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EP0760043A1 - A plastically deformable flashing material, in particular for roof flashing purposes and a method of manufacturing such a material - Google Patents

A plastically deformable flashing material, in particular for roof flashing purposes and a method of manufacturing such a material

Info

Publication number
EP0760043A1
EP0760043A1 EP95916586A EP95916586A EP0760043A1 EP 0760043 A1 EP0760043 A1 EP 0760043A1 EP 95916586 A EP95916586 A EP 95916586A EP 95916586 A EP95916586 A EP 95916586A EP 0760043 A1 EP0760043 A1 EP 0760043A1
Authority
EP
European Patent Office
Prior art keywords
expanded
metal grid
flashing
roof
sheet
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.)
Granted
Application number
EP95916586A
Other languages
German (de)
French (fr)
Other versions
EP0760043B1 (en
Inventor
Villy Pedersen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Velux Industri AS
Original Assignee
VKR Holding AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VKR Holding AS filed Critical VKR Holding AS
Publication of EP0760043A1 publication Critical patent/EP0760043A1/en
Application granted granted Critical
Publication of EP0760043B1 publication Critical patent/EP0760043B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E04D13/147—Junctions of roof sheathings to chimneys or other parts extending above the roof specially adapted for inclined roofs

Definitions

  • a plastically deformable flashing material in particu ⁇ lar for roof flashing purposes and a method of manufac ⁇ turing such a material.
  • the invention relates to a plastically deformable flashing material, in particular for roof flashing purposes in connection with roof windows and similar roof penetrating building structures, consisting of a sheet-, web- or strip-shaped expanded-metal grid covered on both sides by an elastomeric layer.
  • deformable sheet materials are frequently used to provide water- and snowproof sealings between roof penetrating building structures, especially roof windows, and the surrounding roofing which may consist of tiles or other forms of corrugated covering materi- als.
  • the deformability depends solely on the extensibility of the grid insert and the elastomeric layer, respectively, which results in large demands on the properties of the elastomeric layer when using the material in connection with heavily corrugated roof coverings with great level differences in order to avoid that the expanded-metal grid breaks through one or both elastomeric layers whereby their weather-resistant effect is lost.
  • a flashing material of the above type according to the invention is characteristic in that the expanded-metal grid is pretreated to essentially the same extensibility in two directions substantially orthogonal to each other and corresponding to the longitudinal and cross direction of the sheet-, web- or strip-form, that the elastomeric layers are of ther ⁇ moplastic material, and that the sandwich material formed by the expanded-metal grid and the elastomeric layers is corrugated in a waveform parallel to one of said two directions substantially orthogonal to each other.
  • the waveform of the flashing material according to the invention entails that the area of the plastically deformable material per unit area of the finished flashing material is considerably increased. Thereby is obtained a light manual deformability merely by stret ⁇ ching the crests and valleys of the waveform with an appreciable reduction in the need for stretching or butting the expanded-metal insert of the flashing material. It has thus appeared that it was possible to obtain extremely good lasting deformation properties, prac ⁇ tically without resilience, and at the same time an improved strength, rigidity and weatherproofness.
  • the invention relates to a method of manufacturing a plastically deformable flashing material as indicated above, which method according to the invention is characteristic in that a metal sheet suitable for manufacture of expanded metal is pretreated for production of a expanded-metal grid with substan- tially the same extensibility in two directions sub ⁇ stantially orthogonal to each other, that the expanded- metal grid is covered on both sides with an elastomeric layer of thermoplastic material in a subsequent pro ⁇ cessing step when advancing in a direction parallel to one of said orthogonal directions, and in that the thus coated expanded-metal grid is corrugated in continuous waveform by a rolling process when advancing parallel to one of said orthogonal directions.
  • Fig. 1 shows a section of an embodiment of a flashing material according to the invention
  • Figs. 2 and 3 are sectional views along the lines II-II and III-III in Fig. 1.
  • the flashing material as shown in Fig. 1 may be formed in a sheet-, web- or strip-shape, eg. as an elongated strip with a width of eg. 15-30 cm for connection with the main frame bottom piece of a roof window.
  • the flashing material comprises a metal insert in the form of a expanded-metal grid 1, which may be manufactured eg. on the basis of a soft aluminium sheet or foil with a thickness of 0.5-1.0 mm.
  • the expanded-metal grid 1 is on both sides covered by an elastomeric layer 2 of a thermoplastic material which in Fig. 1 is partially removed in order to show the form of the expanded-metal grid.
  • An appro ⁇ priate material is eg. the thermoplastic rubber mainly consisting of polypropylene and EPDM rubber manufactured by Monsanto Polymer Products Company, Ohio, the USA and marketed under the registered trade mark SANTOPRENE.
  • this material has a good elastic deformability and is weatherproof in a considerable temperature range from about -40 to about 100°C.
  • the sandwich material consisting of the expanded-metal grid 1 and the elastomeric layers 2, as it is clearly seen in the sectional view in Fig. 3, is thus corrugated in a continuous waveform, eg. sine waveform.
  • the expanded-metal grid 1 may be manufactured by stretching a slit perforated aluminium sheet or foil in one direction by means of prior art technology so that the slit perforations open and form grid meshes 3 as shown in Fig. 1. This pretreatment is carried out according to the invention in such a way that the expanded-metal grid 1 . is. provided with substantially the same extensibility in two directions substantially orthogonal to each other and corresponding to the diagonals in the meshes 3.
  • the expanded-metal grid is thus manufactured with substantially square meshes 3.
  • the metal insert is cut out for the finished sheet, web- or strip-shaped flashing material according to the in- vention with the longitudinal and cross directions orthogonal to each other of the sheet-, web- or strip- form being parallel to diagonals of the meshes 3 in • Fig. -1.
  • the expanded-metal grid 1 When advancing parallel to one of these mutually orthogonal directions, the expanded-metal grid 1 is subsequently covered on both sides with the elastomeric layers 2 by a coating where the expanded-metal grid 1 is lead through the nozzle on an extruder.
  • the waveform, which is essential for the invention, of the finished flashing material is obtained in the way that the sandwich material composed of expanded-metal grid 1 and the elastomeric layers 2 is by a sub ⁇ sequent section rolling lead through one or more rolling stations in a advancing direction parallel to one of said directions orthogonal to each other, preferably corresponding to the cross direction of the strip-shaped flashing material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Building Environments (AREA)
  • Materials For Medical Uses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A plastically deformable flashing material, in particular for roof flashing purposes in connection with roof windows and similar roof penetrating building structures, consists of a sheet-, web- or strip-shaped expanded-metal grid (1) covered on both sides by an elastomeric layer (2). The expanded-metal grid (1) is pretreated to substantially uniform extensibility in directions substantially orthogonal to each other corresponding to the longitudinal and cross direction of the sheet-, web- or strip-form. The elastomeric layers (2) are of thermoplastic material, and the sandwich material shaped by the expanded-metal grid (1) and the elastomeric layers (2) is corrugated in a continuous waveform parallel to one of said directions substantially orthogonal to each other.

