U.S. patent number 3,848,384 [Application Number 05/375,626] was granted by the patent office on 1974-11-19 for composition shingle.
This patent grant is currently assigned to Masonite Corporation. Invention is credited to James W. Eaton, Allan J. Luck.
United States Patent |
3,848,384 |
Eaton , et al. |
November 19, 1974 |
COMPOSITION SHINGLE
Abstract
A thick butt composition shingle system, each shingle comprising
a body having parallel upper and lower longitudinal edges and an
outer weather face, first narrow strip means along the lower edge
and disposed beneath the body of each shingle for securing the
lower edge of the shingle to a supporting roof or wall structure
and second narrow strip means along the upper edge of the body of
each shingle for abutting engagement with the first strip means on
the shingles in a next higher row, a tab member for each shingle
comprising a plurality of longitudinally spaced apart shingle tabs
integrally joined with an upper elongated strip portion and
defining open spaces between said tabs exposing portion of a
shingle base thereunder, said open spaces being defined by lower
edge segments of said elongated strip and opposite side edges of
adjacent tabs, each tab having a lower edge spaced from said edge
segment whereby said tab lower edges are aligned with said lower
edges of an underlying shingle base and said edge segments are
aligned with a lower edge of a shingle base in the next upper row
thus providing a double edge thick butt appearance for said
shingles laid in place.
Inventors: |
Eaton; James W. (Elgin, IL),
Luck; Allan J. (Marengo, IL) |
Assignee: |
Masonite Corporation (Chicago,
IL)
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Family
ID: |
26923280 |
Appl.
No.: |
05/375,626 |
Filed: |
July 2, 1973 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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229420 |
Feb 25, 1972 |
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Current U.S.
Class: |
52/420; 52/528;
52/540; 52/545; 52/559 |
Current CPC
Class: |
E04D
1/26 (20130101); E04D 2001/005 (20130101) |
Current International
Class: |
E04D
1/26 (20060101); E04D 1/00 (20060101); E04d
001/20 (); E04d 001/26 (); E04d 001/36 () |
Field of
Search: |
;52/420,542,543,545,540,551,554,555,559,528 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Sutherland; Henry C.
Attorney, Agent or Firm: Mason, Kolehmainen, Rathburn &
Wyss
Parent Case Text
This application is a continuation-in-part of co-pending U.S.
patent application Ser. No. 229,420, filed Feb. 25, 1972, and now
abandoned.
Claims
What is claimed as new and desired to be secured by Letters Patent
of the United States is:
1. A shingle system comprising at least one pair of shingles, each
shingle having a solid rectangular base of thin composition sheet
material with an undersurface and an opposite outer surface having
at least a portion thereof adapted for exposure to the weather,
said bases having parallel elongated upper and lower edges and a
first narrow strip along said lower edges secured beneath said
undersurface for use in securing the lower edges of said shingle
bases to the surface of a supporting roof or wall structure; said
shingles including a second narrow strip along said upper edge
secured above said outer surface of said base for abutting
engagement with a first strip of a shingle laid in an adjacent row;
each of said shingles including a tab member of thin composition
sheet material having an underside adapted to overlay the outer
surface of a shingle base and an opposite outer surface having at
least a portion adapted for exposure to the weather, each of said
tab members including an elongated strip comprising an upper edge
portion thereof and a plurality of longitudinally spaced apart
shingle tabs integral therewith extending downwardly from said
elongated strip defining alternate open spaces between said tabs
exposing the outer surface of an underlying base, said open spaces
of one tab member dimensioned to match the tabs of the other tab
member of said pair of shingles, each of said open spaces defined
by a lower edge segment of said elongated strip and a pair of
opposite side edges of adjacent tabs, each tab including a lower
edge spaced downwardly from said lower edge segments by a dimension
whereby said tab lower edges are aligned with said lower edge of an
underlying shingle base and the lower edge segments adjacent
thereto are aligned with the tab lower edges and the lower edge of
an underlying base in a next adjacent upper row of shingles, and
means for securing said elongated strips of said tab members
adjacent one of said first and second strips.
2. The single system of claim 1 wherein said tab members of each
shingle are secured to and overlie said base thereof and include a
tab adjacent one end extending outwardly beyond one end of said
base.
3. The shingle system of claim 1 wherein said first strip of each
shingle is hingedly secured to said base thereof and said second
strip is fixedly attached to said base thereof.
