US2856871A - Two-piece cap flashing - Google Patents

Description

Oct. 21, 1958 I H. P.'ORTH ETAL 2,856,871

, TWO-PIECE CABFLASHING Filed June 14, 1954 3 Sheets-Sheet l Arrow/ Oct. 21, 1958 H. P. ORTH ETAL TWO-PIECE CAP FLASHING Filed June 14, 1954 \3 Sheets-Sheet 2 'oct- 1958 H. P. ORTH ETAL 2,856,871

TWO-PIECE CAP FLASHING Filed June 14, 1954 3 Sheets-Sheet 3 Patented Oct. 21, 1 958 TWO-PIECE CAP FLASHING Herbert -P. Orth, Haven-town, Pa, and Anthony F. Dawqnkas, Westmoreland, N. Y., assignors to Keystone Flashing Company, Philadelphia, Pa., a corporation of Pennsylvania Application June 14, 1954, Serial No. 436,411 4 Claims. (CL Hid-26) "flashing.

two-piece cap flashing ordinarily comprises a receiver and an insert. The receiver consists of a top panel that is embedded in the masonry structure of the parapet wall and to the outer free edge of which is integrally joined a downwardlyextending facing. integrally joined to the lower edge of this facing is .aninverted U-shaped channel structure which receives the upper edge of the insert or counter flashing. This insert has a main body portion that extends downwardly and overlaps the roof base flashing which is continued up the side of the parapet wall an apiprec'iable distance. In some instances this roofing is of sheet metal. However, in the majority of cases it is of asphalt, being. a built-up construction of multi-layer thickness with the thicknesses varying with different roofs. Thus, in some cases the roofing material proper might consist of a single layer of sheet metal, while in other cases it comprises several integrated layers of roofing material.

With the arrangement which prevailed before the adv'entofthis invention, the insert or counterflashing consists ofnothing morethan a straight piece of sheet metal with the upper edge being received in the channel of 'thereceiver and the remainder extending downwardly in overlapping relation with respect to the roofbase flashing. This arrangement presents several disadvantages. In the first instance, it is diflicult to obtain a good watertight seal between the insert and the roofing material. Moreover, there is nothing in the construction of the cap flashing itself which accommodates roofs a various thicknesses. Thus it has been the usual practice to r' on to malletting, or some other metal deforming oporation to achieve a snug engagement of the insert with "the ro'oiing'rriaterial. Then again,'when the roofing material approaches the maximum thickness employed there is a tendency forthe insert'to spring outwardlyand destroy the seal.

With the foregoing conditions in mind, the present invention hasin view as a highly important objective the provision of a two-piece cap flashing which is so designed and co'nstructed'as to always exert a yielding tendency to urge the lower edge of the insert inwardly against the roofing material. In attaining this end a receiver is employed having the usual top .panel that is embedded in the masonry wall, together with the downwardly extending facing which carries the inverted U-shaped channel. This channel structure includes an outer channel wall that is disposed at an angle with res'pect to the top panel. The channel structure also includes an inner channel wall to the lower edge of which is integrally joined an anchoring flange. The insert'cornprises a vertically extending locking flange that is received in the channel of thereceiver with the upper edgeportion th'ereof being forced towards the outer channel wallby the anchoring flange of the receiver. integrally-joined to the lower edge of this locking flange and extendingoutwardl-Y and downwardly is a cap portion which is intended to bridge or span the several layers of material in the roof base flashing and terminatesat a point spacedfrom the exposed face of the roof base flashing. Integrallyjoined to the lower edge of this cap portion andextending downwardly and inwardly is a mainbody portion or apron which is continued downwardly and inwardly suflicie'ntly far so that its effective lower edge lies within andspaced from the plane of the locking flange.

' tempt has been made to provide an interlocking between the insert and the receiver but the arrangements heretofore provided have not provensatisfactory because of certain basic defects, 'It may be stated as a general rule that if a device of this type is tobe practical theinsert must-be susceptible of being snapped into thereceiver to establish the interlock. In the known devices of this type, this snap action is accommodated by tongues, or

comparable structure, onthe insert yielding, under the theory that they will snap back into eflective locking position-after they have passed the lockingflange-onthe receiver. However, there issuch a small amount of metal present in these tongues, and this is inevitably true, in

many cases, the desired resilient or elastic action will not take place.

