NZ733601A - Roof flashing with drainage apparatus and rainwater diffuser - Google Patents
Roof flashing with drainage apparatus and rainwater diffuserInfo
- Publication number
- NZ733601A NZ733601A NZ733601A NZ73360117A NZ733601A NZ 733601 A NZ733601 A NZ 733601A NZ 733601 A NZ733601 A NZ 733601A NZ 73360117 A NZ73360117 A NZ 73360117A NZ 733601 A NZ733601 A NZ 733601A
- Authority
- NZ
- New Zealand
- Prior art keywords
- water
- flashing
- roof
- pan
- drainage apparatus
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 186
- 230000035515 penetration Effects 0.000 claims abstract description 40
- 210000000088 Lip Anatomy 0.000 claims description 6
- 241000196435 Prunus domestica subsp. insititia Species 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 210000000614 Ribs Anatomy 0.000 description 3
- 239000000789 fastener Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- -1 aluminum-zinc Chemical compound 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Abstract
drainage apparatus to catch water flowing back from a roof penetration flashing to distribute water in a direction along the side of the flashing, the apparatus comprising one or more water collecting pans adapted for being positioned below at least a first roof panel for receiving the water flowing back from said at least one side of the roof penetration flashing and to direct the water onto another roof panel located at or along another side of the flashing. ng back from said at least one side of the roof penetration flashing and to direct the water onto another roof panel located at or along another side of the flashing.
Description
ROOF FLASHING WITH DRAINAGE APPARATUS AND RAINWATER
DIFFUSER
TECHNICAL FIELD
The present invention is directed to roof flashings and drainage apparatus
associated with weatherproof penetrations for directing rainwater about the
flashing. The invention is also directed to a diffuser which can be attached to
flashing to better direct rainwater about the flashing.
BACKGROUND
Any references to methods, apparatus or documents of the prior art are not to
be taken as constituting any evidence or admission that they formed, or form
part of the common general knowledge.
A roof often contains various objects passing through the roof. Such objects
are collectively known as “penetrations” or “roof penetrations” as they pass
through openings cut or otherwise formed in the roof sheets. The objects can
include vent pipes, various types of ducting including air-conditioning ducting,
light domes, skylights, roof ventilators (whirlybirds) and the like. The opening
itself in the roof is also known as a penetration.
To prevent water from passing into the opening cut into the roof, the
penetrations are waterproofed by a weather resistant barrier (WRB). These
barriers are often known as “flashing”.
Flashing refers to thin pieces of impervious material installed to prevent the
passage of water into a structure from a joint or as part of a weather resistant
barrier (WRB) system. Metal flashing materials include lead, aluminium,
copper, stainless steel, zinc alloy, other architectural metals or a metal with a
coating such as galvanized steel, lead-coated copper, anodized aluminum,
galvalume (aluminum-zinc alloy coated sheet steel) zincalume, and the like.
Nonmetal flashings are also known.
In commercial buildings or other large roofing areas, it is common for the roof
to have only a very slight pitch. The roof is essentially flat with only a slight
incline (sometimes only about 1°). To prevent water seeping through
overlapping roof sheets, the sheets have a high profile with upstanding ribs.
Adjacent sheets overlap over the rib area. The area between the ribs (often
called a pan or valley) channels water off the roof.
Other buildings have a greater roof pitch allowing corrugated metal roof
sheets to be used. Alternatively, concrete tiles can be used.
A problem with some flashings about roof penetrations is that rainwater must
flow over the roof from behind (upstream) the flashing, over part of the
flashing and back onto the roof in front (downstream) of the flashing. PRIOR
ART figure 1 illustrates this arrangement. Figure 2 illustrates the particular
problem with this arrangement. In figure 2, the flashing 10 extends over eight
pans 1-8. Water flowing down pans 1-8 behind the flashing must flow to each
side of the flashing and over each side flange 11-12 of the flashing. Thus, the
amount of water 13 flowing over each side flange 11-12 is four times the
volume flowing down each pan 1-8 behind the flashing. When this condensed
stream flows over the side flanges 11-12 and back into the downstream pans,
most of the water will flow into pans 1-2 and 7-8 and not pans 3-6. This can
cause roof drainage problems due to uneven flow along all the pans of the
roof sheets. Also, sometimes the roof penetration extends through a join
where two roofing sheets overlap each other. High flow volumes along a pan
adjacent an overlap between two roofing sheets can cause water to seep
through the overlap and into the interior of the building. Figure 2A discloses
the penetration flashing 10 in which water flowing down pans 1-8 behind the
flashing 10 is obstructed by the flashing and flows over side flanges 11 and
12. The side flanges 11 and 12 are positioned for directing the water further
towards the side pans S1 and S2.
