KR20100049537A - Plane flashing material with drainage properties - Google Patents

Abstract

A flashing material (100) provides a moisture drainage passage to prevent water damage to buildings. The flashing material (100) includes a planar portion for providing a drainage plane for the passage of moisture along a plane defined by said planar portion. Said planar portion includes a porous sheet (110) capable of permitting the passage of water therethrough along the drain plain. A water-impervious layer (120) is bonded on a first side to the planar portion; and a layer of adhesive (150) is applied to a second side of the water-impervious layer (120). The flashing material (100) is particularly useful for installing a portal such as a window or door in an opening in a wall, or for sealing joints in roofs, for installing skylights and similar such uses.

Description

Plane cladding material having drainage {PLANE FLASHING MATERIAL WITH DRAINAGE PROPERTIES}

The present application relates to a method and a material for providing a building construction, and in particular a flashing system comprising a drainage plane for the removal of moisture.

Prevention of water damage is a problem in the building construction industry. In particular, external moisture, such as rain, can cause decay and mold growth of wood when it comes into prolonged contact with the interior structure of a building. Wood rot causes structural damage and very expensive repair costs. Molds can harm the health of residents in buildings by causing allergies and other diseases.

Moisture intrusion can occur over time by a combination of various mechanisms. For example, buildings may sink after several years. The shapes of the buildings are warped and no longer square or flat. Window joints and sealants may be separated, and then there may be many gaps in the flashing. Rainstorm that strikes at off-normal angles can seep through the sides of the barrier. In addition, moisture can be generated by the occupants inside the home, for example by cooking, washing, bathing, and other such activities. After this moisture is generated, it can migrate through the wall to the outside, where it can condense. If not removed, these condensates can cause other causes of flooding.

Today, the residential and commercial building market as a whole is driven by soaring costs of litigation and claims management due to the effects of mold and flooding on building envelope parts using current state-of-the-art technology for clam systems. I'm under threat. Organizations like AAMA are attempting to develop minimum standards for self adhering flashing and focus on the design of the current generation, ignoring the need for drainage suitable for building / opening interfaces.

To prevent flooding, the building industry uses moisture barriers that are impervious to water. Such moisture barriers include polymer sheets (eg, TYVEK ™ brand polyolefin sheets), asphalt saturated felt or paper, and the like. A barrier is attached around the windows to prevent water from leaking through the joint between the window frame and the wall on which it is installed. The clam may include sheets of metal, polymer films, bitumen, coatings of silicon and other sealants, face films and other materials well known in the building art. The problem with conventional clappers and methods is that drainage or outflow is not easy once water enters behind the trim and cladding. The absence of drainage in the clappers has the disadvantage of trapping moisture between the exterior trim, cladding and siding.

Current barrier systems use large amounts of heavy, flexible materials to block water and to fit on uneven surfaces. This typical chemical structure limits the temperature efficiency and the range of installation. Current barrier systems generally experience compatibility problems with sealants used around the gaps of windows and doors to seal gaps and seal windows in place. These products, where all impermeable materials and solid face films are used, do not create a drainage surface for moving water below the edges of the window, and do not introduce air to promote evaporation.

What is needed, and what the present invention provides, is a drain surface in the immediate vicinity of a window, door, or joint in the most vulnerable part of the building envelope for removal of moisture.

Summary of the Invention

The present invention provides a method and a barrier that provides a moisture drainage passage to mitigate conditions that prevent water damage to buildings and promote the growth of mold and mildew.

Such a clapper is: (a) to provide a drainage plane for passing moisture along one plane defined by it, and (i) capable of passing water along the drainage plane. One planar portion, comprising one porous sheet, and / or (ii) one water resistant sheet having one surface for providing the drainage surface. ; (b) one water-impervious layer whose first side is bonded to the planar portion; And (c) one adhesive layer applied to the second side of the impermeable layer.

Such cladding may be used to install a door, such as a window or door, in the opening of a wall, for installation of skylights, weather stripping, deck installations, and similar applications. It is particularly useful for sealing the joints of the roofs.

Various embodiments of the invention will be described below with reference to the drawings, among which:
1 is a perspective view of a water barrier material of the present invention;
1A and 1B are other embodiments of the cladding material;
2 is a front view illustrating the use of a clapper for sealing around a window; And
Figure 3 is a side view illustrating another use of the flashing tape of the present invention in connection with a window sill.

Detailed Description of the Preferred Embodiment (s)

Referring now to FIG. 1, in one embodiment the water barrier material, ie, the water barrier tape 100, is a porous polymer sheet capable of passing water along the plane of the sheet to provide a drainage surface for the water. The first layer 110 of the. The porous polymer sheet 110 is preferably an open cell foam. Preferred open cell foams suitable for use in the present invention can be purchased from "Foamex International Inc.", Linwood, PA under the names "2AZUF" and "P4B". Alternatively, the porous polymer sheet 110 may be configured to include a woven or nonwoven layer.

