US1062400A

US1062400A - Waterproof roofing-sheet.

Info

Publication number: US1062400A
Authority: US
Inventors: Samuel C Irving
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-05-18
Filing date: 1910-05-18
Publication date: 1913-05-20
Anticipated expiration: 1930-05-20

Description

S. G. IRVING.

WATERPROOF ROOFING SHEET.

APPLIOATION FILED MAY 13, 1910.

1,062,400. Patented Ma '20, 191s.

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WITNESSES:

INVENTOR Y4 ATTORNEYS.

UNITED stra ns PATENT OFFICE.

SAMUEL G. IRVING, OF BERKELEY, CALIFORNIA.

WATERPROBI ROOFING-SHEET.

Specification of Letters Patent.

Application filed my 18, 1910. Serial No. 561,944..

To all whom it may concern v I Be it known that I,.SaMUnL C. IRVING, a citizen of the United States, residing at Berkeley, county ofAlameda, State of California, have invented certain. new and useful Improvements in Waterproof Roofing- Sheets, of which the following is a specification.

My improvement relates to waterproof conditions oftemperature. My improvedcompound roofing sheet is made in a diiferent way and so=thatthe resulting product does not contain any adhesive layer inits finished condition. In my improved roofing sheet, instead of cementing a layer of fibrous mineral materialto the foundation of the roofing, I embed fibrous mineral material in a coating applied'to the foundation and it is preferably further bound in by means of theapplication of acem'enting wash or plaster.-

In the accompanying drawing forming part of this specification, I have shown my invention in its preferred form and I will now proceed to describesuch form and .the

- preferred constituents and method'employed byme- Referring to such embodiment,

Figure'l represents a crosssect ion of a part of a compound roo I sheet :taken'on the line 1-1 of Fig. 2. {I -1g. 2 representsa roll of my improved compound roofing partly.

unrolled. Fig 3. .,is'a detail on an enlarged scale of aipam bf the edge of the roofing "sheet. .I ig. 1' is also'drawn onan enlarged scale for purposes of clearness, and it will be understood that accordingly; the section runs only part way across thewidth ofthe compound roofing sheet on the lines 1-1 of Fig. 2'. w i

Referring now to the roofing sheetiof thez drawlng and to my preferred method of manufacturing the same, and to the pro ferred constituents thereof, (.1) 'represents the foundation of my improved roofing material saturated with any suitable waterproofing composition as well understood in the art. prefer, however, to use a heavy sheet of felt for this purpose, and particu Patented May- 20, 1913.

sheet. It may be composed of any suitable larly one containing a large amount of fibrous mineral matter, such for example as asbestos. fiber, and composed partly of vege table or animal fibers. The manufactureof such a sheet of felt containing mineral mats ter and asbestos fiber is well known in the art and will, therefore, not be further-dc scribed. Any suitable waterproofing com position may be employed-as saturating material for the foundation such, forexample,

as a soft non-hardening compound contain ing resins, oils, fats, waxes,,-bitumens, tars, pitches, or their equivalents,eithersingly or e in combination. It is'to beunderstood, how-1 'ever, that this is not 'the only form of satulration that may-be employed, for any com pound which' will render the fabric. waterproof and pliable, may likewise be usedto advantage. In, practice, I find that gOQd sults are obtained with the use'of'commer' cial asphalt of azsemi-liquid consistency at room temperature, known to the trade as G grade;

(2) is a coating applied to. the underside of foundation (1), This coating compound isprefer-ably of a harder consistency than the impregnating material. It should beof a non-adhesiven'ature and ,may consist of one or morefof the, ingredients referred to in connection with the above mentioned-iris pregnatin-g compound; v1z. mater1als' of a resinous, fatty, :wa'xy, bituminous, tarry, or

pitchy nature. In practice, I have success fully used a medium :htlld asphalt, desig' nated commerciallyi as".C grade. '18 applied to the underside of a the foundation (1) while the foundation is in a heatedcon-j ditiogl, when the coating (2) in a molten condition is spread evenly'over thefouiida tion (1) by-mfeans of asteam heated roller,- or a series of such roller-so .-The substance of which this coatin is made is of such a nature that it wi not show any adhesive qualities under the ordinary conditions; of use. Accordingly there will be:..no tendency consistency of the roofing to adhere unduly to the sheathing boards on which the roofing may be laid.

