US20070157528A1 - Bendable 'Z' head flashing - Google Patents
Bendable 'Z' head flashing Download PDFInfo
- Publication number
- US20070157528A1 US20070157528A1 US11/650,915 US65091507A US2007157528A1 US 20070157528 A1 US20070157528 A1 US 20070157528A1 US 65091507 A US65091507 A US 65091507A US 2007157528 A1 US2007157528 A1 US 2007157528A1
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- United States
- Prior art keywords
- flashing
- bendable
- head
- arched
- head flashing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000463 material Substances 0.000 claims description 5
- 239000011800 void material Substances 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 3
- 238000009435 building construction Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 239000004566 building material Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 5
- 239000000565 sealant Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000009432 framing Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/14—Junctions of roof sheathings to chimneys or other parts extending above the roof
- E04D13/1407—Junctions of roof sheathings to chimneys or other parts extending above the roof for flat roofs
- E04D13/1415—Junctions to walls extending above the perimeter of the roof
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
- E06B1/62—Tightening or covering joints between the border of openings and the frame or between contiguous frames
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
- E04F13/04—Bases for plaster
- E04F13/06—Edge-protecting borders
- E04F2013/061—Edge-protecting borders for arched or curved edges
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
- E06B1/006—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings of curvilinear outline
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
- E06B1/62—Tightening or covering joints between the border of openings and the frame or between contiguous frames
- E06B2001/628—Separate flexible joint covering strips; Flashings
Definitions
- the present invention relates to architectural stock flashing material used for weatherproofing the head of arch top windows and doors, and arched trim on the exterior buildings in building construction.
- flexible sheet flashing employed at the head of an opening can satisfy the building code requirement for protecting the building structure, although additional flashing can be used to provide protection to adjacent exterior siding and trim, as well as increase the weather resistance of the structure.
- ‘Z’ flashing is commonly used to divert water from the surface of building paper to the outside, away from the head of the opening.
- This type of flashing is readily available commercially in straight lengths and in various dimensions.
- the ‘Z’ adjective indicates the three leg configuration of this flashing, with the legs characteristically at right angles to each other.
- ‘Z’ flashing has also been used in addition to flexible flashing to provide extra protection to the opening and exterior wall components. Historically ‘Z’ flashing is formed from metal. More recent, flashing has been manufactured from plastics.
- ‘Z’ flashing does not easily conform to a radius, with the legs or flanges perpendicular to the curved surface resistant to bending because of the inherent geometry. Because of the resistance to bending, the installation of head flashing along curved surfaces is difficult, if attempted at all. Some sheet metal fabricators have the capacity to custom rolled “Z’ flashing to the exact radius required, which is costly and requires planning ahead.
- One window manufacture provides arched top windows with an aluminum head flashing preformed to match the window head radius, to be installed directly onto the window head frame. Flashing between siding and wood trim installed above a window with this manufacturer supplied flashing would be a custom fabrication with a different radius and length. For most installations of arched top windows, doors and curved trim there is not a satisfactory solution.
- Construction contractors or trades people have modified commercially available metal or vinyl ‘Z’ flashing in the field by cutting multiple slits into the vertical back leg or mounting flange of ‘Z’ flashing to allow bending, impairing the water diversion capability. It is also inefficient and difficult for field tradespersons to make closed end cuts of uniform length or spacing. Poorly made cuts tend to further lengthen along the cut or induce cracking in the flashing flange, while inaccurately spaced cuts do not permit a uniform radius. With field modified metal flashing, bending can also result in kinking or distortion in legs of the flashing. Flashing with numerous slits is sometimes repaired in the field with a covering of a self-adhering flexible sheet flashing.
- the present invention is an elongate vinyl plastic ‘Z’ flashing comprised of three legs, the larger back vertical attachment flange includes pre-formed notches which allow the other horizontal leg to conform to the arched radius surface of other building construction elements, such as arched head windows and doors, and arched trim.
- the bendable ‘Z’ head flashing is shaped with a flat vertical notched attachment flange, an outwardly projecting horizontal section from the bottom of the flat vertical attachment flange, and a smaller vertical drip edge section projecting downward from the outside edge of the horizontal section.
- the back vertical flange is installed against building sheathing or adjacent self-adhering window or door flashing.
- the horizontal section sits on top of a arched window or door frame, or arched trim.
