U.S. patent number 3,668,811 [Application Number 05/026,842] was granted by the patent office on 1972-06-13 for coping and fascia trim.
Invention is credited to Kenneth Lloyd Pollard.
United States Patent |
3,668,811 |
Pollard |
June 13, 1972 |
COPING AND FASCIA TRIM
Abstract
Coping and fascia trim for the edge of a building structure is
comprised of a pair of elongated interconnectable trim strips each
having a continuous anchor flange securable to the roof and a skirt
depending to overlie the building facade. The strips are
interconnected by a tongue and stirrup at the skirt edges and are
dimensioned to provide spacing between the anchor flanges for a
roofing layer. Optionally the trim may accommodate fascia
insulating board between the skirts and roof insulation board
between the anchor flanges.
Inventors: |
Pollard; Kenneth Lloyd (West
Hill, Ontario, CA) |
Family
ID: |
21834106 |
Appl.
No.: |
05/026,842 |
Filed: |
April 9, 1970 |
Current U.S.
Class: |
52/94; 52/60;
52/96 |
Current CPC
Class: |
E04D
13/15 (20130101) |
Current International
Class: |
E04D
13/15 (20060101); E04d 013/15 () |
Field of
Search: |
;52/60,94,95,96 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Abbott; Frank L.
Assistant Examiner: Raduazo; Henry E.
Claims
What I claim is:
1. Coping and fascia trim in combination with the roof edge of a
building comprising:
a coping strip and a fascia strip, each strip having a roof anchor
portion by which it is secured directly to the roof of a building
and a skirt portion integrally joined thereto at a juncture and
depending from said juncture to overlie the facade of the building
below the roof edge;
the respective skirts having free edges remote from said
juncture;
co-operating formations at said free skirt edges forming an
interconnection between said coping and fascia strips, and
a relatively thick insulating fascia board installed between said
skirts and seated at the interconnection formed thereby to insulate
the wall of the building adjacent the roof edge;
said coping and fascia strips being assembled in superposed
relation with their free skirt edges interconnected as aforesaid
and their roof anchor portions spaced and disposed to sandwich
roofing material between them.
2. The combination as claimed in claim 1 wherein:
said roof anchor portion and said skirt, in each said strip, are
each planar and extend continuously in the direction of the length
of the strip.
3. The combination as claimed in claim 1 wherein:
said juncture between said roof anchor portion and said skirt on
the coping strip is contoured to provide a dam for inhibiting flow
of liquifiable roofing materials from said roof anchor portion over
said skirt.
4. The combination as claimed in claim 1 wherein:
said juncture between the roof anchor portion and the skirt on the
fascia strip is contoured to provide an abutment to extend above
the plane of said roof anchor portion and to form a gravel stop
thereupon.
5. The combination as claimed in claim 1 wherein:
said strips are relatively proportioned for providing accommodation
for insulating board between said roof anchor portions together
with the roof material aforesaid.
6. The combination as claimed in claim 5 wherein:
said strips are relatively proportioned to provide spacing between
said skirts accommodating fascia board therebetween to extend above
the level of the said insulating board accommodated between said
roof anchor portions.
7. The combination as claimed in claim 5 wherein:
said coping strip is perforated at positions locatable adjacent the
edges of said insulating board for providing venting of pressurized
air entrapped under the roof material.
8. The combination as claimed in claim 1 wherein:
said skirt of the fascia strip extends above the level of the roof
anchor portion thereof and said strip is contoured to provide an
integral cant strip extending from said skirt above the level of
said roof anchor portion towards said portion providing support on
said cant strip for roof material.
9. The combination as claimed in claim 8 wherein:
said fascia strip is further contoured to provide an abutment above
the level of the cant strip to form a gravel stop for roof material
located thereon.
10. The combination as claimed in claim 1 wherein:
said formations comprise a tongue constituted by the free edge of
one skirt and a stirrup constituted by the free edge of the other
skirt; the tongue being engageable in said stirrup to effect the
interconnection aforesaid.
11. The combination as claimed in claim 10 wherein:
said stirrup is dimensioned to receive said fascia board therein
together with said tongue.
12. The combination as claimed in claim 11 wherein:
said tongue is constituted by the free edge of the fascia strip
skirt and said stirrup is provided at the free edge of the coping
strip skirt.