With the foregoing conditions in mind, another highly important object of this invention is to provide, in a. twopiece cap flashing of the character indicated, an interlock of the snaptype in which all the resiliency elasticity and yielding action takes place-in the receiver rather than in the insert. Thus, in the receiver the anchoring flange is spaced an appreciabledistance from the inner channel wall so that it may flex inwardly towards this inner channel wall, Moreover, the inner channel wall itself is susceptible of elastic movement relative to the outer channel wall and the outer channel wall itself can move relative to the facing. e

In achieving this object the locking flange of the insert is provided with spaced so-called thumbnail projections. These projections are formed by slitting the metal at the places indicated and deforming the metal above the slits into the shape of a thumbnail. This shape has some of the characteristics of a wedge so that as the locking flange is inserted between the anchoring flange and outer channel wall of the receiver the thumbnail projections function as a wedge to spread theanchor ing flange and outer channel wall and thus permit the thumbnail projections to be moved past the upper edge of the anchoring flange after which the latter, due to its inherent resiliency and elasticity, springs back into effective locking :position in which its edgeengages 'the lower edges of the thumbnail projections.

Another important object of this invention to .provide, in a two-piece cap flashing of the type indicated, a receiver in which the upper edge portion of the anchoring flange is formed as an outer extending inclined lip. This structure presents certain advantages. In the first instance it adds rigidity to the structure of the anchoring flange. Secondly, it eliminates any wavyness which might 3 be created when the receiver takes the form of a keyed thru-wall flashing. And finally, it presents the edge at the angle most advantageous for engaging the lower edges of the thumbnail projections.

Under conditions of actual construction the receiver is installed in sections. Likewise the insert is of sectional construction. This means that in actual installation an insert spans or bridges the joint between adjacent sections of the receiver. Such an arrangement obviously requires that the channels in these sections of the receiver be accurately aligned so that the interlock is properly estab lished Thus, another highly important object the invention is to provide new and improved means for aligning adjacent sections of the receiver as they are installed in a masonry wall. In carrying out this objective the facing at one end of each receiver is continued out beyond the channel structure in a tapered or wedge shaped formation. The top panel is continued out a corresponding distance. This structure in the face forms a guide tongue which is received immediately behind the facing of the next adjacent section.

Various other more detailed objects and advantages of the invention, such as arise in connection with carrying out the above-noted ideas in a practical embodiment, will in part become apparent and in part be hereinafter stated as the description of the invention proceeds.

- The invention, therefore, comprises a two-piece cap flashing consisting essentially of a receiver and an insert, with the receiver and insert having the structural features whereby a bead at the lower edge of the insert is constantly urged inwardly against the roof base flashing by the engagement of the locking flange at the upper edge of the insert in the channel of the receiver, together with a new and improved interlock between the receiver and insert, and a guide tongue for aligning the channels of adjacent sections of the receiver.

For a full and more complete understanding of the invention, reference may be had to the following descriptions and accompanying drawings wherein:

Figure 1 is a perspective view illustrating a portion of parapet wall roof base flashing and cant with the twopiece cap flashing, of this invention, installed .to seal the upper edge of the roof or base flashing.

Figure 2 is a vertical section through the wall, base flashing of roofing material and two-piece cap flashing.

Figure 3 is a view in front elevation of the insert per se. Figure 4 is a view in end elevation of the insert.

Figure 5 is a top plan view of the receiver per se.

Figure 6 is a view in front elevation of the receiver per se.

Figure 7 is a transverse vertical section taken about on the plane represented by the line 77 of Figure 6 through the receiver.

Figure 8 is a diagrammatic view illustrating the first step of inserting the locking flange of the insert into the channel of the receiver.

Figure 9 is a similar view of an intermediate position showing the anchoring flange as forced into spaced relation with respect to the outer channel wall by the thumbnail projections.

Figure 10 is another view similar to Figure 8 and 9 showing the position of the parts after the interlock has been established.

