CN1890441A - flashing - Google Patents

Abstract

Flashing (10) comprising an elongate body (12) for overlying a member J, and legs (20) extending over at least part of the length of the body and protruding from either side of the body. The flashing has a configuration prior to being superimposed on the member such that, when positioned at the member, one or all of the legs are biased towards the respective member side. The leg is removable from the body along a severance line (24). In addition, wings (16) can extend from either side of the body (12) over at least a portion of its length. One, some or all of the wings are removable from the body along a severance line (22).

Description

flashing

technical field

The present invention relates to flashings widely used in the construction industry, primarily for covering joists, beams, supports, wall plates, rafters and the like.

Background technique

Flashing is used in the building industry to provide a barrier against the penetration of moisture into and through joists, rafters, beams, bearings, wall plates, etc., particularly where the members are made of moisture-sensitive materials such as wood affected by the material the case is made of.

Known flashings comprise metal strips or metal-containing plates cut and positioned according to said components. It is also known to use adhesive tape at metal flashings.

US 5,148,644 discloses a masking strip of rubber or plastic. In column 2, lines 1 and 2, indicate that the strip is dimensioned such that the distance between the sides corresponds substantially to the width of the wooden member on which the strap is placed.

Contents of the invention

In a first aspect of the present invention there is provided a flashing comprising an elongated body adapted to be superimposed on a member, and extending over at least part of the length of the body and from any side protruding legs, prior to being superimposed on said member, said flashing has a configuration whereby, when positioned on said member, one or all of the legs are biased towards the corresponding side.

Thereby, the flashing may be provided with an inherent biasing force which allows better clamping and/or positioning of the flashing on the member on which it is placed. This biasing force can be pre-set within the body of the flashing and then transferred to the legs when the flashing is placed on the member, and/or can be pre-set on any or all of the legs Inside. In one form, both legs may have said biasing force.

Additionally, while the legs may be spaced apart a distance approximately equal to the member width (for example, flashing leg spacing may correspond to one or more standard member widths), the leg spacing may be greater than or within the elastic The case of the flashing is slightly smaller than the member width and is still configured to be clamped to the member.

In one form, the body can have a contoured shape. For example, the legs can extend inwardly from the concave surface of the body. In this way, the legs may assume a substantially flat configuration when the flashing is positioned on the member. This contouring provides a means by which biasing forces can be preconfigured within the flashing.

In one form, the flashing is made of a resilient material. The use of resilient materials results in noise reduction (particularly when used on metal members such as metal joists) and the ability to absorb shock between adjacent members (i.e. between members where flashing is provided) . Additionally, when a nail or screw is driven into the flashing, the elastic properties cause the elastic material to clamp around the nail or screw, thereby preventing the passage of water, moisture, liquids and dirt. The use of an elastic material also enhances the inherent biasing force of the flashing or each leg.

The term "elastic" is intended to include a broad range of polymers which possess elasticity and/or shape memory and include such as natural rubber and synthetic rubber such as EPDM rubber, flexible and Elastomeric polymeric resins, and other butadiene and styrene polymers and copolymers, nylon, etc. EPDM rubber is particularly suitable because it has excellent UV, ozone and chemical resistance, and is resistant to aging. Additionally, it is resistant to most paints, lacquers, oils, solvents, acids and cleaners.

As used herein, the term "member" includes joists, beams, pedestals, wall plates, rafters, battens, and the like.

In a second aspect, the present invention provides a flashing comprising an elongate body adapted to be superimposed on a member, and at least A portion of the legs, one, some or all of the legs may be detached from the body along a corresponding severing line.

In a third aspect, the present invention provides a flashing comprising an elongated body adapted to be superimposed on a member, and extending laterally from either side of said body and extending across the length of said body At least a portion of the wings, one, some or all of the wings are detachable from the body along respective severing lines.

By having said legs and wings separable, a variety of flashing shapes can be formed, allowing for adaptation to various other adjacent members which are abutted against or closely spaced. For example, when all legs and wings are removed, the resulting flashing comprises only the elongated body, or, when a leg or an adjacent wing is removed and the flashing is applied to the first When one member is formed, an adjacent second member can abut directly against the first member where the legs and wings are removed.

In one form, the flashing includes two legs extending the entire length of the body on opposite sides of the body, however, on opposite sides of the body along the It is also feasible to provide discontinuous legs over the whole or part of the length of the body.