4. The shingle system of claim 3 wherein said first and second
strips on each shingle have longitudinal edge surfaces, each of
said edge surfaces adapted for abutting engagement with the edge
surfaces of said first and second strips of other shingles laid in
place in an adjacent row.
5. The shingle system of claim 3 wherein said tab member of each
shingle is pivotally interconnected with the base thereof and is
adapted to depend downwardly of the lower edge of the shingle base
to overlie the base of shingles in a next lower row.
6. The shingle system of claim 5 wherein said shingles include
adhesive patches on the underside of said tabs for sealing against
the outer surface of an underlying shingle base in a next lower
row.
7. The shingle system of claim 5 wherein said first strip and said
elongated strip of the tab member of each shingle are fixedly
secured together and said base thereof is hingedly attached to said
first strip for upward pivotal movement after said strips are
secured to a roof structure or the like.
Description
The present invention relates to a new and improved thick butt
composition shingle system used for weather proof covering used on
building roofs, wall surfaces and the like. In accordance with the
shingle system of the present invention the shingles are adapted to
be secured to a roof or wall structure along their upper and lower
edges and are highly resistant to wind forces which often tend to
lift and peel back shingles and tabs thereof causing breakage and
subsequent water leakage.
The popularity of thick butt natural cedar shakes and wood shingles
has resulted in several composition shingle manufacturers
attempting to provide asphalt or asbestos shingles which duplicate
the natural appearance of the thick butt, cedar shakes. In general
these attempts have utilized shingles formed with several laminated
layers, wherein the top or upper layers are cut out to provide
alternate random width shingle tabs and open spaces and multi-level
exposed layers with edges of relatively great thickness. These
shingles are considerably heavier and more expensive than
conventional, three-tab, single layer shingles and because of
weight and other factors require higher labor and installation
costs, in addition to the higher cost of the shingles
themselves.
Accordingly it is an object of the present invention to provide a
new and improved shingle system of the character described using
thick butt composition shingles.
Yet another object of the present invention is to provide a new and
improved thick butt composition shingle which is similar in
appearance to random width, hand split cedar shakes or thick butt
wood shingles but much lower in cost.
Another object of the present invention is to provide a new and
improved shingle of the character described which requires
considerably less material per unit area of surface covered than
prior art shingles.
Still another object of the present invention is to provide a new
and improved shingle of the character described which is
considerably lighter in weight per unit surface area covered than
prior art shingles of similar appearance.
An important object of the invention is to provide a new and
improved composition shingle of the character described wherein the
shingle is especially adapted to be positively fastened to a roof
or wall along both the upper and lower edges.
Yet another object of the present invention is to provide a new and
improved shingle of the character described which has a
considerably greater butt end thickness than prior art shingles and
thus prevents a deep or bolder shadow line appearance greatly
resembling actual wood shakes of relatively large butt
thickness.
Yet another object of the present invention is to provide a new and
improved thick butt composition shingle of the character described
wherein the fasteners used for securing the shingle in place on a
roof or the like are completely covered by a body of the shingles
and are hidden from view.
Still another object of the present invention is to provide a new
and improved shingle which may be easily and rapidly installed by
an unskilled roofer and which provides automatic horizontal
alignment of each row of shingles during application with
measuring, chalk lines or other guides.
The foregoing and other objects and advantages of the present
invention are accomplished by a new and improved shingle system
including at least one pair of shingles having a solid rectangular
base of composition sheet material with upper and lower edges and
an outer weather face. Each shingle includes first strip means
along the lower edge on the underside of the base adapted for use
in securing the lower edge of the shingle to a supporting structure
such as a roof or a wall. Second strip means is provided along the
upper edge of each shingle base for abutting engagement with the
lower strip of a shingle in a next adjacent row. Each shingle
includes a tab member comprising a plurality of longitudinally
spaced apart shingle tabs integrally joined to an upper elongated
strip and defining alternate open spaces between said tabs. Each
open space is defined a lower edge segment of said elongated strip
and a pair of opposite side walls of adjacent tabs. Each shingle
tab includes a lower edge spaced from the lower edge segments of
said tab member by a distance whereby the lower edges of said tabs
are aligned with the lower edge of an underlying shingle base to
give a thick butt appearance.