These problems are present for commercial metal roofing having a low pitch.
However roofs with a steeper pitch and comprising corrugated roof sheets
also suffer from this problem, as do tile roofs where too high a water volume
flow can cause leakage between tiles.
It is an object of the invention to provide a solution to better manage water
flow around roof penetration flashing or other flashings that suffer from the
same disadvantage.
SUMMARY OF THE INVENTION
In a first aspect, the invention provides a drainage apparatus to catch water
flowing back from a roof penetration flashing to distribute water in a direction
along the side of the flashing, the apparatus comprising one or more water
collecting pans adapted for being positioned below at least a first roof panel
for receiving the water flowing back from said at least one side of the roof
penetration flashing and to direct the water onto another roof panel located at
or along another side of the flashing.
The provision of the said one or more pans below a roof panel in the
aforementioned configuration is advantageous particularly during weather
events accompanied by heavy rainfall. During such events water flow is often
obstructed by the roof penetration flashing. This problem may be further
exasperated by the accumulation of hail or debris on the roof. The invention of
the first aspect, in at least some embodiments, provides a drainage apparatus
that includes the one or more pans that are configured for catching any water
flowing back from the roof penetration flashing and re-distribute the water in a
direction along the side of the flashing.
Preferably, the drainage apparatus comprises at least a first pan and at least
a second pan.
In an embodiment, a water receiving portion of said at least first pan may be
positioned below an edge portion of said at least first roof panel. Preferably,
the water receiving portion of the first pan comprises an upturned wall located
adjacent to the edge portion of said at least first roof panel for preventing the
received water from spilling out of the first pan.
Preferably, the water receiving portion of the first pan is adapted for being
fastened onto a roof supporting member during use. Preferably, a fastening lip
portion on the second pan may be adapted to be fastened onto a roof
supporting member such as a roof truss during use. Furthermore, a
supporting bracket may be provided for supporting the first pan during use.
In an embodiment, the second pan may be adapted to be positioned for
receiving water from the first pan and for redirecting the received water onto
one or more other roof panels located at or along the side of the flashing.
Preferably, a water receiving portion of the second pan may be positioned
below the first pan, during use, for receiving the water from the first pan.
In an embodiment, the second pan comprises a water directing portion for
directing the received water towards one or more roof panels located at or
along one or more side of the flashing.
Preferably, the second pan comprises: a first water directing portion for
directing the collected water along a first lateral side of the flashing; and a
second water directing portion for directing the collected water along a second
lateral side of the flashing.
In one embodiment, the first water directing portion directs the received water
onto a first laterally located roof panel and the second water directing portion
directs the collected water onto a second laterally located roof panel, said
laterally located panels being located on a respective lateral side of the
flashing during use.
In another alternative embodiment, the first and second water directing
portions of the second pan are adapted for directing the received water onto
one or more roof panels located in front of the roof flashing during use.
In an embodiment, the second pan further comprises an upwardly projecting
wall portion for preventing flow of the received water towards the flashing
during use. Preferably, the upwardly projecting wall portion prevents the flow
of water towards the roof penetration.
Preferably, the roof penetration flashing comprises a front panel, a rear panel
and two or more side panels. For example, the roof penetration may be
square shaped and the drainage apparatus may be adapted to catch water
flowing back from a rear panel of the roof penetration flashing during use.
In an embodiment, at least a part of the second pan is positioned substantially
under the rear panel of the flashing during use.
In an embodiment, the drainage apparatus further comprises a spacer
member for being positioned in between an edge portion of the rear panel and
an adjacent roof panel, the member being provided for controlling flow rate of
water received into said one or more pans. Preferably, the spacer member
comprises a porous material. More preferably, the porous spacer member is
positioned for controlling the flow of water received into the first pan.
