for preventing the ingress of moisture into a wall of
a building surrounding a flanged fenestration unit installed in a
rough opening of the wall, the wall and the rough opening being
defined by framing members, the method comprising: (a) providing a
flashing comprising an elongated flexible substrate having two
major surfaces and a first lateral edge and second lateral edge
defining a width of the substrate therebetween, an elongated
adhesive layer having a width less than the width of the substrate
adhered to each of the major surfaces of the substrate adjacent the
first lateral edge of the substrate, and a release liner covering
each of the adhesive layers; (b) removing the release liner from
one of the adhesive layers to expose the adhesive layer; (c)
adhering the exposed adhesive layer to the flange of a fenestration
unit along the sides and uppermost portion of the fenestration
unit; (d) installing the fenestration unit in the rough opening
such that the flange of the fenestration unit overlaps the framing
members of the rough opening; (e) removing the release liner from
the flashing to expose the remaining adhesive layer; (f) installing
water resistive barrier over the wall surrounding the fenestration
unit such that the water resistive barrier is adhered to the
remaining adhesive layer along the sides and uppermost portion of
the fenestration unit and such that the water resistive barrier
immediately below the lowermost portion of the fenestration unit is
covered by the substrate of the flashing.
12. A method for forming the flashing of claim 2 comprising: (a)
providing a flashing starting material comprising: (i) an elongated
flexible substrate having two major surfaces and a first lateral
edge and second lateral edge defining a width of the substrate
therebetween, the substrate selected from the group consisting of
nonwoven fabric, woven fabric, film, paper, sheet metal, and a
combination thereof; (ii) an adhesive layer adhered to one of the
major surfaces of the substrate such that a first portion of the
adhesive layer covers a portion of the substrate adjacent the first
lateral edge of the substrate in the second portion of the adhesive
layer extends beyond the first lateral edge; (iii) a release liner
covering the adhesive layer on the side opposite the substrate
wherein the release liner is scored along the lateral edge of the
substrate; (b) folding the adhesive layer over the lateral edge of
the substrate so that the adhesive layer is adhered to each of the
major surfaces of the substrate.
13. The method of claim 12, wherein the starting flashing material
further comprises an intermediate release liner covering the second
portion of the adhesive layer extending beyond the first lateral
edge, the method further comprising removing the intermediate
release liner prior to folding the adhesive layer over the lateral
edge of the substrate.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to flashing for preventing the
ingress of moisture into a wall of a building around an installed
window.
[0003] 2. Description of the Related Art
[0004] In "open-stud" building construction, windows and other
fenestration products are installed directly into building openings
formed by framing members (e.g., wood studs) prior to the
installation of water resistive barrier ("WRB") over the framing
members which form the wall cavities. Two types of flashing are
known for use in open-stud construction. One type of flashing is
"nail-on flashing" formed from a strip of water-impermeable film
which is nailed to the wood studs before a window is installed such
that, upon window installation, the edge of the flashing is covered
by the window flange. A second type of flashing is "self-adhered
flashing" formed from a water-impermeable film with a strip of
adhesive along the edge for attachment to the window flange along
the vertical jambs and the horizontal head of the window, wherein
the adhesive is covered by a release liner. Self-adhered flashing
can also comprise adhesive over an entire surface. Water resistive
barrier is subsequently installed over the framed walls of the
building such that around the window, the water resistive barrier
covers the flashing at the vertical jambs and head of the window
and is layered behind the flashing at the window sill.
[0005] According to conventional practice in open-stud
construction, the space between the water resistive barrier and the
flashing at the vertical jambs and head is not sealed, thus
creating the possibility of rainwater entering between the WRB and
the flashing. The purpose of the flashing is to divert such water
down and eventually to the outside of the WRB at the sill. Under
excessive wind forces, water that has entered the space behind the
WRB can travel beyond the width of the flashing into the wall
cavity which may result in moisture damage to the framing members,
such as rotting of wood studs and loss of insulation.
[0006] It would be desirable to have a cost-effective means for
reducing the likelihood of water penetration into wall cavities
around flanged fenestration units in open-stud building
construction. In particular, it would be desirable to have a
flashing product that utilizes pressure-sensitive adhesive to
integrate the window flange with the water resistive barrier which
minimizes the amount of adhesive used.