For a better understanding of the present invention reference
should be had to the following detailed description taken in
conjunction with the drawings, in which:
FIG. 1 is a perspective view illustrating new and improved shingle
system employing composition shingles constructed in accordance
with the features of the present invention and showing the shingles
as they are installed in place on a roof structure;
FIG. 2 is a top perspective plan view illustrating the shingle of
FIG. 1 before installation on a supporting structure;
FIG. 3 is a perspective view of the shingles of FIG. 1 indicating
in animated fashion a method of installing the shingles in a first
row along the eave or lower edge of a roof structure;
FIG. 4 is a perspective view similar to FIG. 3 illustrating the
shingle thereof after placement is completed;
FIG. 5 is an exploded plan view illustrating how the component
parts of a pair of shingles are cut from a rectangular piece of
sheet material in accordance with the present invention;
FIG. 6 is a perspective view of a bundle of shingles of FIG. 1;
FIG. 7 is a vertical sectional view through the fall line of a roof
structure showing another embodiment of new and improved shingle
system in accordance with the features of the present invention
installed on the roof;
FIG. 8 is a perspective view of yet another embodiment of shingle
system in accordance with the present invention and illustrating
the shingles thereof as laid in place on a supporting roof
structure;
FIG. 9 is a top perspective view of an individual shingle of the
system of FIG. 8;
FIG. 10 is a perspective view of the undersurface of the shingle of
FIG. 9;
FIG. 11 is an end elevational view of a bundle of shingles of FIG.
9;
FIG. 12 is a perspective view of still another embodiment of
shingle system constructed in accordance with the features of the
present invention and illustrating the shingles thereof as laid in
place on a supporting roof structure;
FIG. 13 is a perspective view of the underside of a shingle of the
system of FIG. 12 illustrating an individual shingle from the
underside of the tab member with the base in a folded position over
the tab member prior to installation;
FIG. 14 is a perspective view of the underside of the base of the
shingle of FIG. 13, and
FIG. 15 is an end elevational view of a bundle of shingles of FIG.
13.
Referring now to the drawings and particularly FIGS. 1-6, therein
is illustrated a new and improved shingle system comprising a
plurality of composition shingles for covering roof surfaces, side
walls and the like and constructed in accordance with the features
of the present invention. As best illustrated in FIG. 1, the system
includes a plurality of shingles 10 which are designed to closely
resemble in appearance, thick butt random width, wood shingles or
cedar shakes. The shingles 10 are preferably formed of thin
composition sheet material such as asphalt saturated felt covered
with granules on the outer weather face, or the shingles may be
formed of asbestos sheet material. Other composition, weather
resistant sheet materials of a synthetic nature may also be used
for the shingles 10 of the present invention.
Each shingle includes a rectangular base 12 having an outer weather
face (with or without granules embedded thereon when asphaltic felt
material is used) and a longitudinal, lower butt edge 14, a
parallel longitudinal upper edge 16, and a pair of opposite (left
and right hand) ends 18 and 20 perpendicular to the longitudinal
edges. The shingles are laid in vertically spaced rows in end to
end relation with the opposite end surfaces 18 and 20 of adjacent
shingles in close abutting contact against one another as
illustrated in FIGS. 1 and 3.
Along the lower longitudinal but edges 14 each shingle is provided
with a lower nailing strip 22 which is hingedly attached to the
rectangular base 12 on the back or underside thereof opposite the
outer weather face 14 as best shown in FIGS. 3 and 6. Preferably
the narrow strip 22 is attached to the body by means of an
elongated, longitudinally extending strip of thin, flexible tape 24
of material such as polyvinyl chloride film, asphalt impregnated
woven fabrics etc., which are strong, flexible and weather
resistant. Various materials for the hinge strip may be used, and
an asphalt impregnated cloth tape approximately 10 mils in
thickness and approximately 2 inches in width has proved highly
suitable. Preferably the hinge strip is adhesively attached over
its entire surface to the back or undersurface of the shingle base
12 and the nailing strip 22 with a suitable adhesive of weather
proof nature such as an asphaltic composition material used for
saturating the felt material forming the base of the shingle and
the narrow nailing strip.
In accordance with the present invention, the shingle 10 is similar
in appearance to random width, hand split cedar shakes or thick
butt wood shingles. The shingle is provided with a tab member 26
having a plurality of depending shingle tabs 28 spaced apart
longitudinally along the shingle base 12. The shingle tabs are of
random width and are separated by open spaces or slotted areas 30.
