US2305008A - Roofing composition - Google Patents

Description

Dec.A 15,A 1942.A Q HQWARD 2,305,008

ROOFINGColvIPosITIoN` Filed Deo. 11, 1940 IN VEN TOR.`

f//s ATTO Patented Dec. 15, 1942 `UNITED STATES PATENT OFFICE ROOFIN G COMPOSITION 'Orlie Howard, Gibson City, Ill.

Application December 11, 1940, Serial No. `369,547

(Cl. 10S-7) 6 Claims.

This invention relates to roofing construction and it is one of the principal objects of this invention to provide a roofing composition which will be simple in construction, highly eillcient in use and economical in manufacture.

It is another object of the present invention to provide a roofing construction with lap joints with the flanges of the roofing material reinforced by metal strips.

Another object of the invention is the provision of a roofing composition comprising units having flange portions provided with a light gauge metal strip embedded therein to reinforce the flange portion and rigidify the lap joints resulting from an interlocking relationship with the flange portions of adjoining units.

A further object of the present invention is the 4provision in roofing construction of flange portions which will interlock and overlap with like flange portions of adjacent units with the flange portions provided with metal strips adhered thereto to reinforce the crease lines at the flanges and rigidify the resulting lap joints provided by two interlocking units.

A still further object of the invention is to provide La dry lap joint in roofing construction which will provide a tight seal and assure against seepage of heavy rains and like weather elements.

It is a still further object of the invention to provide a roofing construction with lap joints having a relatively rigid reinforcing member formed therewith to provide a solid seam which will withstand the stresses of heavy winds to assure against any removal of the roong material by reason of wind pressure and the like.

Other objects of this invention will appear more .fully as the description proceeds in view `of the drawing in which:

Fig. 1 is a fragmentary perspective view of a roof covered with roofing composition embodying my present invention;

Fig. 2 is a fragmentary perspective view illustrating one form of roofing units with which my present invention is adapted to be associated;

Fig. 3 is a fragmentary perspective View of a joint resulting from the modified form of my construction, illustrated in Fig. 5, to enlarged scale.

Referring to the drawing, IU indicates a unit of roofing composition which is provided with flanges I I adapted to be bent back upon the unit along crease lines I2. Each of the units IIJ is adapted tointerlock with adjacent units as illustrated in Fig. 2 by folding the body flanges I I upon each other to provide a lap joint I3.

The preferred form of my invention is best illustrated in Figs. 3 and 4 wherein there is shown a body I4 of roofing material comprising two plys I5 and I6 of the conventional composition roofing material. At the flange portions II there is provided a light gauge metal strip I'I which is formed with a crease I2 corresponding to the crease I2 in the roofing material I4. This metal strip comprises two portions I 8 and I9 divided by the crease I2', each of which portions are equal in width so that the portion I8 will span the width of the flange II while the portion I9 will extend into the body I4 a distance substantially equal to the width of the flange II. This metal strip is embedded in the body I4 when the roofing material is manufactured and is so positioned with respect to the body as to form a part thereof.

Each of the portions I8 and I9 are provided with perforations 2li which are adapted to align with each other when the flange I I is bent back upon the body I4. When two adjacent units I0 are joined the flange portion II of each unit is adapted to t into the U-shaped lap provided by the flange II of the adjacent unit of the corresponding section of the body I4 thereof. This is best illustrated in Fig. 4 wherein the perforations 28 of each of the sections I8 and I9 of corresponding metal strips are shown in alignment to provide a passage for a fastening means 2! in the form of roofing nails or the like.

It is to be particularly pointed out that when the lap joint 22, illustrated in Fig. 4, is formed there is no cement or other adhesive coating ap-` plied to the interlocking flanges II and that by reason of the relative rigidity of the metal strip Il there is a uniform distribution of the binding effect provided by the head 2| of the nails 2| along the lap joint. This uniformity of bond results in a tight sea-m throughout the length of the lap joint 22 `to prevent the seepage of dampnessor water into and underneath the roofing units I0.

It is further pointed out that as seen in the cross sectional view, Fig. 4 the reinforcing effect resulting from the metal strip embedded along the adjoining edges of adjacent units, the binding force of the head 2|' of the nails is also distributed transversely of the joint 22 thereby assuring that the free end 23 of the joint will at all times be held in close proximity to the underlying roong unit I0 adjacent thefreto. By reason of the rigidifying effect that the metal strip has upon the lap joint the top fold terminating at the edge 23 is not pliable to the same extent as ordinary lap joints Without metal reinforcing and by reason thereof this upper extending fold terminating at 23 will not be readily moved by wind stress but rather will withstand the forces of winds against a lifting action at the lap joints.