In another aspect, the invention comprises at least one water diffuser adapted
to catch water flowing along at least one side of roof penetration flashing and
to more evenly spread the water along the front of the flashing to provide
more even roof drainage.
In another form, the invention comprises penetration flashing comprising at
least one water diffuser adapted to catch water flowing along at least one side
of the flashing and to more evenly spread the water along the front of the
flashing to provide more even roof drainage.
In this manner, the diffuser can function to spread the condensed water
flowing along each side of the flashing back into a more even flow to pass
more evenly into each of the pans, valleys etc. in front of the roof penetration.
There is much less likelihood of water overflowing a particular pan and
possibly leaking into the roof (especially if there is an overlap between roof
sheets), and the water is drained more evenly into a collection gutter which
can also reduce the possibility of gutter overflow.
Suitably the, or a, diffuser catches water flowing along each side of the
flashing. It is envisaged that in most cases, the roof penetration will contain
flashing adjacent each side and in these circumstances it is preferred that the
diffuser catches water (that is "condensed" water) flowing along each side of
the flashing and spreading the water more evenly into all the downstream
pans/valleys etc.
Suitably, the diffuser comprises part of the flashing. It is considered that the
flashing can be shaped or configured to comprise part, or all of the diffuser.
However, it is also envisaged that the, or parts of the diffuser may comprise at
least one separate item that can be attached to part of the flashing or adjacent
the flashing or otherwise be associated with the flashing to more evenly
spread the water along the front of the flashing to provide more even roof
drainage.
The diffuser may be configured to cause water to flow more into the pans or
valleys of the roof sheets or members and less onto the ridges of the roof
sheets or roof members. It is considered more efficient if the diffuser can be
configured to divert water flow directly into the pans or valleys of the roof
sheets or tiles etc. as opposed to the ridges. The ridges may comprise
fastening screws and water may leak into the interior past the fastening
screws. Therefore, it is considered advantageous if the diffuser is configured
to divert water as much as possible away from the ridges of the roof sheets.
The penetration flashing can be used to flash various different types of
penetrations which will usually include air-conditioning ducting (especially for
commercial roofing), vent pipes, whirlybirds and similar devices, skylights and
the like. There may be circumstances where there is an advantage in
providing a water diffuser on roof flashing that comprises other than
penetration flashing to more evenly spread water flow along the roof. There
may be circumstances where there is an advantage in providing a water
diffuser on other types of flashing to more evenly spread water flow along the
roof.
The penetration flashing will typically comprise a rear panel, a front panel and
a pair of side panels. An upright collar portion is typically provided. The collar
portion may comprise part of each panel or may be formed separately. The
panels may also comprise separate pieces attached to each other or parts of
the penetration may comprise a common flashing. For instance, one piece of
flashing may be substantially U-shaped to comprise the back panel and each
side panel and a second piece of flashing may comprise the front panel.
For circular penetrations, the flashing may be as described above except that
the upright collar portion will be circular. However, the flashing itself may also
be substantially circular or have other shapes.
The flashing will typically comprise metal flashing but there may be
circumstances where plastic flashing or other types of flashing may be
suitable.
The flashing will typically comprise a number of separate pieces joined
together in the usual manner which may comprise fasteners such as screws
or rivets and/or silicone adhesive or other types of adhesive.
The diffuser will typically be positioned at, or substantially adjacent a front
edge of the front panel. Suitably, the diffuser will extend substantially along
the front edge of the front panel. In a preferred embodiment, the diffuser
extending along the front edge of the front panel comprises a single elongate
member. The length of the member can vary depending on the width of the
front panel of the flashing. As it is envisaged that the front panel will typically
have a length of between 50-250 cm, it is envisaged that the diffuser will also
have a length of between 50-250 cm.
It is also envisaged that the diffuser may comprise a plurality of smaller
elongate members. It is also envisaged that the diffuser may comprise a
telescopic member that can be extended to the desired length. The diffuser
may be cut to length.