SUMMARY OF THE INVENTION
[0007] In at least one embodiment of the invention there is a
flashing for integrating a flanged fenestration unit and a water
resistive barrier, the flashing comprising
[0008] an elongated flexible substrate having two major surfaces
and a first lateral edge and second lateral edge defining a width
of the substrate therebetween;
[0009] an elongated adhesive layer having a width less than the
width of the substrate adhered to one of the major surfaces of the
substrate adjacent the first lateral edge of the substrate; and
[0010] a release liner covering the adhesive layer wherein the
release liner is scored or perforated along a line parallel to the
first lateral edge of the substrate and located a distance from the
first lateral edge that is less than the width of the adhesive
layer dividing the release liner into a first release liner section
adjacent the first lateral edge and a second release liner
section,
[0011] and methods for installing in a building.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a cross-sectional side view of the flashing
according to one embodiment of the invention.
[0013] FIG. 2 is a cross-sectional side view of the flashing
according to another embodiment of the invention.
[0014] FIG. 3 is a cross-sectional side view of the flashing
material flashing according to yet another embodiment of the
invention.
[0015] FIGS. 4A-4C depict methods for utilizing the flashing of the
invention in an open-stud wall construction.
[0016] FIG. 5 is a cross-sectional side view of the flashing
material flashing according to yet another embodiment of the
invention.
[0017] FIG. 6 depicts a cross-sectional side view of the flashing
material of FIG. 5 as attached to a window flange.
DETAILED DESCRIPTION OF THE INVENTION
[0018] The invention relates to an improved flashing product for
use along the vertical jambs, head, and sill of a flanged
fenestration unit, such as a window, that integrates the peripheral
flange of the fenestration unit with a water resistive barrier
installed over the framing members of the building. The use of the
improved flashing product prevents the ingress of moisture into the
wall cavity surrounding the fenestration unit. It should be
appreciated that when the term "window" is used, other types of
fenestration units, such as doors, skylights, vents, utility supply
boxes, and other items that are made to fit into openings in
structures, such as buildings, are contemplated.
[0019] FIG. 1 illustrates a cross-sectional side view of the
flashing 10 as one embodiment of the invention. It should be noted
that the drawings presented herein are not to scale and are
non-limiting.
[0020] The flashing 10 comprises a substrate 12 having an adhesive
layer 14 partially covering one surface near a lateral edge 16 of
the substrate. The adhesive layer is covered by release liner 18.
Advantageously, the release liner 18 is scored or perforated (as
indicated by the dotted line) along a line parallel to lateral edge
16 for ease of folding the release liner and adhesive layer along
the line as well as for ease of separately removing release liner
sections 18a and 18b to separately expose, respectively, underlying
sections 14a and 14b of the adhesive layer. If desired, film 16 is
also scored to aid in folding the film along the score line.
[0021] The adhesive layer 14 integrates the window flange and the
WRB in use, as adhesive layer section 14a attaches directly to the
WRB and adhesive layer section 14b attaches directly to the window
flange. In order to install the flashing of the invention to a
window installed in a building opening in open-stud construction,
the lateral edge sections of the release liner and adhesive layer
(18a and 14a, respectively) and the attached lateral edge portion
of substrate 12 are folded back along the scored line in the
release liner 18 such that the substrate 12 is folded onto itself.
Release liner section 18b is removed from the flashing and the
underlying section of adhesive 14b is exposed and adhered to the
window flange. Subsequently, release liner section 18a is also
removed, exposing the adhesive of the adhesive layer section 14a so
that it is available to be adhered to the WRB when the WRB is
installed. The integration of the window flange and the WRB
prevents the ingress of water into the wall cavity behind the WRB
around the window.
[0022] The substrate 12 of the flashing of the invention can be a
film, sheet metal, nonwoven fabric, woven fabric, paper, rigid
plastic, or a combination thereof. The substrate is liquid water
impermeable and can be either water vapor permeable or water vapor
impermeable. The substrate can be a material that has been made
water impermeable by the use of a water impermeable coating. The
substrate can be a nail-sealable film such as Titanium-UDL.RTM.
roof underlayment commercially available from InterWrap, Inc. of
Canada. The flashing can be at least 9 inches (22.9 cm) wide if
required by applicable industry standards, e.g., ASTM E 2112;
otherwise it can be less than 9 inches (22.9 cm) wide.