In the modified form, illustrated in Figs. 5 andv 6, I have shown a body 25 comprising' a single layer of roofing material which khas adhered thereto a metal strip l1 identical to the strip illustrated in Figs. 3 and 4. This metal strip is adhered to and pressed into engagement with the roong material 25 so as to form a part thereof thus providing a finished product with a reinforced edge portion ready for appliance upon roofs to be covered. As seen in Fig. 6 this modifled form provides a lap joint 26 identical to that shown in Fig. 4 with the lexception that there is but a single layer of roofing composition adjacent each layer of metal reinforcing. The lap joint provided by this form has all the benets and attributes of the preferred form and like the'latter will provide a durable interlocking seal at the interconnecting joints of the adjoining units. v

lWhile I have illustrated and described the preferred form of construction for carryingY my invention into effect, this is capable of variation vand modification without departing from the said edge flanges being bent back upon the body f, E

in U shape with abutting edge flanges bent alternately under and over their respective body and interlocking with each other, means for fastening said edge flanges to a surface to be covered, the

combination with said edge portion of a metallic f sheet embedded in said body along said edge portions to reinforce the latter and to coact with the fastening means to provide a seal throughout the interlocked edges.

2. In lap joints for roofing material comprising a flexible surface sheet having an edge portion folded back upon itself to provide a U- shaped flange portion, one U shaped flange portion being formed above and the other below its respective surface sheet and with the edge portion of each sheet arranged in interlocking relation with a like edge portion on an adjacent sheet, a metallic sheet embedded in said flange portion and extending partially into said surface sheet to reinforce the fold aforesaid and to rigidify the interlocking edge portions when the latter are nailed down upon the surface covered.

3. In a rooilng composition, the provision of a plurality of base sheets having crease lines along their edges to form flange portions, metal strips bridging the crease lines and extending into the base sheet a distance substantially equal to the width of said flange portions, said flange portions being bent back upon their respective base sheets and arranged between the flange portion and body of an adjacent sheet to provide an interlocking relationship between the metal strips, said interlocking metal strips coacting to reinforce the connection between adjacent base sheets and affecting a uniform seal therebetween.

4. In a roofing composition, the provision of a plurality of base sheets each having crease lines along their edges to form flange portions, metal strips bridging the crease lines and extending into the base sheet a distance substantially equal to the Width of said flange portions, said flange portions being bent back upon their base sheets to form U shaped edges, the flange portion of each base sheet being disposed within the U shaped edge of the adjacent base sheet to interlock the metal strips thereof, said metal strips having perforations formed therein, and fastening means extending through said flange portions and perforations to afxrsaid roofing composition on a surface to be covered.

5. In a roofing composition, the provision of a plurality of base sheets having crease lines adjacent their edges to form flange portions, metal strips adhered to said base sheets and bridging d the crease lines and extending into the width of said flange portions, said flange portions and metal strips being bent back upon their respective base sheet along said creased line to provide U shaped edges, the U shaped edge of adjacent sheets being alternately above on one sheet and below on the other with the flange portion of the upper sheet disposed in the confines of the lower U shaped edge and the flange portion of the lower sheet disposed within the confines of the upper U shaped edge, headed fasteningmeans extending through said flange portions, said metal strips coacting with each other and said heated fastening means to provide a uniformly 'interlocked seal.

6. In a roof-lng composition comprising a base sheet formed to provide an interlocking lap joint with an adjacent base sheet, said lap joint including a flange portion on said base sheet, a metal strip lformed integrally with said base vsheet and extending over said flange portion and into the base sheet a distance equal to the width of said flange portion, said flange portion being bent back upon the base sheet and overlying the flange portion of an adjacent base o sheet, said adjacent base sheet being bent back` upon its flange portion to overlie said flange` portion of the underlying base sheet, said metal strips coacting with said flange portions to provide a ridged rib, perforations formed in said metal strips, said perforations of one metal strip aligning with the perforations of the adjoining metal strip, and fastening means arranged in aligned perforations for attaching said roofing composition to the surface covered.

ORLIE HOWARD.

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