In one embodiment, prior to positioning the flashing on the member, the legs on opposite sides of the body protrude substantially opposite each other. In this regard, the flashing can be extruded or molded such that the legs in the finished configuration protrude substantially towards each other such that the flashing has an inherent biasing force. Thus, when the legs are on either side of the member, they are biased towards the respective side. This allows the flashing to be clamped to the member, making it easier to use and trying to prevent it from accidentally falling off. For example, when the flashing is used in an inverted or upright configuration, the legs clamp onto the member and prevent the flashing from falling out of said member.

Additionally, by providing legs extending the entire length of the body on opposite sides of the body, the flashing is able to prevent the propagation of stains from the sides of the member to which the flashing is mounted (for example from Resin stains, water stains, etc. that appear on or on wooden elements, or that seep from overlapping, abutting or adjacent elements).

In another embodiment, the flashing further comprises wings extending laterally from said body out of said legs (ie, wings are provided in addition to legs). Again, the wings may extend across the entire length of the body on opposite sides of the body, however, on opposite sides of the body are provided Discontinuous wings of is also feasible. The wings allow the flashing to be stacked on adjacent members and also to be stackable on adjacent flashings to provide a more comprehensive barrier against moisture, dust, noise and the like.

Along and adjacent to where each wing connects to the body, a cut-off line may also be provided to allow removal of the wing. In other words, all or discontinuous lengths of the wings may be removed, allowing the member to be in close proximity to another member, and allowing adjacent members to abut together.

The wings may have an elongated rectangular shape and may be correspondingly joined to the body along their opposite long sides. In a further variant, each wing tapers from a relatively thicker portion where it connects to the body to a relatively thinner distal end (ie the cross-sectional thickness of the wing gradually decreases towards its distal end) . This tapered configuration can reduce variations in flashing height in an adjacent flashing member when the wing is overlaid on an adjacent flashing member, such as an adjacent member. This wing can also be fastened directly or indirectly to an adjacent member (eg by nails, screws, adhesive, etc.).

In one embodiment, along and adjacent to where each leg is attached to the body, a severing line is provided so that all or any of the legs can be suitably removed from the body in such a way that Similar to how you removed the wings. Again, removal of one or more legs allows adjacent members to be closely positioned or abutted against each other.

The body may have an elongated rectangular shape such that it can be positioned along a corresponding elongated rectangular face of a member (eg, the upper face of a joist, stand, etc.). The legs may also have an elongated rectangular shape, respectively joined to the body along opposite elongated sides of the body (e.g. so that they can extend along corresponding rectangular sides of a member such as a joist) . Each leg may also taper distally from its junction with the body, or may have a constant thickness.

In a fourth aspect, the present invention provides an arrangement between first and second members, wherein a flashing as defined in the first, second or third aspect is mounted in the upper working surface of each member such that The flashing of one member is superimposed on the flashing of another member.

In a fourth aspect, selected wings and/or legs of the flashing of each member may be removed to reduce or eliminate flashing overlap.

The arrangement may be defined as a junction (eg, butt joint) between the first and second members.

Description of drawings

While any other form would fall within the scope of the flashing as defined in the Summary of the Invention, specific flashing embodiments will now be described with reference to the accompanying drawings, by way of example only, in which :

Figures 1A, 1B and 1C respectively show a top view, an end view and a bottom view of one end of a flashing embodiment;

Figure 2 shows a perspective view of the end of the flashing in Figure 1;

Figure 3 shows a side view of the end of the flashing in Figure 1;

Figure 4 shows an enlarged end view similar to Figure 1B and detailing the cut-off lines in the flashing;

Figures 5A-5F show end views of various flashing configurations in which components of the flashing have been removed for different applications; and

Figures 6-15 illustrate various configurations for use of the flashing of Figures 1-5.

Detailed ways

Referring first to FIGS. 1-3, flashing embodiment 10 includes an elongated body 12 having a centerline 14 formed (eg, recessed or raised) or printed thereon such that the body Can be set centrally on members such as joists etc. The centerline 14 also provides a guide for precise nailing/screwing of stacked components such as cover panels.

Projecting laterally from respective longitudinal sides of the body 12 are two wings 16 . Each wing is attached to the body by a respective raised area 18 which supports flexing of the wing relative to the body.

It can also be seen that each wing tapers in thickness from said raised area outwards towards the free end. As such, each wing is relatively thin adjacent its free end, which allows it to be superimposed on an adjacent flashing (described below). Additionally, each wing may extend the entire length of the body, or may be provided as a series of discrete wings spaced along a respective longitudinal side of the body. As another alternative, in use, a discrete wing can be cut, torn or severed from the larger wing, again depending on its application.