Description

A plastically deformable flashing material, in particu¬ lar for roof flashing purposes and a method of manufac¬ turing such a material.
The invention relates to a plastically deformable flashing material, in particular for roof flashing purposes in connection with roof windows and similar roof penetrating building structures, consisting of a sheet-, web- or strip-shaped expanded-metal grid covered on both sides by an elastomeric layer. Such deformable sheet materials are frequently used to provide water- and snowproof sealings between roof penetrating building structures, especially roof windows, and the surrounding roofing which may consist of tiles or other forms of corrugated covering materi- als.
In order to permit an adaptation of such flashing materials to the form of the surrounding roof covering by a purely manual deformation, the use of corrugated roofing materials made from lead or other forms of deformable metal foils as disclosed in, inter alia, DE utility model G 82 00 019.0, has in course of time also been proposed to replace the flat lead skirts with a thickness of 1-2 mm and originally used for this purpose. Concurrently with increasing concern of the environment, it has further been suggested to use a number of different sandwich or composite materials including those disclosed in the applicant's DK patent no. 148.064, EP patent no. 0 123 141 and DK patent no. 165.014, in order to avoid the pollution problems related to the use of lead.
However, such sandwich materials have as a rule been considerably more expensive than pure lead flash¬ ings. Furthermore, both per se and as a consequence of their incorporation in a sandwich material together with partly elastomeric materials, the used metal foils have not always had the required lasting deformation pro¬ perties because of a certain remaining elastic resili- ence.
By the flashing material known from DK patent no. 165014, an attempt to avoid- this problem has been made by using a plastically formable metal insert in the form of an expanded-metal grid, which has an extensibility of 80 to 150% in the longitudinal direction of the sheet-, web- or strip-shaped material whereas the extensibility in the cross direction orthogonal thereto is less or equal to 20%, which insert is surrounded by an elastomeric layer in the form of a non-adhesive polyisobutylene mass with an extensibility of more than 50%.
As this material is shaped in plane sheet-form, the deformability depends solely on the extensibility of the grid insert and the elastomeric layer, respectively, which results in large demands on the properties of the elastomeric layer when using the material in connection with heavily corrugated roof coverings with great level differences in order to avoid that the expanded-metal grid breaks through one or both elastomeric layers whereby their weather-resistant effect is lost.
Based on flashing materials of the type disclosed in above DK patent no. 165014, it is the object of the invention to procure a new design of such a flashing material which can be produced at a relatively low price and has deformation properties fully up to the standard of those of the best sandwich materials at the same time as the weather-resistant effect is maintained to the ■ full" extent.
To this end, a flashing material of the above type according to the invention is characteristic in that the expanded-metal grid is pretreated to essentially the same extensibility in two directions substantially orthogonal to each other and corresponding to the longitudinal and cross direction of the sheet-, web- or strip-form, that the elastomeric layers are of ther¬ moplastic material, and that the sandwich material formed by the expanded-metal grid and the elastomeric layers is corrugated in a waveform parallel to one of said two directions substantially orthogonal to each other.
The waveform of the flashing material according to the invention entails that the area of the plastically deformable material per unit area of the finished flashing material is considerably increased. Thereby is obtained a light manual deformability merely by stret¬ ching the crests and valleys of the waveform with an appreciable reduction in the need for stretching or butting the expanded-metal insert of the flashing material. It has thus appeared that it was possible to obtain extremely good lasting deformation properties, prac¬ tically without resilience, and at the same time an improved strength, rigidity and weatherproofness.
