Note: Descriptions are shown in the official language in which they were submitted.
This invention relates to roofing, siding and the like and, more
particularly, to flexible, shingle simulating strip material for application
in horizontally extending interlocked courses.
There has long been a need in the art for an attractive, shingle
simulating strip material, which may be manufactured at relatively low cost,
which can be rolled up for shipment, and which can be quickly and easily
, applied by inexperienced labor by stapling or nailing to an underlying
substrate to provide a weatherproof covering. Although attempts have been
made over the years to provide such a material, they have all proved to be
v 10 deficient in one respect or another.
According to the present invention there is provided a first
i laminated strip material adapted to be laid in hori~ontally extending weather-
proof interlocked courses on a roof deck and secured thereto by concealed
, fastening means, said first laminated strip material comprising: a thin
f, underlying plastic base sheet of at least about 1 mil thickness; a self-
sealing asphalt mastic coating layer having a thickness of about 0.050-0.100
inches adhered to the front face only of said base sheet, the rear face of
said base sheet forming the rear face of said laminated strip material; a
mineral granule front surface layer having a thickness of about 0.030 to
0.050 inches adhered directly to said asphalt mastic coating layer, said
mineral granule layer forming the front face of said laminated sheet material;
said laminated strip material having on its front face a single longitudinally
extending groove adjacent to and spaced from one of its longitudinally
extending edges; and on its rear face a single longitudinally extending
groove adjacent to and spaced from the other of its longitudinally extending
edges, said grooves extending for a width at least about equal to the total
thickness of said strip material and for a depth of at least about one-half
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of the thickness of said strip material; whereby said first laminated strip
material is foldable along said grooves for 180 degrees around the edge of
a second adjacent strip of said laminated strip material without damaging said
laminated strip material, for 180 degree fold interlocking of the edges of
adjacent strips of said strip material to conceal said fastening means, with
said fastening means extending through said first strip material and into said
roof deck for securing the strip to the deck, said asphalt mastic sealing
material automatically sealing around the shanks of said fastening means and
preventing the passage of moisture through holes formed in said first
laminated strip material by the fastening means.
This material which can be applied by nailing will self seal around
the nail shanks. It may be applied so as to conceal the nail heads within
the interlocked edges of horizontally extending courses.
The strip material may be made of the exact width of a roof to be
`~ covered so to avoid end joints.
- The present material can be quickly and easily applied by in-
experienced labor by nailing it to a substrate to provide a weatherproof
covering of horizontally extending courses with interlocked edges and one
which is impervious to ice and wind damage problems.
The laminated strip material is preferably foldable along the grooves
at a temperature at least as low as 20 degrees F without damaging the
laminated strip material. The front face of the laminated material may have
a plurality of transversely extending shingle simulating appearance stripes.
In the accompanying drawings, which illustrate an exemplary
embodiment of the present invention:
Figure 1 is a plan view of the front face of a strip material;
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Figure 2 is a diagrammatic side cross-sectional view of the strip
material of Figure 1, taken on line 2-2 thereof;
~igure 3 is a diagrammatic side cross-sectional view of the strip
material of Figure 1, applied in several horizontally extending interlocked
courses; and
~- Figure 4 is an enlarged detail view of the interlocked and nailed
edges of adjacent strips.
Referring to the drawings, the novel laminated flat strip gener-
ally designated 10, has a thin, flexible underlying plastic film 12, a
self sealing asphalt mastic coating layer 14 adhered to the front face
only of film 12 and a mineral granule front surface layer 16 adhered
directly to the asphalt mastic coating layer 14. The rear face of fil~ 12
forms the rear face 18 of strip 10 and the front surface of mineral layer
16 forms the front face 20 of strip 10. On its front face 20, strip 10
- has a single longitudinally extending groove 22 adJacent to and spaced from
its longitudinally extending edge 24 and on its rear face 18, strip 10 has
a single longitudinally extending groove 26 adjacent to and equally spaced
from its other longitudinally extending edge 28. As hereinafter more
fully sxplained~ grooves 22 and 26 function as guide and hinge lines during
application of strips 10 in horizontally interlocked courses.
To enhance its shingle simulating appearance, strip 10 may have,
on its front face 20, a plurality of transversely extending shingle sim-
ulating appearance stripes 30, which preferably have random spacing.
; In order to provide a highly flexible strip 10 which can be rolled
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the edges of adjacently applied strips 10, it is important that film 12 be
highly flexibleg even at temperatures at least as low as 20 degrees Fo To
accomplish this, films of no more than between about 1 to 3 mils in thick-
ness must be used, preferably polyester films of 1 mil thickness, such as,
for example, DuPont "Mylar"; ICI "Melinex"; and Celanese "Celanar". How-
ever, other types of plastic films may be used, such as polyvinyl chloride
or flouride, polyethylene, polypropylene and cellophane.