Figure 11 is a perspective view illustrating end portions of adjacent sections of the receiver in spaced relation and prior to establishment of the interlock therehetween.

Figure 12 is a perspective view depicting the two sections of the receiver with the keys interlocked; and

Figure 13 is a detailed vertical section taken about on the plane represented by the line 13-13 of Figure 12.

Referring now to the drawings, and first more particularly to Figures 1 and 12, a parapet wall is therein illustrated and referred to in its entirety by the reference r I j 4 character P. This wall P ordinarily comprises bricks 10 which are secured together in the conventional manner by mortar 11. Extending inwardly from one side of the parapet Wall E is a. roof supporting structure such as represented at 12. Ordinarily a cant 13 is included in the construction. As shown in Figure 1, a piece of roofing material 14, which in the single layer construction illustrated, would ordinarily be of sheet metal, overlaps the roof 12 and cant 13 and extends along the inner face of the wall P above the corner piece to provide the roof base flashing. As shown in Figure 2, roofing material M; which is an integrated multi-layer structure of asphalt, is substituted for the single layer 14 of Figure 1. in both cases the problem is to provide an effective water seal at the upper edge of the roof base flashing whether it be the single layer 14- cf Figure 1 or the integrated multi-layer construction of Figure 2. For this purpose the two-piece cap flashing of this invention is provided.

This two-piece cap flashing comprises a receiver which is referred to in its entirety by the reference character R and which is shown in detail in Figures 5, 6 and 7 and an insert which is identified in its entirety by the reference character I and which is shown in detail in Figures 3 and 4.

Before describing the receiver R which is illustrated in Figures 5, 6 and 7, it is to be clearly understood that this receiver may be either a keyed thru-wall flashing of the so-called saw-tooth type, as illustrated, as well as other type of keyed flashing or may be a flat panel construction which is commonly used when the receiver does not extend entirely through the Wall. Referring now more particularly to Figures 5, 6 and 7, the receiver R is shown as comprising a top panel 15 which, together With the other parts now to be described, is made of an appropriate sheet metal such as copper of appropriate thickness.

Formed on the inner edge of this top panel 15 is a hook dam 16 which, as is clearly illustrated in Figure 7, comprises a flange that is bent backwardly beyond degrees into an acute return angle. Integrally joined to the outer edge of the top panel 15 is a facing 17 and it is important to note that this joinder is effected by a bend 18 of wide radius. Integrally joined to the lower edge of the facing 17 by a bend 19 is an outer channel wall 20. This outer channel wall 20 is integrally joined to an inner channel wall 21 by a top channel bend 22. An anchoring flange 23 is integrally joined to the lower edge of the inner channel Wall 21 by a bend 24. The upper edge of this anchoring flange 23 is turned outwardly to form a lip 25.

Keys shown at 26 extend transversely throughout the entire structure. Thus these keys 26 appear in the hook dam 16, top panel 15, bend 18, facing 17, bend 19, outer channel wall 20, bend 22, inner channel wall 21, bend 24, anchoring flange 23 and lip 25. They serve to provide a good bond between the top panel 10 and mortar 11. At the same time insuring level drainage channels to the front.

As illustrated in Figure 6, the facing 17 is continued out at the righthand side beyond the channel structure and has an inclined edge 27 which defines a guide tongue 28. The top panel 10 has a comparable extent. The upper portion of the top panel 15, above the guide tongue 27, is formed with an undercut key 29 which interlocks with a similar key 30 at the other end of the next adjacent section of receiver. This being clearly illustrated in Figure 11. It is to be understood that the keys 29 and 30 are present even when the flat type of flashing is employed and the keys 26 omitted. The purpose of the keys 29 and 30 is to interlock two adjacent sections of the receiver and at the same time provide an effective water dam that inhibits longitudinal travel of water along the top face of the panel 15.

With the receiver R installed in a parapet wall, it is intended that the inner channel wall be substantially asea'sri vertical and in face-to fac'e engagement with the outer face of the parapet wall. This is important for reasons later'to become apparent.