Extending downward from adjacent longitudinal sides of the body are two legs 20 . Each leg 20 is connected to the body adjacent a respective raised region 18, each leg 20 forming an acute angle a with the body (FIG. 1B). Thus, prior to positioning the flashing on the member, and as can be seen in Figure 1B, the legs generally face each other, which provides the flashing with a pre-application configuration such that it can be clamped to the member, as described below.

Alternatively, one of the legs may extend approximately orthogonally from its junction with the body, while the other leg forms an acute angle, still providing a pre-applied configuration for the flashing so that it can clip attached to the component.

The thickness of each leg can also taper from the body outwards towards its free edge. This makes the legs more rigid adjacent to the body and relatively less rigid away from the body. This also helps keep the inherent biasing force of the legs properly oriented, as shown in FIGS. 1B and 2 .

Again, each leg can extend the entire length of the body, or can be provided as a series of discrete legs spaced along the entire length of the body. Alternatively, these discontinuous legs can be formed by cutting, tearing or severing from the remaining leg length.

As best shown in FIGS. 1B and 4 , body 12 has a contoured profile. Legs 20 extend inwardly from the concave surface of the body. Then, when the flashing 10 is placed on a member, the body 12 assumes a generally flat configuration (FIG. 7). However, the previously contoured body profile now provides a biasing force which is transmitted to the legs 20 such that they clamp against the sides of the respective members.

In an alternative embodiment, the body 12 can be arranged in a generally flat manner, with one or typically both legs 20 facing substantially facing each other. In this way, when the flashing 10 is placed on a member, the biasing force is provided by one or both legs such that the legs clamp against the sides of the respective member.

As best shown in FIGS. 1C and 4 , where the wing 16 connects to the raised area 18 , a severance line 22 is provided. This allows each wing to be partially or fully cut, severed or torn from the body (eg, as shown in Figures 5A, 5B, 5C, 5F and 13). Similarly, where each leg is connected to the body 12, a cutting line 24 is provided. Again, this allows each leg to be partially or fully cut, severed or torn from the body (eg, as shown in Figures 5A, 5D, 5E, 5F and 14). In addition, the cut-off lines 22, 24 need not be at the point of attachment of the wings/legs to the body and, for some applications, can be located midway along the wings/legs.

Referring now to Figures 5A to 5F, it can be seen that there are many different ways in which the wings and legs can be removed. Each of these allows flashings to be positioned in parallel or at various angles to adjacent flashings on adjacent members, and to allow flashings to be positioned in various other ways on the member to which they are mounted. position.

Referring now to Figure 6, a flashing 10 according to the present invention is shown positioned on a member in the form of a joist J, the end of which rests against a wall W (which could also be a beam or the like). Joist J also sits on top of support B. As shown, a portion of each leg 20 is cut or torn or removed to define an end region 26 of the body 12 . As shown, this end region overlaps the wall W upwardly along with the wing 16 .

This lap forms a barrier at the junction of the joist J to the wall W to keep out water, moisture, liquids, dirt, etc. This end region can also be pressed sealingly against the wall (eg by nailing, screwing, gluing, etc.). In addition, wings 16 overhang laterally on either side of the joist at the end regions to provide a shading effect on the junction.

As best shown in FIGS. 7 and 8 , when the flashing 10 is mounted to the joists, the legs 20 are pressed outwardly by the respective side walls of the joists J. As shown in FIG. The legs are clamped on either side of the joists because the flashing resists the pre-configured internal bias of this outward movement. This thus makes it possible to place it on superimposed members (eg battens, decking, etc.) and to place these members onto the joists where possible misalignment of the flashing is small.

Referring particularly to Figure 7, it can be seen how the flashing 10 shades and protects the top surface of the joist J, with the wings overhanging the sides of the joist to prevent moisture (eg rain, etc.), liquid from seeping to the top of the joist and sides, as well as keeping dirt from falling on the top and sides of the joists. Additionally, it can be seen that the legs 20 (pressed outboard by the respective joist sides) are clamped to the joists to securely hold the flashing in place. Adhesive can be applied between the flashing and joists if desired.

Nails or screws can be passed through the flashing when a stacked member (eg deck, floor, panel, etc.) is on top of the flashing. If the flashing is made of a resilient or deformable material, it tends to clamp around the nails or screws, thereby also preventing moisture, dirt, etc. from passing between the flashing and the nails/screws to the joists. Thus, the flashing can be used as a complete waterproof barrier and can prevent rot and warping of joists and the like. The flashing also prevents moisture from evaporating between the joists and the flashing, which could otherwise cause blistering, buckling, etc.