The self sealing asphalt mastic coating layer 14 is applied to
~- film 12 in a thickness of about 0.050 to 0.100 inches by conventional
coating techniques. Its composition, by way of example, is as follows:
Range ~Preferred
#21 Asphalt 40-55% 46~
~18 Asphalt 35 5% 46%
Vistac "P~' 5-10% ~8%
~Softening point 200 F, application temperature 350 F.
The specifications of these components are as follows:
21 Asphalt Min. Std. Max.
S.P.~ F 128 130 132
Penetration 77F. 55 60 65
Flash Point~ VFo 550
S.P. Gr~;~60 F 100383
2. ~18 Asphalt Min. Std. Max.
S.P0 F 224 226 228
Penetration 77F. 15 16 17
Ductility 77VF.2.5
Flash Point, F.550
Sp. Gr. 60F 1.0277
3. Interstab Vistac "P" Modifier (Preferred)
Sp. Gr. o.895
Flash Point, COC~ Fo 375
Viscosity, CP 3475 + 30, Brookfield 120C.
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An alternative Modifier for the Interstab Vistac "P" is:
Exxon Butyl Rubber 268; Specifications -
Sp Gr. 0.92
Mooney Viscosity 125 C. 46 to 56
Molecular Wt. 450
The asphalt mastic sealing material is characterized by its self
sealing properties, in that it will automatically seal around the shanks
of staples or nails driven through it and so prevent the passage of mois-
ture through such holes in strip 10.
The mineral granule front surface layer 16 is embedded by pres-
` sure into the hot mastic asphalt coating layer 14 using conventional
techniques and so is adhered directly to it. The granule surfacing adds
Oa30t'-.050" to the asphalt coating film thicknessO It consists of arti-
ficially colored rock granules of the following sizes:
Preferred #11 Grading:
Min. Std. MaxO
~Retained on 8 mesh (.0937" opening) 0% 0% 0%
" (.0787" " ) 0 1 2
14 " (.0555" " ) 30 35 40
" (.0331" " ) 30 37 44
28 " (.0232" " ) 15 20 25
" (.01971' " ) 3 6 9
Pass 35 " (.0197" " ) 0 1 2
An alternate #9 Grading is as follows:
~Retained on 4 mesh ( 0187"~opening) 0% 0% 0%
6 " ( o132" " ) 0 0.5
8 " (.0937" " ) 19 22` 25
" (.0787" " ) 38 42 46
14 " (.0555~' " ) 23 27 31
" (.0331" " ) 5 7 9
28 " (.0232" " ) 0 ~1 2
Pass 28 " (.0232" " ) 0 0.5
~ ranule gradings are Tyler screen scale equivalent to United
States series designation.
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~n alternative material for granule surfacing is natural colored
slate granules of suitable size as specified above.
The granular front face 20 is preferably cold embossed to provide
the transverse appearance lines 30 better to simulate individual shingles.
~ The longitudinally extending grooves 22 and 26 are pressure in-
-~ dented by conventional techniques on the opposite faces of strip 10 adja-
f cent to and equally spaced from opposite ones of its longitudinally extend-
,~ ing edges 24, 28.
~, A typical strip 10 of the invention may be of total thickness
j 10 range of about 0.10 to 0.15 inch and about 8 inches in total width with
grooves 22~ 26 spaced about one inch from the edges 24, 28. Grooves 22 and
26 are preferably of a depth of about half of the thickness of strip 10
and are at least about equal in width to the total thickness of strip 10,
say about 0025 inches wide. During application, the grooves 22, 26 fun-
ction as guide and hinge lines to index the position of a freely manipulated
180 back fold along the edges at the time of application on the roof deck.
Referring now particularly to Figures 3 and 4~ strips 10 are shown
therein as applied to a wooden roof deck 32 by nails 3~.
The strip 10 of the first course is unrolled with the granule
; 20 front face 20 up, and positioned flat along the lower edge of roof deck 320
The lower edge of this starter course is nailed or stapled to the leading
edge of roof deck 320 The upper edge 24 of strip 10 is back-folded along
! groove 22 on its top face 20.
The strip 10 of the second course is unrolled film face 18 up
and laid directly on the first course strip 10. Upper edge 28 is inserted
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into the one inch wide slot formed by the backfold;'on upper edge 24 of the
first courseO The assembly is then nailed by nails 34 at about 12 inO
intervals, to roof deck 32 through the three thicknesses of stri~s~ lOo
The second course of strip 10 is then folded upwards along groove
26 and laid on roof deck 32 with the granular front surface 20 exposed
The second course of strip 10 is now ready to receive the third strip
10 which is handled in the same manner.
This application procedure is repeated for all subsequent courses
up the roof deck, providing a series of horizontally extending courses
with double 180 degree fold interlocking of their edges to conceal the
heads of nails 34 and provide a superior weatherproof roof coveringO
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