(3) is a coating applied to the upper surface of the foundation (1). This coating is made of a substance which is non-adhesive at ordinary temperatures, but which is ada ed to become soft or tacky or adhesive at t e tem eratures ordinarily employed in the manu acture of my improved roofing sheet. In practice, I prefer to use a material harder than that used for the impregnating composition, and SH htly softer than that used foithe coating i2), although it may be composed of substantially the same ingredients. I have found that an asphalt of a aplproaching that known commercially as grade, may be used to advantage. Coating (3) thus made is hard, almost brittle at ordinary temperatures and will not exhibit any tackiness or adhesiveness under those conditions, but in the process of manufacture it is soft or adhesive sothat it can be spread on the surface of the felt and, will permanently adhere to the felt and it is thensufliciently soft so that fibrous or foliated mineralmatter may be embedded in the coating and be'permanently secured thereby when the coating cools. (4) represents a layer of such fibrous or foliated mineral matter embedded in the coating (3). Any. suitable mineral matter may be'used, but I prefer to use foliated muscovite or amphibole, or'chrysotileor mountainleat er. This mineral matter, or preferably the lower portion of the layer, is embedded in coating (3) while the latter is still soft. When this coating cools'and takes its permanent set, it

firmly grips the layer of mineral material mlxed with suitable binding agents and thinners. Any suitable cementing wash-or plaster maybe employed for the purpose. The one I prefer to use consists of 325 parts by weight of lime, 20 parts by weight of tallow, and'20 parts byweight of copper sulfate slaked with sufiicient water to make a plaster which may be applied with a trowel,

' or thinned still further so that it may be applied as a wash with an ordinary painter s brush. This cementing wash or plaster (5) after being applied is thoroughly flushed into all the interspacesexisting in the layer of fibrous material and smooths it down to an even surface and prevents the 3) and has notfibrous material from being rubbed or worn' example, when the sheet is nailed in place upon the roof. Before applying the wash or plaster an excess of fibrous or foliated mineral matter may be added to that of layer (4) and the cementing wash or plaster be then applied.

In practice it has been found best to limit the application of the foliated or fibrous material to those portions of thesheet which ultimately will be exposed to the weather and accordingly, those portions of'the sheet which, when laid, will underlie the superimposed edge of the adjoining sheet of roofing are left free of the fibrous I mineral material (4.) and the overlying cementing layer (5), asshown at- -(6)-: in Figs. 2 and 3. At (6) the upper exposed surface of the sheet is formed by the layer (3). This bare portion of the sheet is cemented .tothe underside of the edge of the adjoining superimposed sheet by means of any suitable cementing material, such as anyof the bituminous or asphaltic cement paints usually employed for such a purpose. Y The roofing, sheets are secured to the roofing boarding by nailing or in any other approved manner.

Color effects may be introduced in my improved product if desired. To accomplish such a result any suitable pigment may be mixed with the cementing wash or plaster. Of course, due regard should be paid to the permanency of the pigment employed under the influence of the weather and to its liability to, undergo undesirable chemical reaction when mixed with the wash or plaster. In practice, I have-found that certain ferric oxids,-such as Venetian red, natural Indian red, yellow ocher or umber, and chromic oxidsand graphites and pigments of a similar nature have proven desirable and suitable for producing color effects. 7 fibrous mineral matter may be colored by artificial means.

What'I claim as new and desire to secure by Letters Patent is:

1. A compound roofing sheet having a foundation saturated with a waterproof composition provided with a weatherproof coating, fibrous or foliated mineral matter If desired the foliated or partially embedded in said coating, and a cementing wash or plaster applied to the protruding portion of mineral matter.

2. A compound roofing sheet having a foundation saturated with a waterproof composition, one side coated with a non or foliated mineral matter partially embedded in said latter coating, and a cementing wash or plaster applied to the protrudmg portion of mineral matter.

3. A compound roofing sheet containing a foundationsaturated with a waterproofing composition, a waterproof. coating on both the lower and upper sides of the roofing sheet of a harder material than said waterproof composition for. the foundation, fibrous'or foliated .mineral matter partially embedded throughout all of the upper coating except along one edge thereof, and a cementingwash or plaster applied to the protruding fibrous or foliated mineral 15 matter.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

SAMUEL o. IRVING.

Witnesses:

JAMES MASON, C. L. BLACK.-