- the smaller vertical drip edge extends down over the face of the underlying arched building component.
- the back vertical mounting flange has equal spaced holes near the top free edge for fastener locations, and equal spaced notches extending from the free edge towards the horizontal section.
- Each notch terminates in a circular void in proximity to the horizontal section, but at a distance to provide a small section of uninterrupted vertical flange adjacent to the horizontal flange.
- the diameter of the circular void is larger than the width of the notch, to distribute tension stresses at the base of the flat vertical mounting flange over a larger circle circumference and reduce the possibility of cracking and buckling.
- the horizontal portion or leg of the present invention can readily conform to a radius, and small effective dimensional areas of both vertical flanges can absorb tension and compression stress without undo deformation.
- the present invention is installed in sequence with the building wall moisture barrier, arched doors, windows or adjacent arched trim, before installing exterior siding.
- Building structural framing, siding and trim around windows and doors is protected from rainwater or other moisture by bendable ‘Z’ head flashing in conjunction with other building materials. Bendable ‘Z’ head flashing protects the joint between dissimilar construction components and directs moisture outward away from building moisture barriers.
- FIG. 1 shows an oblique view of a portion of bendable ‘Z’ head flashing.
- FIG. 2 is a cross section view of the bendable ‘Z’ head flashing taken along 2 - 2 in FIG. 1 .
- FIG. 3 is an oblique view of a portion of bendable ‘Z’ head flashing with a smaller horizontal leg.
- FIG. 4 is a cross section view of bendable ‘Z’ head flashing taken along 4 - 4 in FIG. 3 .
- FIG. 5 is a partial revealed front view of bendable ‘Z’ head flashing installed over a portion of arched top window.
- FIG. 6 is a cross section view of bendable ‘Z’ head flashing installed an arched top window taken along 6 - 6 in FIG. 5 .
- FIG. 7 is a cross section view of bendable ‘Z’ head flashing installed above arched trim.
- FIG. 8 is a cross section view of bendable ‘Z’ head flashing installed above an arched door or window frame.
- FIGS. 1-8 illustrate two embodiments of the present invention.
- FIGS. 1 and 2 indicate one embodiment, while FIGS. 3 and 4 show a second embodiment.
- FIGS. 5-8 show the bendable ‘Z’ head flashing integrated into different building components. Building components illustrated in FIGS. 5-8 characterize the use and installation of the present invention, but do not preclude use of bendable ‘Z’ head flashing with other building materials and construction components.
- FIG. 1 is a oblique view of a portion of a novel bendable ‘Z’ head flashing 1 .
- the rear vertical mounting flange 2 is shown with equally spaced notches 3 .
- Each notch terminates in a circular void 4 , being in proximity to the horizontal section, but maintaining a distance to provide a small section of uninterrupted vertical flange adjacent to the horizontal flange.
- notches 3 will uniformly spread apart along the upper free edge of vertical mounting flange 2 .
- the diameter of the circular void 4 is larger than the width of the notch, to distribute tension stresses at the end of the notch over a larger circle circumference and reduce the possibility of cracking and buckling.
- Holes 5 for fasteners used during installation are located between notches.
- FIG. 2 is a cross section view of the bendable ‘Z’ head flashing taken along 2 - 2 in FIG. 1 .
- FIG. 2 indicates the horizontal section 6 between the two vertical faces, with which it forms right angles.
- the preferred dimension of horizontal section 6 is 15 ⁇ 8 inches to accommodate dimensions of common building components.
- FIGS. 1 and 2 show the thicker bead 8 at the free end of vertical flange 7 . This bead helps resist buckling in the outward vertical flange 7 during curving to a radius.
- FIG. 3 is an oblique view of a portion of a novel bendable ‘Z’ head flashing. This embodiment differs from that shown in FIGS. 1 and 2 because of a smaller horizontal member 10 . All other features and use remains the same as described in FIG. 1 .
- FIG. 4 is a cross section view of bendable ‘Z’ head flashing taken along 4 - 4 in FIG. 3 .
- the preferred dimension of horizontal leg 10 is 7 ⁇ 8ths of an inch, to accommodate and match the dimension of common building components.
- FIG. 5 is a partial revealed front view of bendable ‘Z’ head flashing 1 installed over a portion of an arched top window 14 .