Furthermore, the invention relates to a method of manufacturing a plastically deformable flashing material as indicated above, which method according to the invention is characteristic in that a metal sheet suitable for manufacture of expanded metal is pretreated for production of a expanded-metal grid with substan- tially the same extensibility in two directions sub¬ stantially orthogonal to each other, that the expanded- metal grid is covered on both sides with an elastomeric layer of thermoplastic material in a subsequent pro¬ cessing step when advancing in a direction parallel to one of said orthogonal directions, and in that the thus coated expanded-metal grid is corrugated in continuous waveform by a rolling process when advancing parallel to one of said orthogonal directions.
In the following the invention will be explained in more detail with reference to the schematic drawing where
Fig. 1 shows a section of an embodiment of a flashing material according to the invention, and
Figs. 2 and 3 are sectional views along the lines II-II and III-III in Fig. 1.
The flashing material as shown in Fig. 1 may be formed in a sheet-, web- or strip-shape, eg. as an elongated strip with a width of eg. 15-30 cm for connection with the main frame bottom piece of a roof window. The flashing material comprises a metal insert in the form of a expanded-metal grid 1, which may be manufactured eg. on the basis of a soft aluminium sheet or foil with a thickness of 0.5-1.0 mm.
The expanded-metal grid 1 is on both sides covered by an elastomeric layer 2 of a thermoplastic material which in Fig. 1 is partially removed in order to show the form of the expanded-metal grid. An appro¬ priate material is eg. the thermoplastic rubber mainly consisting of polypropylene and EPDM rubber manufactured by Monsanto Polymer Products Company, Ohio, the USA and marketed under the registered trade mark SANTOPRENE.
Especially in designs in the range of 40 to 80 Shore A hardness, this material has a good elastic deformability and is weatherproof in a considerable temperature range from about -40 to about 100°C.
As an important feature of the invention, the sandwich material consisting of the expanded-metal grid 1 and the elastomeric layers 2, as it is clearly seen in the sectional view in Fig. 3, is thus corrugated in a continuous waveform, eg. sine waveform. The expanded-metal grid 1 may be manufactured by stretching a slit perforated aluminium sheet or foil in one direction by means of prior art technology so that the slit perforations open and form grid meshes 3 as shown in Fig. 1. This pretreatment is carried out according to the invention in such a way that the expanded-metal grid 1 . is. provided with substantially the same extensibility in two directions substantially orthogonal to each other and corresponding to the diagonals in the meshes 3. The expanded-metal grid is thus manufactured with substantially square meshes 3.
As known per se from afore-said DK patent no.
165.014, a high degree of plastic deformability with a very low resilient recovery capacity, typically less than 5%, is obtained.
In order to remove the cold setting typically occuring during this pretreatment, there may be per¬ formed an annealing of the thus manufactured expanded- metal grid. As there is further a pronounced tendency for the material in the aluminium sheet or foil to raise when stretched, it is expedient to remove the thus created sharp edges by a slight smooth-rolling before the further pretreatment in order to avoid that the elasto- meric layers 2 in the finished flashing are damaged by such edges.
From a thus manufactured expanded-metal grid the metal insert is cut out for the finished sheet, web- or strip-shaped flashing material according to the in- vention with the longitudinal and cross directions orthogonal to each other of the sheet-, web- or strip- form being parallel to diagonals of the meshes 3 in • Fig. -1.
When advancing parallel to one of these mutually orthogonal directions, the expanded-metal grid 1 is subsequently covered on both sides with the elastomeric layers 2 by a coating where the expanded-metal grid 1 is lead through the nozzle on an extruder.
The waveform, which is essential for the invention, of the finished flashing material is obtained in the way that the sandwich material composed of expanded-metal grid 1 and the elastomeric layers 2 is by a sub¬ sequent section rolling lead through one or more rolling stations in a advancing direction parallel to one of said directions orthogonal to each other, preferably corresponding to the cross direction of the strip-shaped flashing material.
By the above choice of material for the elastomeric layers 2, it has appeared to be possible to carry through this section rolling without elongation or butting of the elastomeric layers.

