EP0407118A1 - Système de toiture inversé - Google Patents

Système de toiture inversé Download PDF

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Publication number
EP0407118A1
EP0407118A1 EP90307196A EP90307196A EP0407118A1 EP 0407118 A1 EP0407118 A1 EP 0407118A1 EP 90307196 A EP90307196 A EP 90307196A EP 90307196 A EP90307196 A EP 90307196A EP 0407118 A1 EP0407118 A1 EP 0407118A1
Authority
EP
European Patent Office
Prior art keywords
roof
insulation boards
permeable membrane
boards
inverted
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
EP90307196A
Other languages
German (de)
English (en)
Other versions
EP0407118B1 (fr
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
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 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/fr
Application granted granted Critical
Publication of EP0407118B1 publication Critical patent/EP0407118B1/fr
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.
  • 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.
  • 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.
  • an additional restraint in the form of additional ballasting, mechanical fixing or adhesion to the membrane, or a combination of them around the periphery of the roof is also required.
  • 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.
  • 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.
  • an inverted roof system for insulating an existing flat roof comprises rectangular, foamed polystyrene insulation boards each having a ratio of long to short side of 2:1 with tongues formed on adjacent long and short sides 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.
  • 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)
  • Tents Or Canopies (AREA)
  • Ship Loading And Unloading (AREA)
  • Greenhouses (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
EP90307196A 1989-07-03 1990-07-02 Système de toiture inversé Expired - Lifetime EP0407118B1 (fr)

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
GB898915236A GB8915236D0 (en) 1989-07-03 1989-07-03 Inverted roof system
GB8915236 1989-07-03

Publications (2)

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

Family

ID=10659464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90307196A Expired - Lifetime EP0407118B1 (fr) 1989-07-03 1990-07-02 Système de toiture inversé

Country Status (6)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736641A1 (fr) * 1995-04-05 1996-10-09 Isobouw Systems B.V. Construction de revêtement pour toit et/ou paroi, ainsi que panneau à utiliser dans cette construction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1103015A (en) * 1965-10-14 1968-02-14 Dow Chemical Co A roof structure and a method of constructing a roof
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
GB2154624A (en) * 1984-02-24 1985-09-11 Rockwool Int Exterior thermal insulation for roofs
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1103015A (en) * 1965-10-14 1968-02-14 Dow Chemical Co A roof structure and a method of constructing a roof
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
GB2154624A (en) * 1984-02-24 1985-09-11 Rockwool Int Exterior thermal insulation for roofs
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736641A1 (fr) * 1995-04-05 1996-10-09 Isobouw Systems B.V. Construction de revêtement pour toit et/ou paroi, ainsi que panneau à utiliser dans cette construction

Also Published As

Publication number Publication date
ES2040058T3 (es) 1993-10-01
DE69001210T2 (de) 1993-07-29
DE69001210D1 (de) 1993-05-06
GB8915236D0 (en) 1989-08-23
EP0407118B1 (fr) 1993-03-31
ATE87697T1 (de) 1993-04-15
DK0407118T3 (da) 1993-08-09

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