Referring now more particularly to Figures 3 and 4, the insert I "is shown as including a locking flange 31. This locking flange 31 is formed at spaced intervals with inwardly extending so-called thumbnail projections 32. The projections 32 are formed by slitting the "metal along a line such as indicated at 33 and then'de'forming the metal inwardly above these slits in the manner depicted. Integrally joined to the lower edge of thelocking flange 31 and extending outwardly and downwardly is a cap portion 34. This cap portion has an extent sufficient to bridge or span the multi-layer roofing mateterial M of the roof base flashing regardless of its thiolc- I ness, with the 'lower edge of the cap still being spaced at least some distance from the outer-most layer of the roof base flashing.

Integrally joined to the lower edge of the cap 34 andextending inwardly and downwardly is a main body portion or apron 35; Referring now more particularly to Figure 4, the plane of the locking flange 31 is represented by the broken line 36. It will be noted that the main body portion or apron 35 is continued downwardly and inwardly sufficiently far so that its lower edge lies on the inner side of the line 36, which is representative of the plane of the locking flange 31. The lower edge portion of the apron 35 is formed with an outwardly opening V-shaped groove 37, which, by its formation in the metal presents an inner bead 38. It i this head 38 which is urged into sealing engagement with the roofing material by the resiliency of the metal in the channel structure of the receiver as rendered effective on the locking flange 31.

Referring now more particularly to Figures 8, 9 and 10, it will be noted that with the receiver R and insert I disassembled the lip25 of the anchoring flange 23 engages the outer channel wall 20. As the locking flange 31 of the insert is inserted between the anchoring flange 23 and outer channel wall 20, the thumbnail projections 32 function as a wedge and serve to spread and separate the anchoring flange 23 from the outer channel wall 29. This condition is clearly depicted in Figure 9.

As the upward movement is continued the thumbnail projections 32 finally clear the top edge of the lip 25 after which the inherent resiliency of the metal in the bends 24 and 22 causes the lip 25 to engage the inner face of the locking flange 331;. Thus this edge of the lip 25 is in abutting engagement with the lower edges of the thumbnail projections 32 to prevent withdrawal of the insert.

It will be noted that the combined effect of the lip 25 forcing upper edge portion of the locking flange 331 towards the outer channel wall 20, coupled with the tendency of the lower edge of this wall to act as a fulcrum, the tendency is to rotate the insert in a clockwise direction (speaking with reference to the showing of the drawings) to urge the bead 38 inwardly into engagement with the roofing material.

While a preferred specific embodiment of the invention is hereinbefore set forth, it is to be clearly understood that the invention is not to be limited to the exact constructions, materials and designs illustrated and described because various modifications of these details may be provided in putting the invention into practice within the purview of the appended claims.

What is claimed is:

. 1. In a two-piece cap flashing, a receiver comprising a top panel, a facing angularly disposed to said panel and integrally joined to one edge thereof, an outer chann'el wall integrally joined to the lower edge of said facing by a bend, an inner channel wall integrally joined to said outer wall by a top bend, said channel walls providing a downwardly opening channel substantially normal to said top panel an anchoring flange integrally joined to 6 the lower edge of said "inner wall by-a'bend, an insert having a locking flange received in said channel andi'n en a ement with said =outerwal1,;sa it1 anchoring flan e engaging the upper p'ortio'n'of said locking "flangeto force the latter towards-said outer channel wall, an outwardly and downwardly extending cap portion integrally joined to the lower edge of said locking flangaand aninwardly anddownwar'dly extending apron integrally joined to 'the lower "edge of said cap portion, the lower edge (if said apron being 'spacedTro'm and "disposed on the inner side of the plane of said lockingflange.