[0023] The substrate 12 should be dimensionally stable and durable
under the conditions of temperature and humidity experienced by the
flashing in use. The substrate should not shrink or curl which
could result in delamination of the flashing or separation of the
flashing from the framing member or window flange. Such separation
could create channels through which water could migrate into the
wall cavity surrounding the window flange. For ease of installation
of the flashing of the invention, the substrate should have
sufficient stiffness so it does not easily fold over on itself at
the upper corners of the window. The substrate is advantageously
tear resistant.
[0024] The substrate 12 should not react with the adhesive layer 14
in a manner detrimental to the structural integrity and dimensional
stability of the substrate. In the case of a polymeric substrate,
the substrate is made of a polymer having a sufficiently high
softening temperature. Suitable polymers include polyethylene,
polypropylene, polyethylene terephthalate, polyamide, or a blend or
copolymer thereof. The substrate can include optional additives
such as UV stabilizers, antioxidants, antimicrobial agents,
pigments, etc. The substrate 12 can optionally be translucent if it
is desirable for the framing elements 20 to be visible behind the
installed flashing 10.
[0025] For enhanced adhesion with the adhesive layer 14, the
substrate 12 can be subjected to a surface treatment, such as
corona treatment or micro-embossing. The substrate can also be
subjected to corona treatment for improved ink adhesion.
[0026] The adhesive used in adhesive layer 14 has good adhesion to
the material of the substrate 12 as well as to a wide variety of
construction materials, e.g., wood, aluminum, vinyl, and commonly
used water resistive barriers such as DuPont.RTM. Tyvek.RTM.
HomeWrap available from E. I. du Pont de Nemours & Co.,
Wilmington, Del. (DuPont). The adhesive is stable under conditions
of heat and moisture over an extended period of time. Suitable
adhesives for use in the flashing of the invention include butyl
rubber adhesive, bituminous adhesive, acrylic, or combinations
thereof (layers and blends). Additionally, the adhesive can be
neoprene, a polymer based on EPDM (ethylene propylene diene
monomer), or other pressure sensitive adhesives generally used in
construction applications.
[0027] The release liner 18 can optionally be provided with some
level of water and UV resistance for protection in limited outdoor
exposure during building construction. The outer surface of the
release liner can be coated with a water resistant resin such as
linear low density polyethylene, so that the adhesive bonds well to
the outer surface of the release liner at locations where one piece
of flashing crosses over another piece having the release liner
covering the outer adhesive surface still in place during use, such
as at the upper corners of a window. It is desirable for this
release liner to be removed so that adhesive-to-adhesive contact
occurs at these crossover locations. It is desirable for the
release liner to be thin and flexible so that it will wind without
excessive buckling when the flashing is wound onto a roll with the
outer release liner on the inside of the roll. The flashing
according to this embodiment of the invention is cost effective
since an adhesive layer is needed only on one side of the
flashing.
[0028] The invention also relates to a method for integrating WRB
with the peripheral flange of a fenestration unit installed in a
rough opening in a wall, in order to prevent the ingress of
moisture into a wall cavity around the fenestration unit. A method
for installing the above-described flashing of the invention is
described as follows. A fenestration unit such as a window is first
installed in a rough opening such that the peripheral flange
overlaps the adjacent framing members. The flange is advantageously
secured to the underlying framing members via screws, nails etc. As
shown in FIG. 1, the portion of the flashing between edge 16 and
the scored line is folded back so that substrate 12 is folded onto
itself. Release liner section 18b is removed and adhesive layer
section 14b of the flashing is adhered to the window flange.
Release liner section 18a is removed and adhesive layer section 14a
of the flashing is exposed. Finally, WRB is installed over the wall
surrounding the window and adhered to exposed adhesive layer 14a of
the flashing along the sides and uppermost portion of the window.
At the lowermost portion of the fenestration unit, the WRB is
advantageously covered by the substrate of the flashing so that the
flashing covers the WRB in a shingling fashion and liquid water is
directed to the exterior of the WRB and away from the wall
cavity.
[0029] According to another embodiment of the invention, as
illustrated in FIG. 2, the flashing 110 can have adhesive layers
114a and 114b adhered to each surface of the substrate 112 adjacent
the lateral edge 116. The adhesive layer on each surface is covered
by release liners 118a and 118b. The flashing 110 can be made by
extruding the adhesive layers 114a and 114b directly onto each
surface of the substrate.