- the window 14 with a nail fin is installed onto an frame arched opening in the exterior building sheathing 12 .
- Building paper 18 is completed up to the spring point of the opening, awaiting completion of the following installation steps for construction component sequencing.
- the window nail fin is flashed to the surface of 12 with a self-adhering flexible flashing 16 .
- the flexible ‘Z’ head flashing 1 is then fitted, with horizontal leg 6 resting on top of a projecting portion of the arch top window 14 , vertical mounting flange 2 set on top of self-adhering flexible flashing 16 , and vertical leg 7 covering the corner of window 14 .
- the flashing 1 is held in place at the desired curve with fasteners driven through numerous mounting holes 5 into exterior building sheathing 12 .
- FIG. 5 also indicates as a result of the radius in horizontal member 6 , notches 3 in mounting flange 2 have spread apart. The extent of spreading with vary with the installed radius. Athough the ends of notches stop at holes 4 a distance above the horizontal flange, additional self-adhering flexible flashing 17 is then installed over the rear mounting flange 2 , extending past the jamb of window 14 onto adjacent building paper. The self-adhering flexible flashing 17 and the remainder of the adjacent wall 12 is then covered with building paper 18 . The building paper is covered with siding 19 . A gap 20 is left between siding 19 and the horizontal leg 6 . This gap is filled with sealant at the ends of the flexible ‘Z’ head flashing 1 .
- FIG. 6 is a cross section view of bendable ‘Z’ head flashing 1 installed over an arched top window or door taken along 6 - 6 in FIG. 5 .
- Window 14 includes a nail fin for mounting, which is also flashed with self-adhering membrane 16 .
- Siding 19 is indicated here as lap siding, but the type used does not effect the installation of the present invention.
- bendable ‘Z’ flashing 1 the horizontal leg 6 extends out past the face of arched top window or door 14 . The exact projection distance will vary with window and door manufactures, with most units accommodated within flashing 1 . Where the arched frame portion of the window or door 14 does not extend as far, bendable ‘Z’ head flashing 9 indicated in FIGS. 3 and 4 may be used instead of bendable ‘Z’ head flashing 1 .
- FIG. 7 is a cross section view of bendable ‘Z’ head flashing 1 installed over arched trim 15 .
- the arched trim follows the arch radius at its lower surface, with the upper surface radius increased by the height of the trim.
- Window 14 includes a nail fin for mounting, which is flashed with self-adhering membrane 16 .
- Siding 19 is graphically shown as lap siding, but the type used can vary and does not effect the installation of the present invention.
- the horizontal leg 6 extends out past the face of trim. The dimension of horizontal leg 6 has been sized to fit this common trim size.
- the vertical mounting flange 2 and adjacent construction materials would appear similar to that shown in FIG, 5 .
- Moisture or rainwater that originates above this head flashing 1 within siding or trim joints will run down the surface of the building paper until reaching the radius surface of the head flashing. Although the gap between siding and leg 6 allows moisture to exit from behind the siding, moisture will run along the radius towards the ends of the flashing.
- This gap 20 is to be filled with sealant at the flashing ends above window or door jamb trim.
- the joint 21 between window and trim is filled with sealant.
- FIG. 8 is a cross section view of bendable ‘Z’ head flashing 9 installed over arched trim 15 .
- the arched trim follows the arch radius of a window or door at its lower surface, with the upper surface radius increased by the height of the trim.
- the arched frame 22 does not include a nail fin, typical of a wood or composite frame window or entry door.
- building paper 18 is shown extending downward from behind the back mounting flange 2 of bendable ‘Z’ flashing 9 , although other flashing materials can be used, as recommended by the door manufacturer.
- the horizontal leg 10 of the bendable ‘Z’ flashing sits on top of the arched trim 15 .
- the dimension of horizontal leg 10 has been sized to fit the common trim size indicated.
- the flashing 9 and adjacent construction materials would appear similar to that shown in front view FIG. 5 .
- Moisture or rainwater that originates above this opening head within siding or trim joints will run down the surface of the building paper until reaching the radius surface leg 10 of the head flashing 9 .
- the gap 20 between siding 19 and leg 10 must be filled with sealant at the flashing ends above window or door jamb trim.