As illustrated in FIG. 5, each tab member 26 has an equal number of
tabs 28 and slots 30 so that a pair of tab members can be made from
a single strip of material having a width substantially less than
double that of each tab member. The tabs 28 on one tab member 26
are dimensioned to match the slots 30 in the adjacent tab member as
shown in FIG. 5 thus providing a substantial saving in material and
very little wastage. Each of the tabs 28 includes a lower butt edge
28a, aligned on a common butt edge plane of the shingles formed by
the lower butt edge 14 of an underlying shingle base 12. This
arrangement results in the shingles 10 having an extremely thick
butt edge appearance which closely resembles that of cedar shakes
or thick butt wood shingles. The upper edge portion of the tab
members 26 comprises a narrow, continuous, elongated strip integral
with the tabs 28 and the tab at one end (left hand end) of the
shingle is offset to overlap the corresponding edge 18 of the
shingle base 12 so that when the shingles are laid end to end in a
row, the joints between the edges 18 and 20 of adjacent shingle
bases 12 are covered by the tabs. This arrangement eliminates the
need for a double layer of shingles on the lower or eave row of
shingles because all of the edge joints are covered by tabs and
this of course results in a considerable saving in cost of material
and labor. Oftentimes with prior art shingles an additional or
double layer of shingles is required on the first row to insure a
water tight construction.
Along the upper edge portion of the tab member 26 there is provided
an upper, interlocking narrow alignment strip 32 which strip is
preferably adhesively secured along the longitudinal upper edge
portion of the tab member and shingle base 12. The upper strip 32
includes a lower edge face 32a which is adapted to abut against and
align an edge face 22a of the lower nailing strip 22 of the shingle
in the next adjacent upper row after the lower nailing strip is
hingedly folded under the shingle body so that the edge face 22a is
facing upwardly as shown in FIG. 3. When the hinge strip 22 is flat
and extends downwardly from the lower edge 14 of the shingle base
12 as illustrated in FIG. 2, the edge 22a faces outwardly. However,
when the shingle is to be installed as shown in FIG. 3 the face 22a
of the lower nailing strip 22 is facing upwardly and the shingle
base is pivoted as indicated by the arrow "B" as shingles are laid
up in place. After each shingle is laid in place, the opposite edge
22b of the lower nailing strip thereof is aligned flush with the
exposed lower butt edge 14 of the shingle base 12 providing a
double layer thickness of material and presenting a thick butt edge
as shown. The lower nailing strip 22 is of a width dimensioned so
that as each successive row of shingles is laid up in place as
described and shown in FIG. 3, the edge 22b of the strip is in
flush alignment with the upper edge segments 30a of the open spaces
or slots 30 between the shingle tabs 28 of the tab members 26 on
the shingles in the preceding lower row.
When the hinge lower nailing strip 22 of each new shingle 10 is
positioned with its edge 22a abutting against the edge 32a on the
upper strip 32 of a shingle in the preceding row, the edges 14 and
22b of the new shingle are automatically aligned with the upper
edge segments 30a of the slots 30 in the tab member 26 of the
shingle in the preceding row. As best shown in FIG. 1 the lower
butt edge segments 30a of the slots 30 in the tab member 26 are
aligned on a common plane with the faces 22b of lower nailing
strips 22 on the next adjacent higher row of shingles 10 and with
the lower butt edges 14 thereof and this provides a triple layer
thickness which enhances the thick butt appearance of the shingles.
In some regions a fourth layer of material is provided by the lower
edges 28a of the shingle tabs 28 and this further enhances the
thick butt appearance of the shingles 10 when they are laid up in
position on a roof structure as shown in FIG. 1.
The shingles 10 are easily and rapidly installed on a roof or wall
structure starting in a row along the lower edge of the structure.
The lower nailing strips 22 of the shingles 10 in a first row are
laid end to end and are nailed, tacked, stapled or otherwise
attached to the roof structure, for example with fasteners 34 as
shown in FIG. 3. After the fasteners in a nailing strip are driven,
each shingle is pivoted upwardly into place as shown by the arrow
"B." The left hand tab 28 of each shingle overlies the joint (line
"C") between the adjacent shingle bases in the row laid end to end
and because of this there is no need for an under layer of starter
shingles along the lower or starting edge of the roof or wall
structure. After the first row of shingles is in place, the next
row is laid up in a similar manner and the nailing strips 22 are
urged upwardly into contact against the downwardly facing edges 32a
of the upper strips 32 on the row of shingles already in place.