Referring now to Figure 8, parallel joists J and J' are shown. In this embodiment, one wing of the left flashing 10 is removed (in the manner shown in Figure 5B) so that the adjacent right flashing 10' As also shown in Figure 8, when the flashing is made of a resilient or deformable material, the legs between adjacent joists can be compressed together.

As the thickness of the wings tapers distally, the thickness of the overlap tapers accordingly. This means that, for any stacked member (eg batten, floor, etc.), there is no improper or excessively uneven stack under that member in use. For elastic flashings, this smaller stack thickness also compresses smoothly and easily in use.

The overlapping of adjacent flashings further provides a better seal against the passage of moisture and dirt between adjacent joists, which is very advantageous. In addition, it provides better support for stacked members to improve impact resistance, sound absorption, cushioning, and the like.

Referring now to Figure 9, there is shown a technical solution for abutting orthogonal joists J and J' (the so-called "butt" connection). In this solution, the joists are connected by screws or nailed plates P. A rainproof plate 10 similar in shape to the rainproof plate in FIG. 5B is installed on the joist J on the left side. One wing of the left flashing 10 is removed so that the left joist is positioned relative to the wall W in a close facing (or abutting) manner. The flashing in Figure 5A can also be used in this case.

The shape of the flashing 10' used for the right side joist J' is similar to the flashing shown in Figure 4. As shown, the wings of the left flashing overlap the right flashing to provide a barrier to moisture etc. at the junction of the two joists. Thus, the decking member D can be positioned over and fastened down to the two joists (eg, by nails or screws extendable through the respective flashings). Cover D is also able to compress the overlapping wings of the left flashing. Again, because of their tapered thickness, the wings can be compressed by the cover D so that adjacent cover members can be flushed as shown.

FIG. 10 shows a similar arrangement of orthogonal joists J and J' as in FIG. 9, however, a portion 28 (shown in phantom) of the superimposed wing 16 has been separated from the rest of the wing 16 along the cut line 22. Partially cut off, torn off or separated (for example, when wing overlapping is not required or desired). This technical solution can be used when the ingress of moisture etc. is not very important (eg in indoor applications).

Referring now to FIG. 11 , a solution is shown in which a joist J rests orthogonally against a plate member PL. Again, portions of the legs 20 adjacent to the panel PL have been removed so that the body 12 and wing sections 16 can be superimposed on the top surface of the panel PL. Thus, the deck D can be positioned on top of the joists where the joists meet the board.

Referring now to FIG. 12 , the joist J is shown snugly against the wall W and against the standoffs B . The flashing can take a shape similar to that shown in Figure 5B. One of the legs 20 is located between the joist and the wall, preventing the ingress of moisture, dirt, etc. at zone E. The overhang of the wings 16 prevents moisture, seepage, etc. from running down the sides of the joists J and from falling off the flashing at area G. In addition, the provision of the right side leg enables the joist to be coated or covered with a protective coating and prevents any stacked members (such as decking, flooring, etc.) from being accidentally coated or coated or the like. Thereby, the bottom end of the leg is provided with an edge I, so that the paint can be cut-in.

As mentioned above, FIG. 13 shows the removal (cutting, tearing, etc.) of the wings at one severance line 22 . FIG. 14 shows the removal of the legs at two cutting lines 24 .

Referring now to Figure 15, a flashing 10 similar to that shown in Figure 5E is shown positioned on a joist J. In this application, both legs 20 of the flashing have been removed so that the flashing can be placed on top of the joist, and so that the wings 16 cantilever out either side of the joist . This solution can be used if the flashing is not required to be clamped to the joists (for example, if there is no need to center the flashing well at the top of the joists). Alternatively, to maintain alignment, the flashing can be secured to the joists with adhesive, nails or screws after the stacking members are attached to the joists.

Although flashing has been described in Figures 6-12 and 15 with reference to its use on joists, it should be understood that flashing can be used in many different forms , slats, purlins, girders, columns, etc.).

Although flashings are typically made from resilient polymers, in some applications they can be made from stiffer polymers or other materials. As such, it can be extruded or molded and easily supplied through a rolling mill.

As noted above, flashings provide several important features. The features include:

Flashing screens and protects the upper surfaces of joists, beams and other structures (particularly wooden joists and beams) from rot, cracking, swelling, staining, Fading etc.

• The biasing force inherent in the flashing causes the legs to clamp against the sides of the member, allowing the flashing to be used in a variety of orientations, including reversible.