Description
This invention relates to coping and fascia trim for use on a roof
in a building structure and the invention particularly contemplates
such a trim for use in a flat-roofed building.
Known forms of flat-roofed building structure include the provision
of one or more layers of roof material located over a roof deck
wherein it is necessary that such roof material be securely
anchored in position to prevent lift-off under high wind conditions
for example. Evidently occurrence of such lift-off is likely to
commence around the edges of the roof material, which generally
extends to the edge of the roof itself, and it is therefore a broad
object of the invention to provide trim which is anchorable to the
roof and which will also function to anchor roof material in
position on the roof.
It is a further object of the invention to provide trim comprising
two separate coping and fascia strips anchorable to the roof,
interconnectable together, and relatively proportioned to provide
accommodation therebetween for roof material to be anchored in
position on the roof.
Such trim besides anchoring the roof material in position on the
roof may conveniently also function to provide a facing depending
from the roof edge for insulating and/or decorative purposes.
Accordingly it is a yet further object to provide trim anchorable
to the roof and having facing depending integrally therefrom
locatable at the roof edge generally to overlie the facade of the
building structure adjacent said roof edge.
In accordance with the present invention the instant trim comprises
fascia and coping strips each having roof anchor portions securable
to the roof and skirts respectively integrally depending from said
portions; said strips being interconnectable together in superposed
relation by their skirts and relatively dimensioned to provide
spacing between the roof anchor portions for accommodating roof
material therebetween.
Other features of the invention more or less broad than the
foregoing will become apparent from the hereinafter following
description of the parts, principles and elements thereof given
herein solely by way of example with reference to the accompanying
drawings wherein like reference numerals refer to like parts
throughout the several views and wherein:
FIG. 1 is a perspective view of a pair of fascia and coping strips
comprising the instant trim, the strips being shown in superposed
relation prior to their interconnection together;
FIG. 2 is an end cross-sectional view of the trim of FIG. 1
assembled on a roof edge;
FIG. 3 is a perspective view similar to FIG. 1 showing part of an
alternative construction of trim adapted to accommodate a fascia
board;
FIG. 4 is an end cross-sectional view of the trim of FIG. 3
assembled on a roof edge and
FIG. 5 is an end cross-sectional view of another alternative
construction of the instant trim assembled on a roof edge.
The instant trim is intended for use on a roof of a building
structure and, as illustrated herein, the structure particularly
contemplated is one having a flat horizontal roof with a vertical
facade thereto.
In accordance with the principles of the present invention the
instant trim comprises an assembly of coping and fascia strips 10
and 12 respectively superposable relative to one another,
interconnectable together and anchorable on a roof to anchor roof
material in position upon the roof. Each said coping and fascia
strip comprises a roof anchor portion anchorable to the roof and a
skirt depending integrally therefrom which, in the embodiments
described and illustrated herein, depends over the edge of the roof
to overlie the facade of the building structure. In order to
provide accommodation for roof material between the respective roof
anchor portions, the coping and fascia strips are relatively
proportioned to provide spacing, when they are interconnected,
between the roof anchor portions thereof. The interconnection
between the two strips conveniently takes the form of a tongue and
stirrup interconnection conveniently provided at or adjacent to the
free edges of the skirts remote from their junctures with their
respective roof anchor portions.
A first embodiment of the instant trim will now be more
particularly described with respect to FIGS. 1 and 2 of the
drawings. As illustrated therein the trim comprising elongated
coping and fascia strips 10 and 12 respectively is located at the
peripheral edge of a flat roof to overlie the roof and the facade
of the structure adjacent the roof edge.
The actual building structure may of course be of any convenient
form and for the sake of convenience herein is illustrated as
including a vertical wall 14 with an uninsulated roof deck 16
thereon, said deck 16 being overlaid with a layer of roof material
18 covering the whole of the roof area and completed by a
peripheral edge strip-in 20. Such roof layer 18 and strip-in 20 may
both for example comprise roofing felt with a bituminous material
painted or poured thereon and top-dressed with gravel 22 in known
manner.