The diffuser may comprise any suitable material. Suitably, the diffuser will be
made of material similar to the flashing material and thus will typically
comprise metal treated for corrosion resistance. However, the diffuser may
also be made of plastics material
The diffuser may comprise at least one upstanding wall adapted to catch
water. The upstanding wall will typically have a height sufficient to prevent
water from simply flowing over the top of the wall under usual water flow
conditions. The height will be dependent, inter alia, on the flow volumes about
each side of the flashing and this can be calculated. The height of the
upstanding wall may be sufficient to catch water flow from the largest type of
flashing and an advantage of this arrangement is that the diffuser will not
require many different types of wall heights. It is envisaged that for most
flashings a suitable wall height will be between 50-250mm.
The upstanding wall may be height adjustable to accommodate different water
flow volumes and velocities. In one form, an extension wall or panel may be
attached to the upstanding wall to increase the wall height. The extension
panel may extend substantially along the upstanding wall, or may extend only
at places where there is increased risk of water quickly overflowing the
existing upstanding wall. Thus a plurality of extension panels may be
provided.
The water diffuser may be provided with attachment means to enable the
diffuser to be attached to part of the flashing or to somewhere else to enable
the diffuser to function efficiently. It is considered expedient that the diffuser is
attached to the flashing and preferably adjacent the front edge of the front
panel of the flashing. A plurality of attachment means may be provided to
enable the diffuser to be attached to the flashing at a plurality of positions.
The attachment means may comprise a tab member. The tab member may
comprise part of the diffuser which is bent or otherwise configured to provide
the tab member. The diffuser will typically comprise a plurality of spaced apart
tab members. The members are suitably spaced to overlie the ridges of a roof
sheet. The tab members may be formed separately and fastened by any
suitable means to the remainder of the diffuser. As an example, the tab
members may be fastened in place and the remainder of the diffuser may be
clipped or press locked or otherwise attached to the tab members. This can
assist in divert in rain water away from the roof sheet ridges and into the roof
sheet pans. Thus, the tab member may comprise a combined function of
fastening the diffuser in place – typically on the flashing – and also functioning
as a deflector to deflect water away from the ridge of the roof sheets. This will
be described in greater detail below.
The attachment means may be associated with at least one, and preferably a
pair of bracket members. These can function as strengthening members to
prevent twisting or bowing of the diffuser. The bracket members can also
function to guide rain water into the roof pans.
The diffuser may comprise a secondary flow controller to further assist in
spreading the water along the front of the flashing. The secondary flow
controller may comprise a separate component. The separate component
may be attached to the flashing upstream from the remainder of the diffuser to
provide initial deflection of the rain water. The secondary flow controller may
alternatively comprise part of the remainder of the diffuser as opposed to
being a separate component.
Guide means may be provided on the flashing to guide rain water over the
flashing and towards the water diffuser. The guide means may comprise
upstanding walls on the side panels of the flashing. The upstanding walls may
be formed separately and attached to the flashing or may be bent up walls of
the flashing edge.
In another broad form of the invention, there is provided a water diffuser
adapted to catch water flowing along a roof and to more evenly spread the
water along the front of the diffuser to provide more even roof drainage.
According to a further aspect of the present invention there is provided a
diffuser in combination with a lateral wing or panel lapped over a wall along at
least one side panel of the diffuser for construction of a penetration
therethrough.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred features, embodiments and variations of the invention may be
discerned from the following Detailed Description which provides sufficient
information for those skilled in the art to perform the invention. The Detailed
Description is not to be regarded as limiting the scope of the preceding
Summary of the Invention in any way. The Detailed Description will make
reference to a number of drawings as follows:
Figure 1. Illustrates PRIOR ART roof penetration flashing.Figure 2.
Illustrates a front view of flashing.
Figure 2A. Illustrates another PRIOR ART roof penetration flashing.
Figure 3. Illustrates a water diffuser attached to the front edge of the front
panel of the flashing of figure 2.
Figure 4. Illustrates a rear view of the water diffuser of figure 3.
Figure 5. Illustrates a side view of the water diffuser attached to the front
edge of the roof flashing and also illustrating a secondary flow controller and
part of the guide means.
Figure 6. Illustrates a rear view of the water diffuser of figure 3.
Figure 7. Illustrates the water diffuser in use.