• The separability/severability of the flashing legs and wings so that it can be used in a variety of different applications, some of which have been described above with reference to Figures 5-15.

• The flashing is capable of clamping nails/screws etc. that pass through, is waterproof and prevents moisture, dust and other matter from passing between the flashing and said nails/screws.

• The flashings are capable of compressing such that adjacent flashings can be stacked without affecting the corresponding flushing of stacked components such as decking.

• Shock and impact absorbing properties of the flashing, as well as noise dampening and minimization properties (particularly when flashing is used with metal and other hard components including metal covers for formwork etc.).

• Flashings prevent moisture and dirt from entering and are located between the joists between the members, and cover or screen the members by providing overhangs on either side of them (for example, provided by the overhanging wings 16).

• Flashing can be formed into many different shapes by cutting the line (also because it can be easily cut, torn and shaped).

Although the flashing has been described with reference to a number of preferred embodiments, it should be understood that the flashing can be used in many other forms.

Claims (26)

1. A flashing comprising an elongated body adapted to be stacked on a member, and legs extending over at least part of the length of said body and protruding from either side of said body, upon stacking In front of the member, the flashing has a configuration whereby, when positioned at the member, one or all of the legs are biased towards the respective member side. 2. A flashing as claimed in claim 1 including two legs extending the entire length of the body on opposite sides of the body. 3. A flashing as claimed in claim 1 or 2, wherein the legs on opposite sides of the body protrude substantially opposite each other prior to positioning the flashing on the member. 4. A flashing as claimed in any one of the preceding claims, further comprising wings extending laterally from the body out of the legs. 5. The flashing of claim 4, wherein the wings extend the entire length of the body on opposite sides of the body. 6. A flashing as claimed in claim 4 or 5, wherein a severance line is provided along and adjacent where each wing is connected to the body, thereby enabling removal of the wing. 7. A flashing as claimed in any one of claims 4 to 6 wherein the wings have an elongate rectangular shape and are respectively joined to the body along opposite long sides of the body . 8. A flashing as claimed in any one of claims 4 to 7 wherein each wing tapers from a relatively thicker portion at its junction with the body to a relatively thinner distal end. 9. A flashing as claimed in any one of the preceding claims wherein a severance line is provided along and adjacent where each leg is attached to the body, thereby enabling removal of the legs from the body department. 10. A flashing as claimed in any one of the preceding claims wherein the body has an elongated rectangular shape. 11. A flashing as claimed in any one of the preceding claims wherein the legs have an elongated rectangular shape and are joined to the body along opposite long sides of the body. 12. A flashing as claimed in any one of the preceding claims wherein each leg tapers distally from its junction with the body or is of constant thickness. 13. A flashing as claimed in any one of the preceding claims made of an elastic material. 14. Flashing as claimed in any one of the preceding claims wherein the member is a joist, beam, pedestal, wall plate, rafter or batten. 15. A flashing as claimed in any one of the preceding claims wherein the legs are spaced apart a distance substantially equal to the width of the member. 16. A flashing as claimed in any one of the preceding claims, wherein said body has a contoured shape, said legs extending inwardly from a concave surface of said body, whereby when said The body is in a substantially flat configuration when the flashing is positioned on the member. 17. A flashing comprising an elongate body for superimposition on a member, and legs projecting from either side of said body and extending at least part of the length of said body, one of, Some or all of the legs are removable from the body along respective severance lines. 18. A flashing comprising an elongated body for superimposition on a member, and wings extending laterally from either side of said body and continuing at least part of the length of said body, one of, Some or all of the wings are removable from the body along respective severing lines. 19. A flashing as claimed in claims 17 and 18 wherein the line of severance is located along and adjacent to where each leg or wing joins the body. 20. A flashing as claimed in any one of claims 17 to 19 which may also be as claimed in any one of claims 1 to 16. 21. A flashing substantially as herein described with reference to the accompanying drawings. 22. An arrangement between first and second members wherein flashings as claimed in any one of the preceding claims are mounted in the upper working surface of each member such that the flashings of one member overlap On the flashing of another member. 23. An arrangement as claimed in claim 22 wherein selected wings and/or legs of each member flashing are removed such that the degree of flashing overlap is reduced or eliminated. 24. An arrangement as claimed in claim 22 or 23 which defines a joint between said first and second members. 25. The arrangement of claim 24 defining an abutment joint. 26. An arrangement between first and second members substantially as herein described with reference to Figures 6, 8, 9, 10, 11 and 12.

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