The said strips 10-12 comprise respective roof anchor portions
24-26 securable to the roof and respective skirts 28-30 depending
integrally therefrom which, in this embodiment, overlie the facade
of the wall 14. The strips 10-12 are superposed relative to one
another with the coping strip 10 having its roof anchor portion 24
and skirt 28 closely adjacent the roof and wall respectively and
being respectively overlaid by the roof anchor portion 26 and skirt
30 of the fascia strip 12. The roof anchor portions 24-26 and
skirts 28-30 are planar and extend continuously in the direction of
the length of the strip.
As hereinbefore mentioned the strips 10-12 are interconnected
together and this is conveniently accomplished at the edges of the
respective skirts 28-30 remote from their junctures with their
respective roof anchor portions 24-26. Such interconnection takes
the form of a tongue 32 and stirrup 34 and in the embodiment
illustrated herein such stirrup 34 is provided on the coping strip
skirt 28 while the tongue 32 is provided on the fascia strip skirt
30. The strips 10-12 are so relatively proportioned that, when the
tongue 32 is engaged within the stirrup 34 to interconnect the
strips as shown in FIG. 2, spacing is afforded between the roof
anchor portions 24-26 providing accommodation for the edge of roof
material, specifically herein the layer 18.
As will be appreciated the coping strip 10 is first applied to the
roof edge to overlie the roof deck 16 and wall 14 after which the
roof material 18 is located in position and the trim is completed
by the interconnection of the fascia strip 12 to the coping strip
10; the respective roof anchor portions 24-26 being secured to the
roof by suitable fasteners such as the screw 36 illustrated in FIG.
2. Such an assembly not only anchors the edges of the roof material
18 to the roof 16, thereby obviating wind lift-off, but also
provides a neat appearance to the facade of the wall 14 adjacent
the roof edge.
It will be seen that the fascia strip skirt 30 constitutes the
outer surface of the assembled trim overlying the wall facade and
is retained in position by the tongue and stirrup interconnection
32-34. That is to say, only the fasteners 36 may serve to hold and
secure the trim in position on the roof edge, the said
interconnection 32-34 serving to retain the fascia strip skirt 30
in position and restrain it against wind lift-off away from the
wall facade. However if the skirts 28-30 are of substantial width,
i.e., in excess of approximately 4 inches, it is deemed desirable
to positively secure the skirts to the wall 14 such as by
additional fasteners as illustrated herein in FIG. 2 by the screws
38. In such an arrangement the fascia strip skirt 30 conceals such
fasteners 38 from sight while at the same time maintaining an
uncluttered exterior appearance on the wall facade.
It will be observed from the FIGS. 1 and 2 illustrations that the
coping and fascia strips 10-12 are both contoured at the respective
junctures between their roof anchor portions 24-26 and skirts 28-30
to provide, on each strip, upstanding abutments 40 and 42
respectively which are in fact continuations of the skirts 28-30
beyond the respective planes of the roof anchor portions 24-26.
As has been mentioned hereinbefore the roof material 18 may be in
the form of a roofing felt over which a bituminous composition is
poured or painted to impregnate the felt therewith. The edges of
such a roofing felt would be applied over the roof anchor portion
24 of the coping strip 10 before the fascia strip 12 is
interconnected thereto and there is therefore a danger that the
poured or painted bituminous material, when applied to the roofing
felt, may splash or drip over the roof edge. Hence the coping strip
10 is provided with the abutment 40 locatable at the roof edge to
act as a dam preventing any accidental spillage of bitumen over the
said roof edge. Also of course after the roof has been completed,
prolonged exposure to the sun may at least partially liquify the
bituminous material on the roof causing it to tend to run and said
coping strip abutment 40 would also prevent any such running of
said material over the roof edge.
Similarly the abutment 42 on the fascia strip 12 will act to dam
any bitumen spillage which may tend to occur from the striping
layer 20. In addition however such fascia strip abutment 42 serves
as a gravel stop to prevent any gravel chips 22, which may become
loosened from their embedment within the bituminized roof material
18 or 20, from being dislodged over the roof edge. Furthermore such
fascia strip abutment 42 will act as a rainwater dam to prevent
rainwater from spilling over the roof edge and to retain it within
the confines of the roof for appropriate interior drainage.