Figure 8. Illustrates a front view of the lower part of the water diffuser in
use.
Figure 9. Illustrates a top view of the water diffuser with a lateral wing
lapped over the side wall or guide of the diffuser.
Figure 10 Illustrates a schematic view of an embodiment of a drainage
apparatus 100.
Figure 11 Illustrates a schematic view of the second pan of the drainage
apparatus 100 as illustrated in Figure 10.
Figure 12 Illustrates a rear-perspective view of the drainage apparatus
100.
Figure 13 Illustrates a front-perspective view of the drainage apparatus
100.
Figure 14 Illustrates a rear-perspective view of the drainage apparatus 100
in a partially unassembled configuration.
Figure 15 Illustrates an enlarged rear-perspective view of the drainage
apparatus 100 shown in Figure 14.
Figure 16 Illustrates another rear-perspective view of the drainage
apparatus 100 in another partially unassembled configuration.
Figure 17 Illustrates an enlarged rear-perspective view of the drainage
apparatus 100 shown in Figure 16.
Figure 18 Illustrates an enlarged perspective view of the drainage
apparatus 100 in another partially unassembled configuration.
Figure 19 is a top perspective view of the drainage apparatus 100 in another
partially unassembled configuration.
Figure 20 is a frontal perspective view of the drainage apparatus 100 in
another partially unassembled configuration.
Figure 21 is a side-perspective view of the drainage apparatus 100 in another
partially unassembled configuration.
Figure 22 is a rear-perspective view of the drainage apparatus 100 in an
assembled configuration.
Figure 23 is a rear-perspective view of the drainage apparatus 100 in
accordance with another embodiment in an assembled configuration.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to the figures and initially to figures 3-8, there is illustrated a water
diffuser 15 adapted to catch water flowing along at least one side panel 11, 12
of roof penetration flashing 14 and to more evenly spread the water along the
front edge 22 (see figure 2) of the front panel 17 of the flashing to provide
more even roof drainage.
Specifically, the water diffuser 15 functions to intercept the condensed water
flow 13 flowing along each side panel 11, 12 of the flashing 14 (see figure 2)
and to divert this flow more evenly in each of the downstream pans 1-8.
Figure 2 illustrates flashing without the water diffuser and the condensed
water flow 13 passing over each side panel 11, 12 will predominantly flow into
pans 1-2 and 7-8 causing large amounts of water to flow in these pans with
very little water flowing into pans 3-6.
Figure 3 illustrates the flashing of figure 2 with the water diffuser 15 attached.
Water diffuser 15 is best illustrated in figures 4-6. Diffuser 15 in the particular
embodiment comprises an elongate upstanding wall 23 which extends entirely
across the front edge of the front panel 17 of the flashing.
Wall 23 comprises an upper horizontal part 30 and a lower horizontal part 31.
These are best illustrated in figure 8 and figure 3. Upper horizontal part 30
extends upwardly from the top of front panel 17 while lower horizontal part 31
contains the usual cutouts 32 to enable the lower horizontal part 31 to fit over
the roof ridges 21 and pans of the roof sheets. Also, when the diffuser is in
place, the lower horizontal part 31 overlies substantially the lower lip 33 (see
figure 2 and figure 8) of the front panel. To ensure even water flow, the lower
horizontal part 31 is spaced from the lower lip 33 such that water can flow
between the lower lip 33 of the front panel 17 and the lower horizontal part 31
of the wall 23 of the diffuser 15.
The spacing can be set to increase or decrease the water flow through the
diffuser.
The wall 23 contains a plurality of spaced apart attachment means 25 which,
in the particular embodiment, comprises bent out metal tab members 26.
Each tab member 26 is formed with an opening to enable a screw fastener 34
(see for instance figure 6) to fasten the diffuser to the edge of the front panel
17 of the flashing. Figure 5 partially illustrates an additional feature which
comprises an additional panel 24 (shown in outline only) which can function to
prevent water jumping over the diffuser front wall.
The attachment means 25 are spaced apart by a distance which is the same
as the spacing between the roof sheet ridges 21 (see for instance figure 6).