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Door And Window Frames Mounted To Openings (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
Abstract
Bendable ‘Z’ Head flashing is used in conjunction with other building materials above arched openings or components in the exterior walls of buildings to protect the building structure from water intrusion. Pre-formed notches in the vertically mounting flange allow the horizontal portion of the flashing to conform to arched or curved openings, the head of arch top window or door frames, and arched trim.
Description
- This non-provisional utility patent application claims the benefit of provisional patent application No. 60/756,646 filed Jan, 6, 2006, and disclosure document number 545447.
- The present invention relates to architectural stock flashing material used for weatherproofing the head of arch top windows and doors, and arched trim on the exterior buildings in building construction.
- In construction it is customary to install head flashing at the tops of openings in exterior walls, during the installation of windows, doors, and adjacent siding and trim. Uniform building codes require exterior openings exposed to the weather shall be flashed in such a manner to make them weatherproof. The intent is to keep moisture on the surface of building paper from wetting structural elements or entering the exterior wall cavity. Various flexible flashings, water resistant papers and sealants are utilized to seal around openings, windows or doors onto the building framing and sheathing at the building paper or primary moisture resistance surface, which is then covered by siding and trim. When a window or door has a integral nailing fin for fastening the assembly onto the building framing, flexible sheet flashing employed at the head of an opening can satisfy the building code requirement for protecting the building structure, although additional flashing can be used to provide protection to adjacent exterior siding and trim, as well as increase the weather resistance of the structure.
- Where a window or door does not have an integral nail fin, specific architectural sheet stock called ‘Z’ flashing is commonly used to divert water from the surface of building paper to the outside, away from the head of the opening. This type of flashing is readily available commercially in straight lengths and in various dimensions. The ‘Z’ adjective indicates the three leg configuration of this flashing, with the legs characteristically at right angles to each other. ‘Z’ flashing has also been used in addition to flexible flashing to provide extra protection to the opening and exterior wall components. Historically ‘Z’ flashing is formed from metal. More recent, flashing has been manufactured from plastics.
- With arched or curved top doors and windows, or curved siding trim, ‘Z’ flashing does not easily conform to a radius, with the legs or flanges perpendicular to the curved surface resistant to bending because of the inherent geometry. Because of the resistance to bending, the installation of head flashing along curved surfaces is difficult, if attempted at all. Some sheet metal fabricators have the capacity to custom rolled “Z’ flashing to the exact radius required, which is costly and requires planning ahead. One window manufacture provides arched top windows with an aluminum head flashing preformed to match the window head radius, to be installed directly onto the window head frame. Flashing between siding and wood trim installed above a window with this manufacturer supplied flashing would be a custom fabrication with a different radius and length. For most installations of arched top windows, doors and curved trim there is not a satisfactory solution.
- Construction contractors or trades people have modified commercially available metal or vinyl ‘Z’ flashing in the field by cutting multiple slits into the vertical back leg or mounting flange of ‘Z’ flashing to allow bending, impairing the water diversion capability. It is also inefficient and difficult for field tradespersons to make closed end cuts of uniform length or spacing. Poorly made cuts tend to further lengthen along the cut or induce cracking in the flashing flange, while inaccurately spaced cuts do not permit a uniform radius. With field modified metal flashing, bending can also result in kinking or distortion in legs of the flashing. Flashing with numerous slits is sometimes repaired in the field with a covering of a self-adhering flexible sheet flashing. When a repair is made it can be labor intensive and ineffective. Slits made into the total height of the flashing back leg are difficult to properly repair with flexible sheet flashing, as the sheet material must be carefully placed into the curving corner formed between the back vertical leg and horizontal leg of the flashing, and there is insufficient lap distance between the self-adhering flexible sheet flashing and the notch made in the underlying ‘Z’ flashing.
- For the reasons stated above, it would be very desirable to provide a bendable ‘Z’ flashing for weatherproofing the head of arch top windows, arched door heads, and arched trim.
- The present invention is an elongate vinyl plastic ‘Z’ flashing comprised of three legs, the larger back vertical attachment flange includes pre-formed notches which allow the other horizontal leg to conform to the arched radius surface of other building construction elements, such as arched head windows and doors, and arched trim.
- In accordance with the invention, the bendable ‘Z’ head flashing is shaped with a flat vertical notched attachment flange, an outwardly projecting horizontal section from the bottom of the flat vertical attachment flange, and a smaller vertical drip edge section projecting downward from the outside edge of the horizontal section. The back vertical flange is installed against building sheathing or adjacent self-adhering window or door flashing. The horizontal section sits on top of a arched window or door frame, or arched trim. The smaller vertical drip edge extends down over the face of the underlying arched building component.