Claims

C L A I M S
1. A plastically deformable flashing material, in particular for roof flashing purposes in connection with roof windows and similar roof penetrating building structures, consisting of a sheet-, web- or strip-shaped expanded-metal grid (1) covered on both sides by an elastomeric layer (2) , .characterized in that the expanded-metal grid (1) is pretreated to essentially the same extensibility in two directions substantially orthogonal to each other and corresponding to the longitudinal and cross direction of the sheet-, web- or strip-form, that the elastomeric layers (2) are of ther¬ moplastic material, and that the sandwich material formed by the expanded-metal grid (1) and the elasto- meric layers (2) is corrugated in a waveform parallel to one of said two directions substantially orthogonal to each other.
2. A method of manufacturing a flashing material according to claim 1, characterized in that a metal sheet suitable for manufacture of expanded metal is pretreated for production of an expanded-metal grid (1) with substantially the same extensibility in two directions substantially orthogonal to each other, that the expanded-metal grid is covered on both sides with an elastomeric layer (2) of thermoplastic material in a subsequent processing step when advancing in a direction parallel to one of said orthogonal directions, and in that the thus covered expanded-metal grid (1) is corrugated in a continuous waveform by a rolling process when advancing parallel to one of said orthogonal direc¬ tions.
3. A method according to claim 2, characterized in • that- prior to said subsequent process step, the ex¬ panded-metal grid (1) is annealed for removal of a possible cold setting. 8
4. A method according to claim 2 or 3, characterized in that prior to said subsequent process step, the ex¬ panded-metal grid (1) is smooth-rolled for removal of sharp edges originating from said pretreatment.
EP95916586A 1994-05-18 1995-03-29 A plastically deformable flashing material, in particular for roof flashing purposes and a method of manufacturing such a material Expired - Lifetime EP0760043B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK563/94 1994-05-18
DK56394 1994-05-18
DK056394A DK56394A (en) 1994-05-18 1994-05-18 Plastic deformable covering material, in particular for roofing purposes, and method of making such material
PCT/DK1995/000141 WO1995031620A1 (en) 1994-05-18 1995-03-29 A plastically deformable flashing material, in particular for roof flashing purposes and a method of manufacturing such a material

Publications (2)

Publication Number Publication Date
EP0760043A1 true EP0760043A1 (en) 1997-03-05
EP0760043B1 EP0760043B1 (en) 2000-01-19

Family

ID=8094958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95916586A Expired - Lifetime EP0760043B1 (en) 1994-05-18 1995-03-29 A plastically deformable flashing material, in particular for roof flashing purposes and a method of manufacturing such a material

Country Status (11)

Country Link
EP (1) EP0760043B1 (en)
JP (1) JP3434516B2 (en)
CN (1) CN1139706C (en)
AT (1) ATE189026T1 (en)
AU (1) AU2303595A (en)
CZ (1) CZ291084B6 (en)
DE (1) DE69514652T2 (en)
DK (1) DK56394A (en)
HU (1) HU215354B (en)
PL (1) PL186848B1 (en)
WO (1) WO1995031620A1 (en)