One advantage of this is that it ensures that the screw fastener 34 passes
through a ridge of a roof sheet which is required as opposed to passing
through the pan portion which is not allowed.
On each side of a tab member is a bracket member 27 comprising a pair of
spaced apart substantially triangular brackets. These can function to provide
rigidity to the diffuser to prevent deformation caused by the weight of water
pressing against the wall 23.
Referring to figure 6, it can be seen that tab member 26 prevents or
substantially reduces the ability of water flowing through the diffuser to flow
directly onto the roof ridge 21. Instead, tab member 26 assists in guiding the
water into each of the downstream pans (20 in figure 6) which is desirable.
A secondary flow controller 28 (see figure 5) is provided on the juncture of the
front panel 17 and side panel 12 (and 11) and is spaced upstream from wall
23. The secondary flow controller, in the preferred embodiment, comprises a
separate component having an upper wall portion 35 to initially intercept a
portion of the water (see figure 7) flowing over panel 11 or 12 and to divert this
water more towards a middle portion of diffuser 15. Controller 28 is formed
with a lower opening 36 to allow a portion of the water to flow directly to the
part of diffuser 15 immediately downstream from the controller. Controller 28
therefore functions to "split" the water flow into a lower portion that can flow
through opening 36 and against the diffuser, and an upper portion wall portion
35 that is deflected more towards a central part of the diffuser. Another
function of controller 28 is to slow the velocity of water passing over panel 11
or 12 which may otherwise strike an edge portion of the diffuser with sufficient
force to leap over the upstanding wall part 23 of the diffuser – which would be
undesirable.
A secondary flow controller 28 may be provided on each side panel 11, 12
and may be particularly suited for larger flow volumes along the side panels
11, 12.
Figure 7 and figure 8 illustrate the diffuser in use. Referring particularly to
figure 7, it can be seen that as water flows over side panel 11, part of the
water is intersected by the secondary flow controller 28 and diverted more to
the center of the diffuser. The water flows more evenly behind diffuser 15 and
over front panel 17. The diffuser allows the water to pass more evenly into
each of the downstream pans 1-8 (only pans 1-5 illustrated in figure 7). Figure
8 particularly illustrates pans 3-5 and shows how the diffuser 15 diverts water
flow into these pans which would otherwise receive very little water flow.
Referring again to figure 7, a guide means 29 in the form of an upstanding
wall or lip is provided at the edge of each side panel 11, 12 and this functions
to keep water on the side panel prevents this condensed water flow into an
adjacent pan (see for instance pan 37 in figure 3) which can cause uneven
water flow along the roof sheets. The wall 29 also adds structural integrity to
the diffuser. Furthermore, as shown in Figure 9, a lateral sheet or wing 39
may be provided in combination with the diffuser which has an edge lapped
over the side wall 29 of the diffuser. The lateral wing may be used as a base
for constructing further penetrations through the roof as desired.
Referring to Figures 10 to 23, a second embodiment of the present invention
in the form of drainage apparatus 100. Like reference numerals indicate like
features which have been previously described in earlier sections.
Drainage apparatus 100 is provided for catching water flowing back from a
roof penetration flashing 14, namely a rear flashing panel 18, to distribute
water in a direction along the side of the flashing 14. As a result, the drainage
apparatus prevents water from backing up at or around the rear flashing panel
18 and assists in redistributing any accumulated water along the sides of the
flashing. The drainage apparatus comprises two pans namely a first pan 120
and a second pan 140, positioned below roof panel 110 for receiving any
water flowing back from the flashing 14. The pans 120 and 140 are configured
for directing the received water onto roof panels located along the lateral sides
of the penetration or along lateral sides of the flashing 14.
The first pan 120 is positioned below roof panel 110 and below a rear panel
115 (that is located adjacent to the rear flashing panel 18). During a heavy
rainfall event, a relatively high volume of water may accumulate on the rear
flashing panel 18. Adjacently located rear panel 115 receives this water and
directs the water obstructed by the flashing 14 into the first pan 120. The first
pan 120 is positioned at relatively lower vertical height compared with the rear
panel 115. As a result, any excess or accumulated water flows into the first
pan 120. Advantageously, a porous spacer member 150 is positioned in
between roof panel 110 and rear panel 115 to control the flow of water into the
first pan 120. It is important to appreciate the adjacently located edge portions
of the rear panel 115 and the roof panel 110 define an opening 123 that
allows water to flow into the first pan 120. The water receiving portion of the
first pan120 includes an upturned wall that defines an edge of the first tray
and prevents water from spilling over the edge of the first pan 120. A lower
edge of the first pan 120 is supported by a supporting bracket 127 that is
positioned on a roof supporting member 129.