It should be understood that the provision of a facing, i.e., the
skirts 28-30 of the instant trim, overlying the facade of the
building structure may serve several purposes, amongst these being
insulation and/or decoration of the facade. The embodiment
illustrated in FIGS. 1 and 2 primarily serves only as decoration to
give a neat uncluttered finish to the facade adjacent the roof edge
but it may also be adapted to deflect rainwater away from the
facade in an attempt to minimize water marking or staining thereof.
This effect is achieved in the present embodiment by providing a
projecting lip 44 on the fascia strip skirt 30 which, when the trim
is assembled in position, extends away from and downwardly of the
wall facade to deflect rainwater running down the exterior surface
of the skirt 30 away from the wall 14.
It will be appreciated that the instant trim may be formed of a
relatively thin metal and the formation of the rainwater deflector
lip 44 is therefore easily accomplished. Likewise the appropriate
contourings of the strips 10-12 to provide the aforesaid abutments
40 and 42 together with the provision of the stirrup 34
accommodating the tongue 32 of the interconnection between the
strips is equally easily accomplished by a suitable forming
operation.
Turning now to the alternative structure of trim as illustrated
herein in FIGS. 3 and 4, it will be observed that the coping and
fascia strips 10-12 are relatively proportioned not only to provide
accommodation for roof material but also to accommodate fascia
board 46 between the skirts 28-30.
As has been mentioned hereinbefore the skirts 28-30 which together
form a facing overlying the facade of the building structure may
contribute to insulation purposes as well as to decoration. The
embodiment of trim illustrated in FIGS. 3 and 4 is adapted to serve
this insulation purpose by the accommodation of the aforesaid
fascia board 46 which will function to insulate the wall adjacent
the roof edge.
The building structure illustrated in FIG. 4 is somewhat different
to that shown in FIG. 2 inasmuch that roof insulation board 48 is
superposed on the roof decking 16 before the roof material 18-20 is
applied thereto; said board 48 together with said roof material
18-20 having its edges accommodated by said trim and anchored to
the roof thereby in a similar manner to that hereinbefore described
with reference to the FIGS. 1 and 2 embodiment. The coping and
fascia strips 10-12 are again interconnected by means of a tongue
and stirrup interconnection 32-34 provided at the edges of the
respective skirts 28-30 remote from their junctures with the
respective roof anchor portions 24-26 but in this embodiment the
stirrup 34 of such interconnection is dimensioned to receive not
only the tongue 32 thereof but also to receive an appropriate
insulating fascia board 46 which is conveniently of the rectangular
cross-sectional form illustrated in FIGS. 3 and 4 and which may be
formed of the same material as the roof insulating board 48.
It will be appreciated that in this embodiment, the actual means of
securing the trim to the roof, and if required to the wall also,
may be the same as hereinbefore described with reference to the
FIGS. 1 and 2 embodiment. Similarly the respective abutments 40-42
of the coping and fascia strips 10-12 at the roof edge together
with the rainwater deflector 44 may also be of the same general
form as described with reference to FIGS. 1 and 2.
Turning now to the further alternative construction of trim
illustrated in FIG. 5 of the drawings, it will be observed that
whereas the coping strip 10 is of substantially the same form as
that illustrated in FIGS. 3 and 4, the fascia strip 12 is further
contoured between its skirt 30 and roof anchor portion 26 to
provide an inclined support 50 for the strip-in roof material 20
and function as an integral cant strip, as well as to function as a
rainwater dam and gravel stop as hereinbefore described.
Before discussing the specific structure of the FIG. 5 embodiment
in more detail, it should first of all be observed that the
building structure contemplated herein is similar to that
illustrated in the FIGS. 3 and 4 embodiment including a roof
decking 16 overlaid by insulating board 48 and completed by further
roof material in the form of one full layer 18 and a strip-in 22.
Furthermore the coping and fascia strips 10-12 are relatively
proportioned to accommodate the roof insulating board 48 and a
layer 18 of roof material therebetween and anchor them to the roof
as well as to accommodate insulating fascia board 46 between the
respective skirts 28-30 of the trim, said fascia board 46 being
received within the stirrup 34 of the tongue and stirrup
interconnection between the coping and fascia strips. Likewise the
actual means of securing the trim to the roof, and if required to
the wall also, may be the same as hereinbefore described with
respect to either of the two preceding embodiments and the
rainwater deflector lip 44 on the fascia strip skirt 30 may also be
the same as hereinbefore described.