- For the length of the bendable ‘Z’ head flashing, the back vertical mounting flange has equal spaced holes near the top free edge for fastener locations, and equal spaced notches extending from the free edge towards the horizontal section. Each notch terminates in a circular void in proximity to the horizontal section, but at a distance to provide a small section of uninterrupted vertical flange adjacent to the horizontal flange. The diameter of the circular void is larger than the width of the notch, to distribute tension stresses at the base of the flat vertical mounting flange over a larger circle circumference and reduce the possibility of cracking and buckling.
- When the flashing is curved during installation, the notches will widen adjacent to the upper free edge of the vertical mounting flange, and the circular voids will deform to an oval shape. Because of the flexible composition, the horizontal portion or leg of the present invention can readily conform to a radius, and small effective dimensional areas of both vertical flanges can absorb tension and compression stress without undo deformation.
- The present invention is installed in sequence with the building wall moisture barrier, arched doors, windows or adjacent arched trim, before installing exterior siding. Building structural framing, siding and trim around windows and doors is protected from rainwater or other moisture by bendable ‘Z’ head flashing in conjunction with other building materials. Bendable ‘Z’ head flashing protects the joint between dissimilar construction components and directs moisture outward away from building moisture barriers.
- The present invention can be utilized in many ways. The following descriptions and graphic indications represent potential uses of the invention to characterize the idea and general usefulness, and are not intended to limit the invention to that described or depicted herein. Notation numbers used within the FIGS. correspond to the same features or components throughout the drawings.
- Referring to the views contained on
drawings sheets 1 through 6: -
FIG. 1 shows an oblique view of a portion of bendable ‘Z’ head flashing. -
FIG. 2 is a cross section view of the bendable ‘Z’ head flashing taken along 2-2 inFIG. 1 . -
FIG. 3 is an oblique view of a portion of bendable ‘Z’ head flashing with a smaller horizontal leg. -
FIG. 4 is a cross section view of bendable ‘Z’ head flashing taken along 4-4 inFIG. 3 . -
FIG. 5 is a partial revealed front view of bendable ‘Z’ head flashing installed over a portion of arched top window. -
FIG. 6 is a cross section view of bendable ‘Z’ head flashing installed an arched top window taken along 6-6 inFIG. 5 . -
FIG. 7 is a cross section view of bendable ‘Z’ head flashing installed above arched trim. -
FIG. 8 is a cross section view of bendable ‘Z’ head flashing installed above an arched door or window frame. -
FIGS. 1-8 illustrate two embodiments of the present invention.FIGS. 1 and 2 indicate one embodiment, whileFIGS. 3 and 4 show a second embodiment.FIGS. 5-8 show the bendable ‘Z’ head flashing integrated into different building components. Building components illustrated inFIGS. 5-8 characterize the use and installation of the present invention, but do not preclude use of bendable ‘Z’ head flashing with other building materials and construction components. -
FIG. 1 is a oblique view of a portion of a novel bendable ‘Z’ head flashing 1. The rearvertical mounting flange 2 is shown with equally spacednotches 3. Each notch terminates in acircular void 4, being in proximity to the horizontal section, but maintaining a distance to provide a small section of uninterrupted vertical flange adjacent to the horizontal flange. When thehorizontal leg 6 is curved during installation to conform to a radius,notches 3 will uniformly spread apart along the upper free edge of vertical mountingflange 2. The diameter of thecircular void 4 is larger than the width of the notch, to distribute tension stresses at the end of the notch over a larger circle circumference and reduce the possibility of cracking and buckling.Holes 5 for fasteners used during installation are located between notches. -
FIG. 2 is a cross section view of the bendable ‘Z’ head flashing taken along 2-2 inFIG. 1 . -
FIG. 2 . indicates thehorizontal section 6 between the two vertical faces, with which it forms right angles. In this embodiment of the present invention, the preferred dimension ofhorizontal section 6 is 1⅝ inches to accommodate dimensions of common building components. - Both
FIGS. 1 and 2 show thethicker bead 8 at the free end ofvertical flange 7. This bead helps resist buckling in the outwardvertical flange 7 during curving to a radius. -
FIG. 3 is an oblique view of a portion of a novel bendable ‘Z’ head flashing. This embodiment differs from that shown inFIGS. 1 and 2 because of a smallerhorizontal member 10. All other features and use remains the same as described inFIG. 1 . -
FIG. 4 is a cross section view of bendable ‘Z’ head flashing taken along 4-4 inFIG. 3 . In this view the preferred dimension ofhorizontal leg 10 is ⅞ths of an inch, to accommodate and match the dimension of common building components. -