[0030] Alternatively, another flashing embodiment 120 can be made
as illustrated in FIG. 3. The flashing material 120 includes
adhesive layer 214 adhered to one surface of substrate 212 such
that a first portion of the adhesive layer 214b is adhered to the
substrate adjacent lateral edge 216 and a second portion of the
adhesive layer 214a extends significantly beyond lateral edge 216.
Further, the second portion of the adhesive layer 214a can extend
as much as about half of its width beyond lateral edge 216.
Adhesive layer portions 114a and 114b can have different widths
different than the width of 114b. The surface of the adhesive layer
section 214b opposite the substrate is covered by release liner
section 218b which is delineated by the scored line (as indicated
by the dotted line) opposite the lateral edge 216. Optionally, an
intermediate release liner 219 covers the other side of the portion
of the adhesive layer 214a extending beyond edge 216 of the
substrate. Intermediate release liner 219 is removed from the
starting flashing material 120 prior to installation, and second
portion of adhesive layer 214a is folded under lateral edge 216 to
contact substrate 212, thus forming a flashing structure similar to
flashing 110 illustrated in FIG. 2. Although intermediate release
liner 219 has release coating functionality, the rest of the
substrate 212 does not have release coating functionality, but
rather remains adhered to the adhesive layer.
[0031] A method for installing the above-described embodiment of
the flashing of the invention in order to integrate WRB with the
peripheral flange of a fenestration unit installed in a rough
opening in a wall to prevent the ingress of moisture into the wall
around the fenestration unit, is described as follows. A
fenestration unit such as a window is first installed in a rough
opening such that the peripheral flange overlaps the adjacent
framing members. The flange is advantageously secured to the
underlying framing members via screws, nails etc. A portion of the
release liner is removed to expose the adhesive layer adjacent the
lateral edge on one surface of the substrate; the exposed adhesive
is then adhered to the window flange. Subsequently, the remaining
release liner is removed, exposing the underlying adhesive layer
adjacent the lateral edge on the opposite surface of the substrate.
Finally, WRB is installed over the wall surrounding the window and
adhered to the exposed adhesive layer of the flashing along the
sides and uppermost portion of the window. The WRB is
advantageously covered by the substrate of the flashing at the
lowermost portion of fenestration unit in a shingling fashion as
described above.
[0032] Alternatively, the flashing of the invention can be
installed by removing a portion of the release liner and adhering
the flashing to the flange of the fenestration unit prior to
installing the fenestration unit in the rough opening in the
building wall. Thereafter, the remaining release liner can be
removed and WRB is adhered to the exposed adhesive layer as
described above.
[0033] FIG. 4A illustrates an open-stud construction wall
comprising framing members 20, installed window 30 and flashing 10
(or flashing 110) according to the invention installed around the
window, before the installation of WRB and before the release liner
18a on the flashing is removed. FIG. 4B illustrates the same wall
after release liner 18a on the flashing is removed to expose
adhesive layer 14a. FIG. 4C illustrates the same wall after the
installation of WRB 40.
[0034] Another embodiment of the invention is shown in FIG. 5 which
depicts the cross-section of flashing 130. The flashing includes a
first elongated adhesive layer 315 adhered to one of the major
surfaces of the substrate, the first adhesive layer being
substantially adjacent the first lateral edge 316 of the substrate
312. The first adhesive layer 315 is covered by release liner 317.
The flashing 130 also includes a second elongated adhesive layer
314, covered by a release liner 318, adhered to the other major
surface of the substrate such that the second elongated adhesive
layer does not overlap the first elongated adhesive layer in the
plane of the substrate 312. There is preferably a gap between the
portion of the substrate covered by the first adhesive layer 315
and the portion of the substrate covered by the first adhesive
layer 314. The width of each of the first and second adhesive
layers is between about 1 inch (25.4 cm) and about 3 inches (76.2
cm). Preferably, the thickness of the first adhesive layer 315 is
less than the thickness of the second adhesive layer 314.
[0035] FIG. 6 shows the cross-section of flashing 130 in use as
installed on the peripheral flange 30A of a window 30, and
integrated with WRB 40. After removal of release liner 318, the
second adhesive layer 314 is first adhered to the window flange.
The WRB 40 is positioned over the substrate 312 opposite the
adhesive layer 314 as shown. Release liner 317 is then removed,
substrate 312 is folded over the WRB and the first adhesive layer
315 is adhered to the outer surface of WRB 40. The flashing 130
secures the WRB in place, which can be further secured by the use
of tape or fasteners.
* * * * *