Contact between the edges 22a and 32a provides for parallel
self-aligned spacing of each row of new shingles with respect to
the shingles already in place. The amount of weather exposure of
each row of shingles is automatically established as the shingles
are laid up and measurements, guides or other means are not
required for insuring that the shingles are properly aligned and
parallel. The lower nailing strips 22 of each succeeding row of
shingles are nailed or attached with suitable fasteners 34 and each
new row of fasteners extends through the tab element 26, and the
shingle base 12 of the shingles of the preceding lower row of
shingles. Each shingle 10 is thus positively secured to the roof or
wall structure along both its upper and lower edges. This double
row of fastening for each shingle 10 reduces problems of wind lift,
shingle breakage and the resultant water leakage. The need for a
double layer of shingles on the first or eave row is eliminated and
because of the unique construction of the shingles the weight of
shingles per unit area of roofing covered is greatly reduced over
that of prior art, double layer thick butt shingles of similar
appearance.
Referring to FIG. 5, it will be seen that by dimensional matching
of the shingle tabs 28 of one tab member 26 with the open spaces or
slots 30 of another tab member, an economy of material is achieved
and as much as 37 percent less material is used than with many
prior art thick butt type composition shingles. This savings in
material results in a reduction in weight for a roof using the new
and improved shingles 10. FIG. 6 illustrates a bundle of the
shingles 10 as they are shipped and prior to installation in
accordance with the foregoing procedure.
Referring now to FIG. 7, therein is illustrated another embodiment
of a shingle system constructed in accordance with the features of
the present invention and referred to generally by the reference
numeral 110. As in the prior embodiment, the shingles 110 comprise
a rectangular base 112 having a lower butt edge 114 and a parallel,
longitudinal upper edge 116. The components or elements of the
shingles 110 which are similar or identical in function or
structure to those in prior embodiment will be given similar
reference numerals with the prefix 1 added and only the differences
in the embodiments will be described herein in detail.
The shingles 110 include lower strips 122 which, in contrast to the
prior embodiment, are not hingedly attached to the lower material
edge of the rectangular shingle base 112 but instead are fixedly
secured to the underside of the body along the lower butt edge. The
strips 122 have a lower butt edge 122b aligned with the butt edge
114 of the base and an upper, interlocking edge 122a which slopes
in a direction toward the edge 116 of the shingle base and
downwardly away from the underside thereof at an acute angle. The
shingle 110 also includes an upper nailing strip 132 secured along
the upper edge of the shingle body on the outer face and having an
interlocking face 132a adapted to engage and interlock against the
edge face 122a on the shingles in the next higher row.
As indicated in FIG. 7 the starter or first row of shingles 110 on
the roof structure is secured to the roof structure by means of a
separate nailing strip 132 and the shingles have their lower edge
strips 122 interlocked therewith and engaging the downwardly facing
edge 132a of the separate, starter nailing strip. After each
shingle in the first row is interlocked with the starter nailing
strip 132, the upper edges of the shingles are nailed in place with
the nails 134 extended through the upper strips 132 on the shingle
bodies. The second and successive rows of shingles 110 are then
interlocked in place and nailed up in a similar manner row by row.
The shingles 110 are almost identical in appearance to the shingles
10 previously described and similarly are secured to the roof or
wall structure along both their upper and their lower edges. The
interlocking action between the faces 132a and 122a of the strips
on the shingles in adjacent rows provides for automatic parallel
alignment of succeeding rows as they are installed and, as in the
prior embodiment, only one row of nails is needed for securing both
the lower edge of one row of shingles and the upper edge of the
lower row of shingles to the supporting roof or wall structure.
Referring now to FIGS. 8-11, therein is illustrated another
embodiment of a shingle system in accordance with the present
invention comprising a plurality of shingles 210. Components of the
shingles 210 having similar or identical counterparts in the
previous embodiments of shingles 10 and 110 will be given the same
reference numbers with the added prefix 2 and only the differences
will be described herein in detail.
