US1959610A - Roofing - Google Patents

Description

May 22, 1934. J, H, BowMAN ROOFING Filed Dec.

INVENTOR wlmssses Patented May 22, 1934 1,959,619; ROOFING joseph H. Bowman, Pittsburgh, Pa., assignor to American Steel Bandv Company, Pittsburgh, Pa., a corporation of VNew Jersey Application-December 15, 1931, serial No. 581,11*!` 3 claims. (o1. 10S-1a) This invention relates to sheet-metal corrugated roofing, covered on one orVV both sides with protective members, such'as sheets of asbestos, paper, felt, or other like materials, herein referred to generically as fabrics.

Among the objects ofthe invention are to provide inroong or siding of the clas's'above referred to means whereby the fasteners for attaching the sheets to the structures are protected from weather exposure, while at the same time effectively sealing the joints of adjacent sheets. Other objects will be apparent to those familiar with this art.

In the application of roofing or siding, of corrugated sheets of metal, even though the sheets are covered with a waterproof coating, such as asbestos or felt impregnated with asphalting or the like, the protective coating has necessarily been broken by the passage therethrough of nails or bolts used for fastening the sheets to the building structure or fastening the meeting edges of the sheets to each other. Such openings are corrosion foci and result in leakage. Also, in the erection of corrugated roofs or sidings the customary manner is to overlap the adjacent sheets at their meeting sides or edges and ends. Such overlapping joints are at best only partially weather tight. Air and rain are frequently driven by wind pressure through the resultant gaps unless considerable overlaps at the edge and ends of the sheets are provided. Such wide overlaps are expensive, because of duplication of the material in such portions.

The present improvement obviates all these difficulties by providing an overlapping of the fabric coating of the sheet at all joints, adapted to be sealed down after the edge and end of the sheet have been nailed or bolted to the supporting structure or adjacent sheets, providing a cover for the bolts or nails.

Referring to the drawing, Fig. l is a perspective View of a corner of a roofing sheet embodying the improvements herein referred to, and particularly showing the free flap of overlying protecting `fabric as applied to the sheet before it has been built into a roof or siding; Fig. 2 is a perspective view looking down the side of a building, or roof, the protective flaps of one sheet being raised; Fig. 3 is an enlarged partial section on the line III-III of Fig. 2, with the flap in permanent position; Fig. 4 is an enlarged partial section on the line IV-IV of Fig. 2, the flap being closed; and Fig. 5 is an enlarged partial section on the line V-V of Fig. 2, also with the flap applied.

The invention is illustrated in the accompanying drawing as comprising corrugated metal7 sheets l, having an overlying coverof fabric 2, such as felt, asbestos, paper, or the like, affixed to the upper side o-f the Asheet by any suitable means, as, for example, melted asphaltum or 6g the like, but having a free flap 3 extending along one edge of the -sheet anda free flap-i extending along one'end of the sheet. The under side ofthe metal sheet 1 is protected by a coating of asphaltum or impregnated fabric 5,' affixed over 65 its entire surface. Perforations 6 are providedat the time of erection along the edges and ends of the sheets for the purpose of receiving screw bolts 7 for attaching the sheets to purlins 8. A

bracket 9, as illustrated in Fig. 5, may be used 7'0? to obviate the necessity of perforating the flanges of the purlins themselves, or standard clips well known in the art for fastening around the purlin, may be used.

The units of roofing embodying this invention to be used in covering a building will ordinarily be made up at a factory as shown in Fig. l. That is to say, the under sides of the metal sheets are completely covered with the protecting elements 5, and the upper sides thereof are covered with sheets of impregnated fabric 2, attached throughout the lgreater portion of the upper surface of the metal sheet, but unattached to the metal for a few inches adjacent one or both sides and one or both ends of the metal sheet. Along the edges and ends just mentioned the free fabric may extend beyond the metal for several inches, forming a flap adapted to overlap adjacent units to cover any fastenings therein. Consequently loose flaps of the covering fabric are provided on one edge and one end, which, when turned back, expose the perforations 6 along that end or ends so that bolts, clips, or nails may be passed through the metal beneath the flap to secure the metal sheets to the building structure, or to adjacent similar sheets.

After the attaching members have been thus positioned a suitable liquid adhesive, such as melted asphaltum, tar, or the like, is spread over the exposed portion of the outside of the metal 10() sheet, that is the portion underneath the iiaps, and over the adjoining surface of adjacent sheets, and the flaps 3 and 4 are pressed down into this adhesive so as to be firmly bound thereto, as will be obvious. asphaltum may also be spread over the flaps. The result is to completely protect all the bolts and bolt holes along the edges and ends and at the same time completely seal all the joints between adjacent rooiing elements. The result is a 110 Protective coatings of tar or building Wall'or roof which has all the metal of the roofing sheets completely protected against exterior exposure and which has all of the joints between sheets completely sealed against passage of air or water in any direction or under any an edge and an end of the metal sheet, along which edge and end the fabric is free from the metal sheet throughout an area sufficient to permit fastening members to be inserted through the sheetA Without puncturing the fabric, the fabric extending a material distance beyond the said edge and end of the sheet and being adapted to overlie and to be cemented to adjacent similar units forming a roof or Wall.

2. A structural unit for roong or siding of buildings, comprising a metal sheet having on its inner side a suitable protective coating throughout, and having its outer side covered by a layer of protective fabric permanently attached thereto throughout except for a narrow space along one side and one end of the metal sheet, said exposed edge and end of the metal sheet being perforated to receive fastening members, the free fabric extending over and beyond said exposed portions of the metal sheet and being adapted to overlap and be cemented to adjacent similar sheets whereby to form a weather tight seal and to cover the perforated Aportions of the sheets after they are assembled in a building structure.

3. 'In a roof or Wall construction, the combination of corrugated metal sheets, each sheet overlapping a similar sheet at one edge and being overlapped by a similar sheet at the other edge, each sheet overlapping a similar sheet at one end and being overlapped by similar sheets at the other end, and fastening means extending through overlapping sheets at the edges and ends thereof, the upper side of each metal sheet having a fabric cover cemented thereon, said cover extending beyond the metal sheet on one edge and one end and being unattached to the edge and end portions of the sheet through which the fastening members extend, such extension overlying the said fastening means at the sides and ends of the sheets and being cemented to the overlapped adjacent sheet.

JOSEPH H. BOWMAN.

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