2. In a two-piece cap "flashing, afsectiOn of areceiver that is intended to be 'join'edto adjacent sections, said receiver section comprising a "top panel, a *fafci'ng 'a'ng'ularly disposed to said'panl and integrally joinedtoan edge thereof, cl1annel."structure integrally joined 'to the lower edge of said facing and presenting -aewnward y opening channel substantially normal to "saidtop "panel, said. top panel and 'facingbeing continued out beyond the channel structure 'at one'end of th'esecti'o'n with the facing being gradually diminished to; form a guide :tohgue that is adapted to be fittectinsilie the facing of-the nearedjacent section to align the channel structure of said sections, an insert having a locking flange received in said channel and in engagement with the lower edge of the outer wall thereof, a flange included as a part of said receiver and engaging said locking flange to force the latter towards said outer channel wall, an outwardly and downwardly extending cap portion integrally joined to the lower edge of said locking flange and an inwardly and downwardly extending apron integrally joined to the lower edge of said cap portion, the lower edge of said apron being spaced from and disposed on the inner side of the plane of said locking flange.

3. In a two-piece cap flashing, a receiver comprising a top panel, a facing disposed at an angle to said top panel and joined thereto by a bend, an outer channel wall underlying said facing in spaced relation thereto and integrally joined to the lower edge of said facing by a bend, an inner channel wall opposite to and spaced from said outer channel wall and integrally joined thereto by a top bend, said channel walls providing a downwardly opening channel substantially normal to said top panel, and an anchoring flange integrally joined to the lower edge of said inner channel wall by a bottom bend and having a portion extending upwardly between said channel walls, said anchoring flange having a free edge that is normally urged towards said outer channel wall by said top and bottom bends; and an insert having a locking flange inserted between said channel walls, an outwardly and downwardly extending cap portion integrally joined to the lower edge of said locking flange, and an inwardly and downwardly extending apron integrally joined to the lower edge of said cap portion, the lower edge of said apron being spaced from and disposed on the inner side of the plane of said locking flange, said locking flange engaging the bend at the bottom of said facing as a fulcrum and being engaged along a line spaced above said fulcrum by a free edge of said anchoring flange to force the upper portion of said locking flange outwardly under the influence of the resiliency and elasticity of said top and bottom bends, with said fulcrum being urged inwardly by the bend joining said panel and facing whereby the lower edge of said apron is urged inwardly against a roof base flashing with which the two-piece cap flashing is installed.

4. In a two-piece cap flashing, a receiver comprising a top panel, a facing disposed at an angle to said top panel and joined thereto by a bend, an outer channel wall underlying said facing in spaced relation thereto and integrally joined to the lower edge of said facing by a bend, an inner channel wall opposite to and spaced from said outer channel wall and integrally joined thereto by a top bend, said channel walls providing a downwardly opening channel substantially normal to said top panel,

and an anchoring flange integrally joined to the lower edge of said inner channel wall by a bottom bend and having a portion extending upwardly between said chan nel walls, said anchoring flange having a free edge that is spaced from said top bend and normally urged towards said outer channel wall by said top and bottom bends; and an insert having a locking flange inserted between said channel walls, an outwardly and downwardly extending cap portion integrally joined to the lower edge of said locking flange, and an inwardly and downwardly extending apron integrally joined to the lower edge of said cap portion, the lower edge of said apron being spaced from and disposed on the inner side of the plane of said locking flange, said locking flange engaging the bend at the bottom of said facing as a fulcrum and being engaged along a line spaced above said fulcrum by a free edge of said anchoring flange to force the upper portion of said locking flange outwardly under the influence of the resiliency and elasticity of said top and bottom bends, with said fulcrum being urged inwardly by the bend joining said panel and facing whereby the lower edge of said apron is urged inwardly against a roof base flashg 1 ing with which the two-piece cap flashing is installed, said locking flange being formed with spaced thumbnail projections of wedge-like formation having rounded points at the top and curved edges at the bottom, said locking flange with said projections being adapted to have been inserted between said anchoring flange and said outer channel wall whereby said thumbnail projections functioned as wedges to separate said anchoring flange and outer channel wall so that said projections rode past the free edge of said anchoring flange and catch thereon.

References Cited in the file of this patent UNITED STATES PATENTS 1,726,500 Norris Aug. 27, 1929 2,021,883 Berg Nov. 26, 1935 2,105,996 Byers Jan. 18, 1938 2,250,548 Ness July 29, 1941 2,271,710 Orth Feb. 3, 1942 2,469,840 Orth May 10, 1949 2,641,203 Coleman June 9, 1953

Images