Each shingle 210 includes a rectangular base 212 having a lower
butt edge 214, and upper longitudinal edge 216 and transverse
opposite side edges 218 and 220. A tab member 226 including a
plurality of individual shingle tabs 228 spaced alternately between
open spaces or slots 230 and integrally depending from a narrow
strip portion 229 along the upper edge is secured to the underside
of the base 212 along the lower edge with a suitable adhesive. The
narrow strip portion 229 of the tab member 226 has a plurality of
downwardly facing lower edge segments 230a between the tabs 228
which have lower butt edges 228a. The edges 228a and segments 230a
are spaced apart by a dimension which is set up so that when the
shingles 210 are laid in place row by row as shown in FIG. 8, the
aligned edge segments 230a and lower butt edge 214 of each shingle
is aligned with the tab butt edges 228a of the shingles in the next
higher row. The upper strip portion 229 of each tab member 226
includes an upper edge 229a (FIG. 10) which is adapted to abut
against the lower edges 232a of the upper strips 232 on the
shingles to insure the proper amount of shingle exposure to weather
and to facilitate installation of the rows of shingles by an
unskilled craftsman. As shown in FIG. 10 the back surface of the
tabs 228 are provided with patches of adhesive material 231 to seal
the tabs against the outer face of the bases 212 of the shingles of
the next lower row when laid in place. This tab sealing arrangement
prevents wind or other forces from readily peeling back the
tabs.
The lower or first row of shingles 210 is installed on a roof
structure with the tab members 226 removed therefrom and the lower
butt edge 214 of the shingles aligned along the eave trough.
Succeeding rows are then installed as described and the tabs 228
are spaced to cover the joints between adjacent shingle bases 212
in the preceding row so that a double layer of shingles on the
initial row is not required.
Nailing position marks 235 are provided along the lower edge
portion of the shingle bases 212 so that roofing nails 234 or other
fasteners can be used to secure the shingles in place on a roof
structure. The marks are spaced so that the nails will pass through
the upper strip portions 229 of the shingle tab member 228 and
through the base 212 of the shingles in the preceding row at a
point below the upper strip 232 thereof. Thus the shingle bases are
secured along both upper and lower edge portions and the nail marks
235 are positioned so that the tabs 228 on the shingles in the next
succeeding row will cover the nail heads. FIG. 11 illustrates a
bundle of the shingles 210 arranged in nested form for compact size
and ready for installation after removal of the outer covering of
the package for the bundle.
Referring now to FIGS. 12-15, therein is illustrated another
embodiment of a shingle system in accordance with the features of
the present invention and comprising a plurality of shingles 310.
Components of the shingles 310 having counterparts similar or
identical to those of prior described embodiments will be given
similar reference numbers with the added prefix 3 and only the
differences between the embodiments will be discussed in detail
herein.
The shingles 310 include a rectangular base 312 having a lower butt
edge 314, an upper longitudinal edge 316 and opposite transverse
side edges 318 and 320. Along an upper edge portion of the base
there is provided an upper longitudinal strip 332 having a lower
edge 332a and secured to the outer surface of the base. Along the
lower butt edge 314 there is provided a lower narrow strip member
322 having an edge face 322a and hingedly attached to the base 12
by means of a hinge member such as a tape or adhesive webbing 324.
When the shingle is in folded position as shown in FIGS. 13, 14 and
15 the edges 314 and 322a abut one another and upon installation on
a roof structure these faces are aligned on a common plane (as best
shown in FIG. 12) wherein a double thickness layer provides a thick
butt appearance as the base 312 is folded upwardly during
installation. In addition to the adhesive patches 331 provided on
the back side of the tabs 328, the shingle 310 is provided with a
pair of parallel sealing strips 333 on the underside of the base
312. The shingles 310 are laid in place row by row with the edges
332a and upper edges 329a of the tab member strip sections 329 in
abutment to provide parallel alignment. The base 312 is folded
upwardly after nailing of the strip 322 with nails (not shown)
which are hidden by the base in folded position. The shingle 310
provides a maximum of four layers of thickness in some areas and
provides a thick butt appearance somewhat bolder than the prior
embodiment.
From the foregoing it will be seen that the new and improved
shingles of the present invention have an appearance similar to
typical thick butt, cedar shakes. In addition, the shingles of the
invention are lower in weight per foot of surface coverage than
comparatively appearing shingles. The shingles are adapted to be
positively secured to the support structure along both their upper
and their lower edges thus preventing wind lift and other problems
of prior art tab shingles. In addition the shingles 10 and 110 are
self-aligning and do not require measuring or other guides for use
of the roofer when installing them. The shingles are relatively
light in weight when compared to similar appearing shingles and
require considerably less material. Another important advantage is
that the shingles of the present invention do not require a double
layer of shingles along the starting or lower edge row.
Although the present invention has been described with reference to
several embodiments thereof, it should be understood that numerous
other modifications and embodiments can be devised by those skilled
in the art that will fall within the spirit and scope of the
principles of this invention.
* * * * *