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DE19523834C2 (en) * 1995-06-30 1997-09-11 Braas Gmbh Plastic material that can be deformed by hand and process for its production
NL1009983C2 (en) * 1998-09-01 2000-03-02 Besouw Kunststoffen B V Van Sealing material used as a lead substitute in the construction industry, comprises a metal film and at least one thermoplastic polymer layer
CN1177121C (en) 2000-02-29 2004-11-24 Vkr控股有限公司 Laminate roof flashing material
US7971403B2 (en) 2000-09-13 2011-07-05 Poul-Ernst Meier Plate-shaped cover material
NZ507270A (en) * 2000-09-29 2003-04-29 Andrew Leo Haynes Flexible tile trim flashings
GB0220896D0 (en) * 2002-09-09 2002-10-16 Cavity Trays Ltd Ventilation of roofs
FR2933998B1 (en) * 2008-07-15 2016-07-22 Daniel Cauquil DEFORMABLE SEALING MATERIAL
DE202008013677U1 (en) 2008-10-15 2009-02-19 Röttger, Wilhelm, Dipl.-Ing. Plastically deformable material web
DE102008051728B4 (en) 2008-10-15 2011-02-17 Röttger, Wilhelm, Dipl.-Ing. Plastically deformable material web
NL2002660C2 (en) 2009-03-24 2010-09-27 Veenvoort B V De Covering material for water- or weather-proofing.
WO2011094326A1 (en) 2010-01-28 2011-08-04 Geocel Holdings Corporation Device, kit and method for sealing roof penetrations
EP2697448A1 (en) 2011-04-11 2014-02-19 Umicore Building Products France Multilayer finishing strip
NL2006780C2 (en) * 2011-05-13 2012-11-14 Ubbink Bv COVER MATERIAL FOR ARCHITECTURAL CONSTRUCTIONS.
EP2937488B1 (en) 2012-12-27 2020-02-19 VKR Holding A/S A skirt member for use in a flashing for a roof penetrating structure and use of a skirt member in flashing a roof window mounted in an inclined roof
DK3240684T3 (en) 2014-12-29 2021-06-28 Redeahold Apeldoorn B V BUILDING MATERIAL
CN105835477B (en) * 2016-02-04 2017-10-24 岳阳东方雨虹防水技术有限责任公司 HDPE macromolecules water-proof sheet material and its former and moulding process
CN106393875B (en) * 2016-02-04 2018-06-01 岳阳东方雨虹防水技术有限责任公司 A kind of new waterproof plate and its manufacture craft
CN108868013A (en) * 2018-06-29 2018-11-23 吕海波 A kind of novel offset plate of permanent usability of roof waterproof
US11592197B2 (en) 2018-09-28 2023-02-28 Solatube International, Inc. Bottom-mounted whole house fan assembly
NL2022206B1 (en) * 2018-12-13 2020-07-03 Redeahold Apeldoorn B V Synthetic flashing material
US12139304B2 (en) * 2019-07-23 2024-11-12 Sartorius Stedim North America Inc. Composite articles of lattice reinforced elastomers
DK180892B1 (en) 2020-07-09 2022-06-14 Vkr Holding As A skirt member for use in a flashing for a roof penetrating structure and a method for making a skirt member
DK181692B1 (en) * 2020-09-03 2024-09-25 Vkr Holding As Method of mounting a flashing assembly, a flashing assembly and a roof structure

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GB1400385A (en) * 1971-05-30 1975-07-16 Grace W R & Co Preformed sheet-like structures
DK148064C (en) * 1980-04-15 1985-07-29 Rasmussen Holding As V Kann DEFORMABLE SHEET MATERIALS, NECESSARY FOR USE IN ROOF SEALING
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Also Published As

Publication number Publication date
PL186848B1 (en) 2004-03-31
HU215354B (en) 1998-12-28
JP3434516B2 (en) 2003-08-11
DE69514652D1 (en) 2000-02-24
WO1995031620A1 (en) 1995-11-23
CN1148424A (en) 1997-04-23
DE69514652T2 (en) 2000-08-31
CZ291084B6 (en) 2002-12-11
JPH10500463A (en) 1998-01-13
EP0760043B1 (en) 2000-01-19
HUT75588A (en) 1997-05-28
HU9602777D0 (en) 1996-12-30
DK56394A (en) 1995-11-19
ATE189026T1 (en) 2000-02-15
CZ336596A3 (en) 1997-05-14
PL317055A1 (en) 1997-03-03
CN1139706C (en) 2004-02-25
AU2303595A (en) 1995-12-05

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