FIG. 5 is a partial revealed front view of bendable ‘Z’ head flashing 1 installed over a portion of an archedtop window 14. In sequence of preferred installation, thewindow 14 with a nail fin is installed onto an frame arched opening in theexterior building sheathing 12. Buildingpaper 18 is completed up to the spring point of the opening, awaiting completion of the following installation steps for construction component sequencing. The window nail fin is flashed to the surface of 12 with a self-adheringflexible flashing 16. After cutting to the proper length of the arc, the flexible ‘Z’ head flashing 1 is then fitted, withhorizontal leg 6 resting on top of a projecting portion of the archtop window 14, vertical mountingflange 2 set on top of self-adheringflexible flashing 16, andvertical leg 7 covering the corner ofwindow 14. The flashing 1 is held in place at the desired curve with fasteners driven through numerous mountingholes 5 intoexterior building sheathing 12. -
FIG. 5 also indicates as a result of the radius inhorizontal member 6,notches 3 in mountingflange 2 have spread apart. The extent of spreading with vary with the installed radius. Athough the ends of notches stop at holes 4 a distance above the horizontal flange, additional self-adheringflexible flashing 17 is then installed over therear mounting flange 2, extending past the jamb ofwindow 14 onto adjacent building paper. The self-adheringflexible flashing 17 and the remainder of theadjacent wall 12 is then covered with buildingpaper 18. The building paper is covered withsiding 19. Agap 20 is left betweensiding 19 and thehorizontal leg 6. This gap is filled with sealant at the ends of the flexible ‘Z’ head flashing 1. -
FIG. 6 is a cross section view of bendable ‘Z’ head flashing 1 installed over an arched top window or door taken along 6-6 inFIG. 5 .Window 14 includes a nail fin for mounting, which is also flashed with self-adheringmembrane 16.Siding 19 is indicated here as lap siding, but the type used does not effect the installation of the present invention. In bendable ‘Z’ flashing 1, thehorizontal leg 6 extends out past the face of arched top window ordoor 14. The exact projection distance will vary with window and door manufactures, with most units accommodated within flashing 1. Where the arched frame portion of the window ordoor 14 does not extend as far, bendable ‘Z’ head flashing 9 indicated inFIGS. 3 and 4 may be used instead of bendable ‘Z’ head flashing 1. -
FIG. 7 is a cross section view of bendable ‘Z’ head flashing 1 installed overarched trim 15. The arched trim follows the arch radius at its lower surface, with the upper surface radius increased by the height of the trim.Window 14 includes a nail fin for mounting, which is flashed with self-adheringmembrane 16.Siding 19 is graphically shown as lap siding, but the type used can vary and does not effect the installation of the present invention. In bendable ‘Z’ flashing 1, thehorizontal leg 6 extends out past the face of trim. The dimension ofhorizontal leg 6 has been sized to fit this common trim size. The vertical mountingflange 2 and adjacent construction materials would appear similar to that shown in FIG, 5. Moisture or rainwater that originates above this head flashing 1 within siding or trim joints will run down the surface of the building paper until reaching the radius surface of the head flashing. Although the gap between siding andleg 6 allows moisture to exit from behind the siding, moisture will run along the radius towards the ends of the flashing. Thisgap 20 is to be filled with sealant at the flashing ends above window or door jamb trim. The joint 21 between window and trim is filled with sealant. -
FIG. 8 is a cross section view of bendable ‘Z’ head flashing 9 installed overarched trim 15. The arched trim follows the arch radius of a window or door at its lower surface, with the upper surface radius increased by the height of the trim. Thearched frame 22 does not include a nail fin, typical of a wood or composite frame window or entry door. In thisview building paper 18 is shown extending downward from behind theback mounting flange 2 of bendable ‘Z’ flashing 9, although other flashing materials can be used, as recommended by the door manufacturer. Thehorizontal leg 10 of the bendable ‘Z’ flashing sits on top of thearched trim 15. The dimension ofhorizontal leg 10 has been sized to fit the common trim size indicated. The flashing 9 and adjacent construction materials would appear similar to that shown in front viewFIG. 5 . Moisture or rainwater that originates above this opening head within siding or trim joints will run down the surface of the building paper until reaching theradius surface leg 10 of the head flashing 9. Thegap 20 betweensiding 19 andleg 10 must be filled with sealant at the flashing ends above window or door jamb trim. - Useful embodiments of the invention have been described and illustrated, including depictions of building components necessary to integrate the invention with various surrounding building materials. It is understood that the words used are descriptions rather than limitations, and the present invention is not limited to the embodiments described above, but encompass any and all embodiments within the scope of the following claims.