The second layer 120 of polymer sheet is adhered to the first layer 110 by, for example, fusion bonding or adhesive bonding or any other suitable bonding method. The second layer 120 is impermeable to water and is preferably a closed cell polymeric foam. Closed cell polymeric foams suitable for the present invention may be purchased from "Sekisui Voltek LLC" under the name "Volara 3TS, 5TS, GEO or GG". Alternatively, the second layer 120 may be a water-impermeable sheet, such as a polymer film or a metal foil.

The water barrier tape 100 of the present invention preferably further includes an adhesive layer 130 attached to the second side surface of the second layer 120. The adhesive is preferably a high performance pressure sensitive acrylic adhesive to promote adhesion to a substrate, such as a wall, a sheet of water film, or a house wrapping material. Pressure-sensitive adhesives suitable for use in the present invention may be purchased as "one-sided or two-sided coated VOLTEK Volara 5TS foams" from "Adchem Co." under the name "MTLG-190".

The water film tape 100 preferably includes a release film 140 that is removed before the tape 100 is attached to the substrate.

Optionally, the clapper tape 100 is further pressure sensitive to an upper surface of the first layer of open cell foam material to enable adhesion of a layer of water resistant cladding or tight film material on top of the clapper tape 100. Along with the adhesive layer 150, it may further include one combined removable release liner 151 overlying the adhesive layer 150. Dam body or close film (house wrapping) material, a sheet of polyolefin film, preferably a spun-bonded (spun-bonded) polyethylene or spun-bonded polypropylene (e.g., TYVEK ^® brand), metal or foil ( foil sheet or other conventional material. Preferred tight membrane materials for use in connection with the water barrier tape of the present invention have at least one engineered surface of a material formed with embossed nondirectional channels to allow for aeration and drainage. Polyolefin sheet house wrap, commercially available from "Valeron Films" under the name "VORTEC ™".

Referring now to FIGS. 1A and 1B, embodiment 100A of a water barrier tape includes a porous polymer sheet 110 adhered to an impermeable second layer 120 having one adhesive layer 130. . The water resistant tight membrane 160 is adhered to the porous sheet 110. The tight membrane has at least one textured surface 161 with embossed omnidirectional channels that provides a drain surface along the surface 161 to allow drainage of moisture. Thus, drainage is achieved by both the porous polymer sheet 110 and the textured surface 161 of the tight membrane. Embodiment 100A of the clapper tape has a release liner 140 attached to the adhesive layer 130 and a second release liner 151 on the opposite side of the clapper tape 100A as shown in FIG. 1. One additional adhesive layer 150 can also be included.

FIG. 1B shows an embodiment 100B of a water repellent tape, in which the dense film 160 is adhered directly to the impermeable second layer 120 such that the drainage surface is provided by the textured surface 161 of the dense film. do. Embodiment 100B of the clapper tape has a release liner 140 attached to the adhesive layer 130 and a second release liner 151 on the opposite side of the clapper tape 100A, as shown in FIG. 1. One additional adhesive layer 150 can also be included.

The clapper tape 100 of the present invention is generally about 4 to 9 inches wide and stored in rolls. Preferred thickness is in the range of about 0.030 inches to about 0.080 inches. It should be flexible but not compressible enough to collapse the open cell foam under normal pressures, which would interfere with the function of the drainage surface provided by the tape 100. Any dimensions suitable for the use described herein can be used.

Optionally, the first or second polymer layers 110 and / or 120 may be treated with insecticides, antibacterials and / or with agents for inhibiting the growth of, for example, fungi or powdery mildew. Like other biocides, one or more pesticides may be mixed therein. Such pesticides may be mixed into the polymer itself or may be introduced into the open cell foam after manufacture. Compatible organic and inorganic insecticides are known to prevent damage by powdery mildew, fungus, mold, termites and other tree-eating insects.

Referring now to FIG. 2, the use of the clapper tape 100 is shown, with windows 200 installed in appropriately sized openings in the wall 300 of the building. In a typical window installation process, the tight membrane is folded towards the sides and bottom of the opening in the wall where the window is to be installed. The window is then inserted. Appropriate sealants (eg, silicones or other suitable compounds) may be used to fill the gap between the window and the wall to secure the window. Generally, the window will have a flange that extends one or two inches more than the edge of the opening. The flange can be fastened to the structure with fasteners (such as nails, screws, etc.). In one exemplary process, the clapper tape 100 is attached over the flange and the wall to overlap the edge of the flange. Optionally, prior to installing a window to provide a drainage surface under the flange, the clapper tape 100 may be attached around the outer circumferential surface of the opening in accordance with approved installation procedures available from AAMA, AIA, WDMA and ASTM. have. Optionally, the clapper tape 100 is attached both below and above the window flange. Other barrier materials, tight films, trim boards, or the like may be attached over the barrier tape 100.

