FI98646B - Roof drains arrangement on flat roofs with foil covering - Google Patents

Abstract

A roof drains arrangement on a flat roof with insulating covering, which arrangement comprises a roof drain 2 and a grate 4 placed over the roof drain 2, which grate 4 has openings 4a through which water can flow. The arrangement further incorporates stone material 5 spread around and over the grate 4 to form a stack such that the water running to the roof drain has to flow through the stone material before reaching the grate 4 and, via this, the roof drain 2. Rubbish and other impurities accompanying the water thus become trapped in the stone material without clogging up the grate 4, so that the grate 4 and its surroundings require less frequent cleaning than previously. <IMAGE>

Description

98646

Arrangement in connection with roof wells for cream-coated flat roofs

The invention relates to an arrangement in connection with roof wells of cream-coated flat roofs 5, which arrangement comprises a roof well, a grate placed on top of the roof well and having openings through which water can flow and aggregate placed around the grate.

The problem with flat-roofed cream roofs is that debris, leaves, conifer needles, pollen, etc. entering the roof easily clog the roof screen, causing water to stand on the roof and even the slight weakness in the roof joints and joints causing water to penetrate the structures, causing water damage.

15 Known roof manhole solutions have not been able to prevent the manhole from becoming blocked, so the phenomenon can cause great damage every year.

DE 2 151 306 discloses a manhole arrangement in which a lower layer of gravel than the grid is placed on the flange of the grate of the roof well to ensure the attachment of the grille. However, in the context of this arrangement, for example, in heavy rain with a large amount of water »·. *; debris and other contaminants are transferred to the grate · clog the grate openings, preventing water from entering the roof: **: 25 well. Furthermore, in the context of that arrangement *: ♦ the manhole and the top of the downspout in question are exposed to the adverse effects of changes in outdoor temperature.

* · · *: *. FI patent publication 35134 discloses a roof manhole with an upwardly tapering truncated cone. 30 is shaped and the openings in the grille are angular. However, this manhole is completely exposed to debris, leaves • · · * * and other contaminants, which easily clogs the roof sieve and leaves water standing on the manhole, which easily causes water damage.

.1. 35 SE 416 154 discloses a manhole in which balls made of heat-insulating material are used as thermal insulation. However, the balls are placed inside the cassette, allowing leaves, debris and other contaminants to clog the cassette. outside, jol-5 created a manhole clogged.

The object of the present invention is to provide an arrangement in which the above-mentioned drawbacks do not occur.

The arrangement according to the invention is characterized in that the aggregate acting as a filter forms a heap 10 which extends around and on the grating.

The essential idea of the invention is that a grate is mounted on top of the roof well, around and on top of which suitable aggregate is spread so that the water entering the roof well has to flow through the filter material before it enters the grate and through it into the roof well. The idea of yet another embodiment is that the grating is in the shape of an upwardly tapering truncated cone. The idea of yet another third embodiment is that the aggregate is substantially round and the holes in the grating are substantially angular.

The advantage of the invention is that the water * entering the roof well has to flow through the aggregate, whereby debris and other impurities remain among the aggregate acting as a filter, and do not support the grate, whereby cleaning the grate and its environment can be do less often than before without clogging the manhole. A further advantage of the invention is that the aggregate around and on the grating acts as a heat insulator, thus inside the downcomer. 30 incoming warm air helps to better • • · Γ ”keep the roof well melted and, on the other hand, fluctuations in the outdoor temperature do not have the same effect as before on the connection between the downhole roof roof and the roof structure. Another advantage of the preferred embodiment is that when the aggregate is round and the grate holes are angular, the aggregate is in no case able to block the grate holes. Furthermore, the clogging of the grate holes caused by the water surface tension does not occur as easily as in the case of round holes.

The invention is explained in more detail in the accompanying figure, which schematically shows a roof well arrangement according to the invention seen from the side and in cross-section.

For the sake of clarity, only the roof 1 as a roof covering is shown in the figure for the flat roof structure.

10 Of course, there can also be several layers of cream if necessary. Along the surface of the cream 1, the water flows into the roof well 2 and from there on into a downspout or rainwater drain in a manner known per se. At the level of the upper edge of the roof well 2 there may be a screen 3, the function of which is to prevent debris and other contaminants from entering the roof well 2. An upwardly tapering frustoconical grate 4 is placed on top of the roof well 2. The grate 4 has openings 4a through which water can flow. A suitable ki-20 of material 5 is applied to a suitable wide area around the grate 4 and on the cover of the grate 4 so that the water entering the roof well 2 has to flow through the aggregate 5 before it enters the grate 4 and through it to the roof well 2.

• · *. * * The aggregate 5 around and on the grating 4 »»: acts as a thermal insulator, whereby possible * * *: 25 e *: * warm air coming through a sewer or downpipe, for example, can heat the vicinity of the manhole 2. - * work, in which case possible problems due to freezing ··· · are reduced and, on the other hand, temperature fluctuations, which affect, for example, the junction of the roof well 2 and the roof structure # ^ 30, are also reduced.

ΓΓΙ The shape of the upwardly tapering truncated cone of the grate 4 • · · * ·) 'helps the grate 4 to remain open, as the water in the openings 4a is pulled down by gravity, so that the water does not ·: · ♦ · support the openings 4a as easily as a straight-walled grille. openings. Furthermore, the angular shape of the openings 4a • «• ♦« ·· • · 98646 4 to 4 means that the blockage of the opening 4a caused by the water surface tension does not occur as easily as, for example, in the case of round openings. Furthermore, when the stone pieces of the aggregate 5 are substantially round 5, they cannot block the angular hole 4a in any situation and on the other hand the circular stone has a large flow surface, whereby the aggregate 5 acts effectively as a filter and prevents the roof well 2 from clogging even in poor conditions. The stone pieces 10 of the aggregate 5 are naturally larger in size than the holes 4a.

The figure and the related description are only intended to illustrate the idea of the invention. The details of the invention may vary within the scope of the claims.

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Claims (4)

An arrangement at roof wells of flat roofs with foil coating, which comprises a roof well 5 (2), a grid (4) arranged over the roof well (2) and which grid (4) has openings (4a) through which water can flow. and stone material (5) arranged around the grid (4), characterized in that the stone material (5) acting as a filter forms a stack extending around and above the grid (4). 2. Arrangement according to claim 1, characterized in that the grating (4) is formed as an eaten tapered truncated cone in a manner known per se. Arrangement according to claim 1 or 2, characterized in that the openings (4a) of the grid (4) are substantially angular in a manner known per se. Arrangement according to claim 3, characterized in that the stones of the stone material (5) are substantially round. »· · · · · 1 ·» · · ··· * ·· »•» »· ·· • · • ·» • 1 • · ·· ·· • · · · · «»> ·· ···· · · ··· »···» ·