Claims (5)
1. An elongated bendable ‘Z’ head flashing article used in building construction above arched exterior wall openings, said flashing comprised of:
a first vertical member having a free edge and extending down towards the second outwardly projecting horizontal member. Said vertical member having a series of notches forming straight edges extending towards said second horizontal member and ending in a circular void.
a second outward projecting horizontal member connected at a right angle to the first member and extending to a third vertical member.
a third vertical member connected at a right angle to and extending down from the second member to a free edge.
2. A bendable ‘Z’ head flashing article as recited in claim 1 , wherein said circular voids are in proximity to the second horizontal member.
3. A bendable ‘Z’ head flashing article as recited in claim 1 , wherein said circular voids are spaced from the second horizontal member.
4. A bendable ‘Z’ head flashing article as recited in claim 1 , wherein the free edge of said third vertical member has a bead of greater diameter than the adjacent material thickness of the third member.
5. A bendable ‘Z’ head flashing article as recited in claim 1 , said bendable ‘Z’ head flashing article being formed of plastic material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/650,915 US20070157528A1 (en) | 2006-01-06 | 2007-01-06 | Bendable 'Z' head flashing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75664606P | 2006-01-06 | 2006-01-06 | |
US11/650,915 US20070157528A1 (en) | 2006-01-06 | 2007-01-06 | Bendable 'Z' head flashing |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070157528A1 true US20070157528A1 (en) | 2007-07-12 |
Family
ID=38231399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/650,915 Abandoned US20070157528A1 (en) | 2006-01-06 | 2007-01-06 | Bendable 'Z' head flashing |
Country Status (1)
Country | Link |
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US (1) | US20070157528A1 (en) |
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US20090229193A1 (en) * | 2008-03-14 | 2009-09-17 | Ellingson Robert T | Archable Flashing |
US20100139178A1 (en) * | 2008-12-08 | 2010-06-10 | Benjamin Obdyke Incorporated | Flexible Flashing Material And Method of Manufacture |
US20110197520A1 (en) * | 2010-02-18 | 2011-08-18 | Innovations & Ideas, Llc | Laminate system |
US20120042604A1 (en) * | 2006-07-07 | 2012-02-23 | Walda Michael E | Slip sheet for construction |
US20120174495A1 (en) * | 2011-01-06 | 2012-07-12 | Azek Building Products, Inc. | Universal Skirt Board |
USD861196S1 (en) * | 2017-03-15 | 2019-09-24 | Clarkwestern Dietrich Building Systems Llc | Drip flange with backing strip |
USD882125S1 (en) * | 2018-01-15 | 2020-04-21 | Angle Wrap Ltd. | Wrap |
US20200199865A1 (en) * | 2018-12-21 | 2020-06-25 | James Hardie Technology Limited | Multifunctional flashing device |
USD904649S1 (en) | 2019-09-25 | 2020-12-08 | Clarkwestern Dietrich Building Systems Llc | Weep screed |
US11131098B1 (en) * | 2020-06-17 | 2021-09-28 | Louisiana-Pacific Corporation | Drip cap water management device and system |
US20230034789A1 (en) * | 2021-07-27 | 2023-02-02 | Jeld-Wen, Inc. | Collapsible drip cover for sliding fenestration unit |
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US20230034789A1 (en) * | 2021-07-27 | 2023-02-02 | Jeld-Wen, Inc. | Collapsible drip cover for sliding fenestration unit |
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Legal Events
Date | Code | Title | Description |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |