EP0407118B1 - Umgekehrte Dachbauweise - Google Patents

Umgekehrte Dachbauweise Download PDF

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Publication number
EP0407118B1
EP0407118B1 EP90307196A EP90307196A EP0407118B1 EP 0407118 B1 EP0407118 B1 EP 0407118B1 EP 90307196 A EP90307196 A EP 90307196A EP 90307196 A EP90307196 A EP 90307196A EP 0407118 B1 EP0407118 B1 EP 0407118B1
Authority
EP
European Patent Office
Prior art keywords
boards
insulation
insulation boards
permeable membrane
inverted roof
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.)
Expired - Lifetime
Application number
EP90307196A
Other languages
English (en)
French (fr)
Other versions
EP0407118A1 (de
Inventor
John David William Brockington
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.)
AOC Technology AG
Original Assignee
Lin Pac Plastics International Ltd
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Filing date
Publication date
Application filed by Lin Pac Plastics International Ltd filed Critical Lin Pac Plastics International Ltd
Priority to AT90307196T priority Critical patent/ATE87697T1/de
Publication of EP0407118A1 publication Critical patent/EP0407118A1/de
Application granted granted Critical
Publication of EP0407118B1 publication Critical patent/EP0407118B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
    • E04D13/1606—Insulation of the roof covering characterised by its integration in the roof structure
    • E04D13/1662—Inverted roofs or exteriorly insulated roofs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D11/00—Roof covering, as far as not restricted to features covered by only one of groups E04D1/00 - E04D9/00; Roof covering in ways not provided for by groups E04D1/00 - E04D9/00, e.g. built-up roofs, elevated load-supporting roof coverings
    • E04D11/02—Build-up roofs, i.e. consisting of two or more layers bonded together in situ, at least one of the layers being of watertight composition

Definitions

  • Insulation can be incorporated into a flat roof construction either over or under the waterproof membrane of the roof. Where the insulation system is placed on top of the waterproof membrane this is usually referred to as an inverted roof system.
  • an inverted roof system protects the waterproof membrane from thermal shock, the effects of sunlight and weathering, and damage by roof traffic.
  • Another advantage of the inverted roof system is that the insulation of an existing flat roof can be upgraded without replacement of the existing waterproof membrane.
  • the insulation is provided by foamed slabs which are placed on top of the waterproof membrane and to prevent the slabs being blown, or floating off, the existing waterproof membrane it is necessary somehow to anchor them in place.
  • the insulation slabs are laid loosely on top of a waterproof membrane on a flat roof and ballasted with gravel or paving slabs having a weight of at least 80 kilograms per square meter.
  • the insulation material has the form of rectangular slabs coated on one side with a cementitious screed.
  • "ROOFMATE” a trade mark of The Dow Chemical Company
  • the slabs have a tongue and groove formed on opposite long sides of the slabs and the insulation slabs are laid in a brick bond pattern with the tongues and grooves of adjacent slabs engaged with one another.
  • the Purlcrete Chevron system by Coolag, all the edges of the slabs are rebated and the slabs are laid in a chevron pattern with adjacent edges overlapped.
  • Such systems typically have a total weight of between 20 and 25 kilograms per square meter.
  • roofs are of lightweight construction and cannot carry the loads imposed by the inverted roof systems currently on the market.
  • roofs are insulated by warm roof systems mainly using a foamed polyurethane as the insulating material.
  • insulating material requires the use of chlorofluorocarbons during its manufacture and since these are environmentally damaging it is desirable to provide an alternative system.
  • DE-A-3,215,172 discloses a roof construction system in which individual polystyrene tiles have a continuous membrane covering to connect the tiles and hold them in place.
  • insulating tiles are disclosed which include tongues and grooves to join the tiles together.
  • an inverted roof comprises a weatherproof membrane covered by rectangular, foamed polystyrene insulation boards arranged in a herringbone pattern, each of the insulation boards having a ratio of long to short side of 2:1 with tongues formed on an adjacent long and short side and corresponding grooves formed on the other two sides, and a permeable membrane having a weight of between 3 and 15 kilograms per square meter covering the insulation boards.
  • the foamed polystyrene insulation boards are formed by extrusion into a vacuum with their edges subsequently being profiled.
  • the tongues and grooves include a slight taper to facilitate their insertion and the arrangement of the insulation boards in a herringbone pattern.
  • the density of the foamed polystyrene insulation boards may be 25 kilograms per cubic metre and they may have a compressive strength of the order of 220 Kpa. However it is preferred that they have a density of 35 kilograms per cubic meter and a compressive strength of the order of 350 Kpa.
  • the insulation board may come in a range of sizes depending upon the degree of insulation required and typically the boards come in thicknesses of 60, 75 and 100 mm. For boards of this thickness it is preferred that the length and width of the board are 1200 mm by 600 mm.
  • the permeable membrane has a weight of between 4 and 7 kilograms per square meter.
  • the permeable membrane typically has the form of an elongate strip having a width generally similar to that of the length of each insulation board.
  • the strips of permeable membrane are preferably laid at 45° to the edges of the boards arranged in their herringbone pattern and each strip extends over a number of the boards.
  • One suitable material for the permeable membrane is made from a rebonded rubber crumb material. This is particularly cheap since it is formed from waste materials yet its properties are ideally suited to the present invention.
  • This material is sold under the trade name of RYPOL to be used as an outdoor recreation surface, in running tracks, playing fields, and children's playgrounds.
  • the permeable membrane also acts as a filter to prevent leaves and other debris from passing through and blocking the drainage channels and outlets of the roof. since the membrane is permeable it is also free-draining and so does not hold water to encourage the germination and rooting of seeds as can happen with conventional systems including ballast or a cementitious screed.
  • the permeable membrane may be bonded to the upper surface of the insulation boards. It may be bonded at spaced locations but preferably the edges of the permeable membrane are bonded to the boards that it covers.
  • the membrane may be bonded using a modified bitumen adhesive or a moisture cured polyurethane.
  • Preferably at the edges of the roof the permeable membrane is carried over the periphery of the insulation boards and secured to the underlying structure. Again to reinforce the edge it is possible for the insulation boards to be adhered to the underlying waterproof membrane but care must be taken to ensure that adequate gaps are left between spaced portions of adhesive to allow for water drainage between the insulation boards and the waterproof membrane.
  • Figure 1 shows a rectangular insulation board 30 having a ratio of long to short side of 2:1 with tongues formed on an adjacent long and short side and corresponding grooves formed on the other two sides of the board 30.
  • Figure 2 is an exploded cross-section through the joint formed between an adjacent pair of insulation boards and shows the tongue 31 and groove 32.
  • the tongues 31 and grooves 32 have an extent of 24 and 25 mm respectively and include a 2 degree taper to facilitate insertion of the tongues 31 into the grooves 32.
  • the boards 30 typically have dimensions of 1200 mm x 600 mm.
  • a start is made in one corner by placing a half board 1 in the corner and then fitting a second board 2 beside it.
  • a third board 3 is then used to lock together the boards 1 and 2 and a fourth board 4 interfitted with the third board 3.
  • Fifth, sixth, seventh and eighth boards are then joined on as shown in Figure 1 so that, for example, considering board 6, board 6 forms a tongued and grooved connection with half the side of board 5 and board 2, the end of board 3 and half the side of board 7.
  • Additional boards are laid in the order shown in Figure 1 so that when the laying of the insulation boards has been completed block 6, for example, is interlocked with blocks 2, 3, 5, 7, 12 and 13.
  • a roll of permeable membrane typically having a width of one meter and a length of 6 or 10 metres is cut in half at a 45° angle.
  • a resulting strip of permeable membrane 35 is then unrolled on top of the insulation boards 30 to extend generally at 45° to the edges of the insulation boards 30.
  • the other half of the roll is laid beside it and butt jointed against it as shown by the reference numeral 36. Further strips of permeable membrane are butt jointed to the sides and extend over the remainder of the surface.
  • the permeable membrane 35 is formed by a rebonded rubber crumb material having a thickness of 6 or 9 mm and sold under the trade name RYPOL.
  • the permeable membrane 35 is strip bonded to the insulation boards 30 by applying a continuous strip of adhesive of width 25mm to each edge.
  • the adhesive may be a modified bitumen type of adhesive, one such example being known under the trade name of TIXIFELT, or a moisture cured polyurethane.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Laminated Bodies (AREA)
  • Soil Working Implements (AREA)
  • Ship Loading And Unloading (AREA)
  • Greenhouses (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Tents Or Canopies (AREA)

Claims (9)

  1. Umgekehrtes Dach, umfassend eine wasserdichte Membran, die durch rechteckige, geschäumte Polystyrolisolierungsbretter (3) abgedeckt ist, dadurch gekennzeichnet, daß die Isolierungsbretter (30) in einem Heringsgrätenmuster angeordnet sind, und daß jedes Isolierungsbrett ein Verhältnis von langer zur kurzen Seite von 2 : 1 besitzt, wobei Zungen (31) an einer angrenzenden langen und kurzen Seite und entsprechende Nuten (32) an den beiden anderen Seiten ausgebildet sind, und daß eine permeable Membran (35,36) mit einem Gewicht zwischen 3 und 15 kg/m² die Isolierungsbretter abdeckt.
  2. Umgekehrtes Dach nach Anspruch 1, bei dem die permeable Membran ein Gewicht zwischen 4 und 7 kg/m² aufweist.
  3. Umgekehrtes Dach nach irgendeinem der vorstehenden Ansprüche, bei dem die Zungen (31) und Nuten (32) der Isolierungsbretter eine geringe Abkantung aufweisen, um ihren Einsatz und die Anordnung in einem Heringsgrätenmuster zu erleichtern.
  4. Umgekehrtes Dach nach irgendeinem der vorstehenden Ansprüche, bei dem die Dichte der geschäumten Polystyrolisolierungsbretter (30) 35 kg/m³ aufweist, und wobei sie eine Druckfestigkeit in der Größenordnung von 350 Kpa aufweisen.
  5. Umgekehrtes Dach nach irgendeinem der vorstehenden Ansprüche, bei dem die Isolierungsbretter (30) eine Dicke von 60, 75 oder 100 mm aufweisen, und wobei die Länge und die Breite der Bretter 1200 mm bzw. 600 mm beträgt.
  6. Umgekehrtes Dach nach irgendeinem der vorstehenden Ansprüche, bei dem die permeable Membran (35,36) die Form eines länglichen Streifens besitzt, die eine Breite aufweist, welche generell der der Länge jedes Isolierungsbretts (30) im Gebrauch entspricht, wobei die Streifen der permeablen Membran (35,36) im 45°-Winkel zu den Kanten der Bretter (30) im Heringsgrätenmuster gelegt sind, so daß sich jeder Streifen über eine Anzahl von Brettern (30) erstreckt.
  7. Umgekehrtes Dach nach irgendeinem der vorstehenden Ansprüche, bei dem die permeable Membran (35,36) aus einem wieder-verbundenen Gummischnitzelmaterial hergestellt worden ist.
  8. Umgekehrtes Dach nach irgendeinem der vorstehenden Ansprüche, bei dem die permeable Membran (35,36) an die Oberfläche der Isolierungsbretter (30) geklebt ist oder mit letzteren verbunden ist.
  9. Umgekehrtes Dach Anspruch 8, bei dem die Kanten der Streifen der permeablen Membran (35,36) mit den Isolierungsbrettern durch Klebestreifen verbunden sind.
EP90307196A 1989-07-03 1990-07-02 Umgekehrte Dachbauweise Expired - Lifetime EP0407118B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90307196T ATE87697T1 (de) 1989-07-03 1990-07-02 Umgekehrte dachbauweise.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8915236 1989-07-03
GB898915236A GB8915236D0 (en) 1989-07-03 1989-07-03 Inverted roof system

Publications (2)

Publication Number Publication Date
EP0407118A1 EP0407118A1 (de) 1991-01-09
EP0407118B1 true EP0407118B1 (de) 1993-03-31

Family

ID=10659464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90307196A Expired - Lifetime EP0407118B1 (de) 1989-07-03 1990-07-02 Umgekehrte Dachbauweise

Country Status (6)

Country Link
EP (1) EP0407118B1 (de)
AT (1) ATE87697T1 (de)
DE (1) DE69001210T2 (de)
DK (1) DK0407118T3 (de)
ES (1) ES2040058T3 (de)
GB (1) GB8915236D0 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1000049C1 (nl) * 1995-04-05 1996-10-08 Isobouw Systems Bv Dak- en/of wandbedekkingsconstructie alsmede paneel voor een dergelijke constructie.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1496377A (fr) * 1965-10-14 1967-09-29 Dow Chemical Co Structure de toit et son procédé de construction
FR2434909A1 (fr) * 1978-09-01 1980-03-28 Southern Chemicals Ltd Toit plat
DE3215172A1 (de) * 1982-04-23 1983-10-27 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen Dachkonstruktion
DK153899B (da) * 1984-02-24 1988-09-19 Rockwool Int Isolerende tagdaekning.
DE3444728A1 (de) * 1984-12-07 1986-06-12 Christoph M. 2808 Syke Franke Auf einem dach oder einer wand verlegbare daemmelemente, sowie daraus erstelltes umkehrdach

Also Published As

Publication number Publication date
DE69001210T2 (de) 1993-07-29
GB8915236D0 (en) 1989-08-23
EP0407118A1 (de) 1991-01-09
ATE87697T1 (de) 1993-04-15
ES2040058T3 (es) 1993-10-01
DK0407118T3 (da) 1993-08-09
DE69001210D1 (de) 1993-05-06

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