It will be observed from FIG. 5 that the fascia strip 12 is
proportioned relative to the coping strip 10 to provide
accommodation between the two respective skirts for insulating
fascia board 46 which extends above the surface of the roof thereby
to provide an improved insulation to the roof in the vicinity of
the wall to roof joint. Such fascia strip 12 is contoured not only
to provide an abutment 42 at its upper edge to serve as a gravel
stop and dam as hereinbefore described but also to be inclined from
said abutment 42 to its roof anchor portion 26 to provide an
integral cant strip for the edge trim assembly.
Provision of insulating fascia extending above the roof top level
is not in itself new and in known constructions such a roof edge
assembly has generally been completed by the addition of a cant
strip of wedge-shape cross-sectional form to act as a filler
between the fascia and the top surface of the roof and functioning
also as support for a strip-in layer of roof material. However,
such known cant strips are generally formed of wood and in any
event have been separate from the fascia itself so that the instant
fascia strip 12 contemplated by the FIG. 5 embodiment provides
several advantages over the prior art inasmuch that it is an
integral part of the trim assembly while at the same time it
provides support for the strip-in layer 20 in known manner.
It may also be mentioned herein that certain problems of
pressurization may occur in such roof structures of the type
illustrated herein particularly in connection with the insulated
type of roof structure as shown in FIGS. 4 and 5. It is known for
example that it is a common property of building structures that
pressurization tends to build up under the roof decking and
subsequently within any roof insulation board which may be
superposed upon the decking. If no means are provided to relieve
such pressurization, the air pressure build up within the
insulation board will break out where it can, generally between the
upper surface of the insulation board and the layer of roofing
felt, thereby causing ridging or bubbling in said roofing felt with
a consequent tendency to run-off of the bituminous material with
which it is coated hence causing failure of the roof as a whole.
Furthermore, since said roof insulation boards are generally laid
side by side in abutting relation on the roof deck, relief of the
pressurization may tend to occur at such abutting joints causing
ridging in the roofing felt with attendant danger of complete
failure.
Venting of such pressurization within roof insulation board may
easily be accomplished in the trim of the present invention by
perforating the coping strip abutment 40 at positions adjacent the
edge of the roof insulation board 48 whereby the air pressure may
be vented to atmosphere between the coping strip skirt 28 and the
facade of the building structure. Such perforation is indicated by
the reference numeral 52 in FIGS. 3 and 4 of the drawings.
Alternatively, if no perforations are provided in the coping strip,
venting of the pressurization in the insulation board may be
accomplished between the abutting ends of adjacent coping strips
which are normally in lengths of approximately 10 feet secured in
edge to edge relation around the periphery of a roof edge.
A further known problem is that roof decking, particularly if it
includes concrete, is liable to have a high moisture content which
may tend to pass into any roof insulation board laid thereupon.
Since the roofing material laid over the roof insulation board is
of a bituminized felt material impervious to water, condensation
will tend to occur on the under surface of such roof layer with
consequent moisture saturation of the roof insulation board and
attendant failure of its insulating properties. It is therefore
desirable to insert a vapor barrier, which may conveniently be
polythene sheeting, to cover the entire under surface of the roof
insulation board above the roof decking substantially in the manner
shown by the sheet 54 in FIG. 5 of the drawings. Provision of such
a water impervious vapor barrier 54 thereby contains the moisture
within the roof decking 16 and prevents any moisture penetration
from reaching the roof insulating board 48. It will be appreciated
that in the provision of the vapor barrier 54 as shown in FIG. 5 it
will be necessary also to perforate such barrier, preferably at the
position where it lies between the edges of the roof insulation
board 48 and the coping strip abutment 40, to vent any
pressurization which may tend to build up in the insulation board
in the manner aforesaid.
Thus the instant trim comprised of two superposed strips offers
several advantages over known forms of edge trim as hereinbefore
mentioned and, since the instant trim is conveniently formed of
thin metal sections, which require no further finishing, complete
elimination of any wooden cant strips or fascias or soffits is
procured.
* * * * *