The second tray 140 is located adjacent to the first tray 120 at a slightly lower
vertical position to receive any water flowing from the first tray 120. As
illustrated particularly clearly in Figure 11, the second pan 140 is configured to
direct the water along the sides of the flashing 14. The second pan 140
includes a first directing portion 142 and a second water directing portion 144
separated by a flow restricting wall 143 that is positioned in between the two
water directing portions 142 and 144. During use, the water receiving end 145
of the second pan 140 is positioned adjacent to the first pan 120 for receiving
water. The base of the second pan 140 is adapted for directing the flow of
water to the water directing portions 142 and 144. The second pan 140 also
includes upturned wall portions 147 and 149 located along lateral sides of the
second pan 140 for further directing the flow of water along the flow directing
portions 142 and 144 and prevent the water from spilling over the lateral sides
of the second pan 140.
The flow directing portions 142 and 144 are each fastened onto a respective
roof panels 192 and 194 which are located on either lateral side of the flashing
14. During the installation process, the flow directing portions 142 and 144 are
fastened onto and received upon the respective roof panels 192 and 194 to
allow water from the flow directing portions 142 and 144 to flow onto the
laterally located roof panels 192 and 194. As shown particularly clearly in
Figures 17 and 18, flow directing portions 142 and 144 are fastened to roof
panels 192 and 194 by way of fastening screws 141. A gap filling sealant may
also be used for ensuring that the flow directing portions 142 and 144 for a
water tight seal with the respective roof panels 192 and 194. In this manner,
the water that flows back due to being obstructed by the flashing 14 flows
back and then around the flashing 14 along the lateral roof panels 192 and
194.
Turning to Figure 21 it must be pointed out that that the second tray 140 is
concealed or hidden under a roof sheeting panel 113 that is positioned in a
spaced relationship relative to the second pan 140. The roof sheeting panel
113 is also provided for supporting rear flashing panel 18. Side flashing
panels 11 and 12 are positioned above laterally located roof panels 192 and
194. The configuration of the concealed first and second pans 120 and 140 in
combination with the laterally located roof panels 192 and 194 provides a
concealed flow path that is substantially located under the flashing panels 11,
12, 17 and 18. As a result, during use, the drainage assembly 100 is
substantially hidden from plain sight of the user.
Turning to Figure 23, in another alternative embodiment, the flow directing
rear panel 115 may be provided with flow directing projections in the form of
profiled portions 111 for directing water into the first pan 120. Advantageously,
the profiled portions 111 comprise a progressively increasing height of
projection in a direction towards the first pan 120 which assist in directing a
high volume of water into the first pan in comparison with the a flat rear panel
115 illustrated in Figure 22.
USE FOR THE INVENTION
The above description identifies at least one specific, substantial and credible
use for the invention. Specifically the diffuser demonstrates that it is now
possible to maintain even water flow about a flashed off penetration thereby
reducing the possibility of gutter overflow and roof leakage.
In compliance with the statute, the invention has been described in language
more or less specific to structural or methodical features. The term
“comprises” and its variations, such as “comprising” and “comprised of” is
used throughout in an inclusive sense and not to the exclusion of any
additional features. It is to be understood that the invention is not limited to
specific features shown or described since the means herein described
comprises preferred forms of putting the invention into effect. The invention is,
therefore, claimed in any of its forms or modifications within the proper scope
of the appended claims appropriately interpreted by those skilled in the art.
Throughout the specification and claims (if present), unless the context
requires otherwise, the term "substantially" or "about" will be understood to
not be limited to the value for the range qualified by the terms.
Any embodiment of the invention is meant to be illustrative only and is not
meant to be limiting to the invention. Therefore, it should be appreciated that
various other changes and modifications can be made to any embodiment
described without departing from the spirit and scope of the invention.