In another embodiment shown in FIG. 3, a sloped piece 210, preferably made of wood or plastic composite, is installed on the sill between the wall 300 and the window 200. . For example, a low permeable film 170 of polyethylene of EPDM membrane is adhesively bonded to the top of the inclined member 210 and wrapped around the corner of the sill. And overlap the water resistant tight membrane 165 installed on the outer surface of the wall 300. Porous polymer sheet 115 made from a fiber sheet or open cell foam as described above with respect to layer 110 is installed on film 170 to provide a drainage surface. For example, an open cell foam would provide a barrier that intrudes air while allowing water to flow out of the building structure. The tight membrane 165 preferably has at least one textured surface with relief channels to provide a drainage surface, as described above for the "VORTEC ™ brand tight membrane".

The description includes many details, but these details should not be construed as limiting the invention, but merely as examples of their preferred embodiments. For example, the clapper tape 100 of the present invention can be used in any application where it is advantageous to provide drainage surfaces for moisture, such as in automobile, commercial or residential construction. Those of ordinary skill in the art will envision many other embodiments within the scope and spirit of the invention as defined by the claims appended hereto.

100, 100A, 100B: water film tape 110: the first polymer layer
115: porous polymer sheet 120: second polymer layer
130, 150: adhesive layer 140, 151: release film (liner)
160, 165: tight membrane 161: grained surface
170: film 200: window
210: inclined member 300: wall

Claims (24)

(a) to provide a drainage plane for passing moisture along one plane partitioned by it,
i. One porous sheet, and / or capable of passing water along the drain surface
ii. A planar portion, comprising a water resistant sheet, having one surface that defines the drain surface;
(b) one water-impervious layer whose first side is bonded to the planar portion; And,
and (c) one adhesive layer applied to the second side of the water impermeable layer. The water barrier material of claim 1 wherein the porous first sheet comprises an open cell polymeric foam material. The water barrier material of claim 2, wherein the second sheet comprises a closed cell polymeric foam. The water barrier material according to claim 1, wherein the adhesive is a pressure sensitive adhesive. The clapper of claim 4, further comprising a removable release liner overlying the adhesive layer. The clapper of claim 1, further comprising a second adhesive layer attached to a surface of the first sheet facing the side to which the second layer of the polymeric sheet is bonded. 7. The clapper of claim 6, further comprising a release liner removably overlying said second adhesive layer. 4. The water barrier material according to claim 3, wherein the second sheet of closed cell polymer foam material is adhered to the first sheet of open cell polymer foam material by flame bonding. 4. The water barrier material of claim 3 wherein the second sheet of closed cell polymer foam is adhered to the first sheet of open cell polymer foam by adhesive bonding. The water barrier material of claim 1, wherein at least the porous first sheet further comprises at least one biocide. The clamper according to claim 1, wherein the surface of the water resistant sheet is made of a material in which embossed nondirectional channels are formed such that moisture is drained along the surface. The water barrier material according to claim 11, wherein the planar portion (a) comprises both a porous sheet and a water resistant sheet. The water barrier material according to claim 11, wherein the planar portion (a) comprises only a water resistant sheet bonded directly to the impermeable layer (b). (a) a first layer of open cell polymer foam;
(b) a second layer of closed cell polymer foam, the first side of which is bonded to the first layer of open cell polymer foam;
(c) one pressure sensitive adhesive layer pasted to the second side of the second layer;
and (d) one removable release liner overlying the pressure sensitive adhesive layer. The clapper of claim 11, further comprising a water-resistant sheet adhered to one side of the open cell polymer foam and having one surface with relief omni-directional channels. (a) to provide a drainage plane for passing moisture along one plane partitioned by it,
One porous sheet, and / or capable of passing water along the drain surface
One flat portion comprising one water resistant sheet having one surface defining the drain surface; And
(b) a water impermeable layer, the first side of which is adhered to the planar portion;
A method of sealing a joint of a building wall, the method comprising attaching to a surface of a wall near or above a joint of a building wall. 17. The method of claim 16, wherein the porous sheet comprises an open cell polymer foam. The method of claim 16, wherein the impermeable layer comprises a closed cell polymer foam. 17. The method of claim 16, wherein the attaching step comprises adheringly bonding the water film tape with a pressure sensitive adhesive. 17. The method of claim 16, wherein the surface of the water resistant sheet is made of a material having embossed omnidirectional channels such that moisture is drained along the surface. 17. The method of claim 16 wherein the planar portion (a) comprises both a porous sheet and a water resistant sheet. 17. The method of claim 16, wherein the planar portion (a) comprises only a water resistant sheet bonded directly to the impermeable layer (b). 18. The system of claim 16, wherein the engagement portion is between one door and one edge of a wall that defines one opening configured and configured to receive the door. , Method of sealing of joints in building walls. 24. The method of claim 23, wherein the door is a window.

Images