GB2400385A

GB2400385A - Insulated roof construction

Info

Publication number: GB2400385A
Application number: GB0406535A
Authority: GB
Inventors: Joerg Trotter
Original assignee: Corus Bausysteme GmbH
Current assignee: Kalzip GmbH
Priority date: 2003-04-07
Filing date: 2004-03-24
Publication date: 2004-10-13
Anticipated expiration: 2024-03-24
Also published as: NL1025866A1; GB0406535D0; NL1025866C2; GB2400385B; DE102004012410A1; FR2853340A1; DE202004003934U1

Abstract

A roof comprises a lower deck 3, a support system 8 which is affixed to deck 3, and bears outer covering sheets 12, and a heat insulation layer between the support system and the roof deck, and is characterised in that the support system comprises spaced rails 9, which are laid on tread - safe heat insulation strips 6, and the space between strips 6 is filled with a softer heat insulation material 7. The rails 9 may bear headed fasteners 10 which co-operate with shaped ends 13, 14 of the outer roof panels, and a further insulation layer 15 may fill the remaining space under outer panels 12. Deck 3 may comprise trapezoidal profile steel sheets, a vapour barrier 4 may be present, and insulation may be of mineral fibre or foam material.

Description

ROOF CONSTRUCTION

The present invention relates to a roof construction with a roof deck, a support system which is affixed to the roof deck, and a heat insulation layer provided between the support system and the roof deck.

Roof constructions of the type mentioned above are already known from, for example, EP 0685612-A1. These roof constructions have a roof deck in the form of a steel trapezoidal profile under-shell, which bears a heat insulation layer on which in turn outer covering sheets are fitted via a support system. Here, the support system can be designed (cf. WO00/40823) such that the outer covering sheets are held at a distance to the roof deck or to the heat insulation layer. In this case, the support system consists of support rails screwed onto the roof deck, and support elements set into them.

In the case of the roof constructions described above, the heat insulation layer is usually formed of tread-safe continuous fibre insulation boards. Through this, the risk of treading through the vapour barriers lying underneath is prevented. However, a problem lies in the fact that the fibre insulation boards are comparatively expensive to manufacture, and are also heavy and bulky, so that transport and handling problems can occur. It is also regarded as problematic that when laying the fibre insulation boards, one already has to establish the positions at which the support system will later be connected to the steel trapezoidal profile under-shell via corresponding screws, since after the fibre insulation boards have been laid, the support points on the trapezoidal profiles are no longer visible.

Against this background, the invention is based on the task of designing a roof construction of the type mentioned at the outset, in such a way that assembly can be facilitated and the costs can be lowered.

This task is fulfilled according to the invention in that the support system has support rails arranged spaced apart from one another, on which the outer covering sheets are fitted, wherein the support rails are laidron tread-safe heat insulation strips of the heat insulation layer, and the intermediate space between the tread-safe heat insulation strips is filled with a soft heat insulation material.

The invention is thus based on the idea of designing the heat insulation layer of a tread-safe insulation material in the form of heat insulation strips only in those areas in which the support rails of the support system are laid, and for the rest to use economical soft heat insulation material. Compared with the fibre insulation boards used to date, these narrow heat insulation strips have the advantage that they are lighter in weight and easier to handle. Furthermore, the heat insulations strips have the advantage that the fixing points on the roof deck can still be seen or felt through the vapour barrier, so that the support rails can easily be fixed, for example screwed, to the roof deck through the heat insulation strips. Here, the support rails can be positioned on the tread- safe heat insulation strips. Alternatively, it is possible to arrange the support rails at least partially countersunk in the heat insulation strips.

The result is that the roof construction according to the invention is comparatively economical and easy to manufacture.

In a development of the invention, it can be envisaged that the roof deck is formed by a steel trapezoidal profile under-shell, and the support rails are respectively connected to the frontal faces of the steel trapezoidal profile on which they are supported. In this case, the roof construction according to the invention is particularly advantageous, since the edges of the steel trapezoidal profile can be felt.

Where a support system is used, as described for example in WO 00/40823, in which the outer covering sheets are held spaced apart from the support rails, a further heat insulation layer can be provided between the heat insulation layer and the outer covering sheets; this preferably consists of a soft heat insulation material, and in particular completely fills out the space available between the outer covering sheets and the heat insulation layer that is present. Through this, for one thing the thermal insulation is improved. Furthermore, the formation of condensation water is counteracted, and drumming sounds during downpours are muffled.

This further heat insulation layer can be designed as a mineral fibre insulation layer or foamed material layer.

In respect of further advantageous embodiments and advantages of the invention, reference is made to the dependent claims as well as to the following description of a design example, with reference to the enclosed drawing. The drawing shows the following: Fig. 1 shows a first design form of a roof construction in accordance with the invention, in crosssection; Fig. 2 shows a further design form of a roof construction in accordance with the invention, in cross-section; and Fig. 3 shows a part of the support system that is used in the roof construction according to Figs. 1 and 2, in perspective view.

Shown in Fig. 1 is a first embodiment of a roof construction 1 in accordance with this invention. This roof construction 1 rests on roof trusses 2 which are arranged at regular intervals, and it comprises a roof deck in the form of a steel trapezoidal profile under-shell 3 which is covered by a thin vapour barrier 4. Provided on the vapour barrier 4 is a heat insulation layer 5 which is formed of several heat insulation strips 6 which are made of a tread-safe material and are arranged roughly parallel to one another, with comparatively soft heat insulation material 7 arranged in between. As can be seen clearly from Fig. 1, here the treadsafe heat insulation strips 6 are arranged obliquely to the longitudinal direction of the trapezoidal profiles of the under-shell 3. The heat insulation strips 6 preferably have a width no greater than 50cm, in particular no greater than 30 cm.