Claims (13)
1. A drainage apparatus to catch water flowing back from a roof penetration flashing to distribute water in a direction along the side of the flashing, the apparatus comprising one or more water collecting pans adapted for being positioned below at least a first roof panel for receiving the water flowing back from said at least one side of the roof penetration flashing and to direct the water onto another roof panel located at or along another side of the flashing.
2. A drainage apparatus in accordance with claim 1 wherein a water receiving portion of said at least a first pan is positioned below an edge portion of said at least first roof panel.
3. A drainage apparatus in accordance with claim 2 wherein the water receiving portion of the first pan comprises an upturned wall located adjacent to the edge portion of said at least first roof panel for preventing the received water from spilling out of the first pan.
4. A drainage apparatus in accordance with claim 2 or claim 3 wherein the water receiving portion of the first pan is adapted for being fastened onto a roof supporting member during use.
5. A drainage apparatus in accordance with claim 4 wherein a fastening lip on the water receiving portion of the first pan is adapted to be fastened onto the roof supporting member.
6. A drainage apparatus in accordance with any one of the preceding claims further comprising at least a second pan.
7. A drainage apparatus in accordance with claim 6 wherein the second pan is adapted to be positioned for receiving water from the first pan and for redirecting the received water onto one or more other roof panels located at or along another side of the flashing.
8. A drainage apparatus in accordance with claim 7 wherein a water receiving portion of the second pan is positioned below the first panel for receiving the water from the first pan.
9. A drainage apparatus in accordance with any one of claims 7 or 8 wherein the second pan comprises at least one water directing portion for directing the received water towards one or more roof panels located at or along one or more side of the flashing.
10. A drainage apparatus in accordance with claim 9 wherein the second pan comprises: a first water directing portion for directing the collected water in a direction along a first lateral side of the flashing; and a second water directing portion for directing the collected water in a direction along a second lateral side of the flashing.
11. A drainage apparatus in accordance with claim 10 wherein the first water directing portion directs the received water onto a first laterally located roof panel and the second water directing portion directs the collected water onto a second laterally located roof panel, said laterally located panels being located on a respective lateral side of the flashing during use.
12. A drainage apparatus in accordance with claim 10 wherein the first and second water directing portions of the second pan are adapted for directing the received water onto one or more roof panels located in front of the roof flashing during use.
13. A drainage apparatus in accordance with any one of claims 6 to 12 wherein the second pan further comprises an upwardly projecting wall portion for preventing flow of the received water towards the flashing during use. *****************
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2016902699 | 2016-07-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ733601A true NZ733601A (en) |
Family
ID=
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20220136251A1 (en) | Raised Arc Rain Gutter Debris Preclusion Device | |
US8322082B2 (en) | Gutter cover with snap-in hanger attachment | |
US8677695B2 (en) | Eaves trough detritus deterrent appliance | |
US6412228B1 (en) | Leaf and debris deflecting cover device for a rain gutter | |
US8028474B2 (en) | Rain gutter debris prophylactic | |
US20070094939A1 (en) | Gutter cover with passive ice and snow melt | |
US4391068A (en) | Water deflector | |
US10100522B2 (en) | Low-profile rain gutter screen | |
US8978312B2 (en) | Rainwater runoff diverting attachment for building roofs | |
US10519668B1 (en) | Apparatus for prevention of pests and debris from gutters | |
US20140202086A1 (en) | Gutter protection system | |
AU2017204648B2 (en) | Roof flashing with drainage apparatus and rainwater diffuser | |
AU2016101073B4 (en) | Roof Flashing with Rainwater Diffuser | |
NZ733601A (en) | Roof flashing with drainage apparatus and rainwater diffuser | |
US20140069027A1 (en) | Gutter Protection System | |
US20140069029A1 (en) | Accessory roof panel and hanger | |
US10619352B1 (en) | Rain gutter for tin roof or the like | |
AU2016228262B2 (en) | A multi-part roof flashing assembly | |
JP7497282B2 (en) | Eaves structure | |
NZ714539A (en) | Improvements in the weatherproofing of roofs | |
AU2005248957A1 (en) | Valley Tray |