Laid on the tread-safe heat strips 6 are the support rails 9 of a support system, which are connected by means of th indicated screws 8 to the frontal faces of the steel trapezoidal under-shell 3 on which the vapour barrier 4 rests and on which the heat insulation layer 5 is supported, wherein by means of the screw connection the heat insulation layer 5, which is arranged between the support rails 9 and the steel trapezoidal under-shell 3, is also held tight on the steel trapezoidal under- shell 3. On both sides, the support rails 9 have U-shaped holding lips 9a, 9b, into which support elements 10 are set at regular intervals (cf. in detail WO 00/40823 and Fig. 3). These support elements 10 have a bar that projects upwards, and which is equipped with a thickened holding profile 11 at its free end.

The support elements 10 bear outer covering plates 12 in the form of profiled metal plates, which have holding lips 13, 14 at their two longitudinal edges. The holding lips 13, 14 overlap the support profiles 12 of the support elements 10, wherein the respectively adjacent holding lips also overlap one another.

Arranged between the outer covering plates 12 and the heat insulation layer 5 is a further heat insulation layer 15 of compressed mineral fibres, for example a rock wool insulation felt, which improves the heat insulation, avoids the formation of condensation water, and muffles drumming noises during downpours.

The embodiment shown in Fig. 2 of a roof construction 1 in accordance with the invention differs from the embodiment described previously and shown in Fig. 1 in that the support rails 9 are arranged countersunk in the tread-safe heat insulation strips 6, to which end the heat insulation strips 6 have corresponding recesses 16.

The roof construction 1 in accordance with the invention offers the advantage of simple assembly. Specifically, first of all the roof deck 3 is mounted on the roof trusses 2, and the vapour barrier 4 is laid on top. On the vapour barrier 4, the tread-safe heat insulation strips 6 are laid diagonally or cross-wise to the longitudinal direction of the trapezoidal profiles of the roof deck 3, and the support rails 9 are positioned on the heat insulation strips 6 and are connected by means of the screws 8 to the frontal faces 3a of the steel trapezoidal under-shell 3 on which the vapour barrier 4 rests and on which the heat insulation strips 6 are supported. Alternatively, the heat insulation strips 6 can be used with support rails 9 that have already been pre-mounted. Since the roof deck 3 is visible and can also be felt through the vapour barrier 4, fixing the support rails 9 is very simple. After the support rails 9 have been fitted, the intermediate spaces between the tread-safe heat insulation strips 6 are filled with a soft heat insulation material 7. Expediently, an insulation material 7 in the form of runs can be used for this, wherein the distances between the heat insulation strips 6 are then chosen according to the run width.

Following on from that, the support elements 10 and outer covering sheets 12 are fitted on the support rails 9, and parallel with this the further heat insulation layer 15 Is laid. During this assembly process, the first heat insulation layer 5 can be walked on via the heat insulation strips 6, so that the soft heat insulation material 7 need not be walked on and accordingly there is no risk of trampling it.

Claims

1. Roof construction with a roof deck (3), a support system (8) which is affixed to the roof deck (3) and which bears outing covering sheets (12), and a heat insulation layer (5) provided between the support system and the roof deck (3), characterized in that the support system has support rails (9) arranged spaced apart from one another, on which the outer covering sheets (12) are fitted, wherein the support rails (9) are laid on tread-safe heat insulation strips (6) of the heat insulation layer (5), and the intermediate space between the tread-safe heat insulation strips (6) is filled with a soft heat insulation material (7).

2. Roof construction in accordance with claim 1, characterized in that the support rails (9) are connected, in particular screwed, to the roof deck (3).

3. Roof construction in accordance with one of the preceding claims, characterized in that the support rails (9) are arranged countersunk in the tread-safe heat insulation strips (6).

4. Roof construction in accordance with one of the preceding claims, characterized in that the roof deck is formed by a steel trapezoidal profile under-shell (3), and the support rails (9) are respectively connected to the frontal faces of the steel trapezoidal profile under shell on which they are supported.

5. Roof construction in accordance with one of the preceding claims, charactersed in that a further insulation layer (15) is provided between the heat insulation layer (5) and the outer covering sheets (12).

6. Roof construction in accordance with claim 5, characterized in that the space available between the outer covering sheets (12) and the heat insulation layer (5) is completely filled out by the further heat insulation layer (15).

7. Roof construction in accordance with claim 5 or 6, characterized in that the further heat insulation layer (15) is designed alma mineral fibre layer or foamed material layer.

8. Roof construction in accordance with claim 7, characterized in that the further heat insulation layer (15) comprises compressed mineral fibres, in particular rock wool insulation felt.

9. Roof construction in accordance with one of the preceding claims, characterized in that a vapour barrier (4) is provided between the roof deck (3) and heat insulation layer (5) that rests on it.

10. Roof construction in accordance with one of the preceding claims, characterized in that the heat insulation strips (6) run cross-wise to the outer covering sheets (12), in particular diagonally to the outer covering sheets (12).

11. Roof construction in accordance with one of the preceding claims, characterized in that the heat insulation strips (6) have a width no greater than 50 cm.