An Improved Asphalt Roofing for Buildings..
Year: 1898

page_text: Date of Application, 24th Aug., 1898'
Complete Specification Left, 27th Jan., 1899-Accepted, 4th Mar., 1899
An Improved Asphalt Roofing for Buildings..
I, JOHN MELL, Manager, 2, Kathleene Ville, Greencastle, co. Antrim, do hereby
declare the nature of this invention to be as follows:-
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This invention relates to an improved roofing wherein asphalt is used. Such roofing
is at present usually made by cementing three layers of sheet asphalt together.
Under this invention only two layers of sheet asphalt are used and there is intro-
duced between them an intermediate layer of woven jute impregnated with a solution
of pitch tar sulphur and Trinidad asphalt. The advantage of this layer of woven jute
is that it combines the three layers closely and effectively together and renders the
whole combination tougher and less brittle.
The roofing is made as follows:-
1st layer. Sheet asphalt.
2nd layer. Woven jute impregnated with pitch tar sulphur and Trinidad asphalt.
3rd layer. Sheet asphalt.
The third layer is covered with sand, etc., as usual.
The new combination makes a most effective and waterproof roof covering
I, JOHN MELL, Manager, of 2, Kathleene Ville, Greencastle, co. Antrim, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement :-
This invention relates to an improved roofing wherein asphalt is used. Such roofing
is at present usually made by cementing three layers of sheet asphalt together.
Under this invention only two layers of sheet asphalt are used and there is intro-
duced between them an intermediate layer of woven jute impregnated with a solution
of pitch, tar, sulphur, and Trinidad asphalt.
The advantage of this layer of woven jute is that it combines the three layers
closely and effectively together and renders the whole combination tougher and less
brittle.

page_text: The roof covering is applied in the following manner :-
The first layer which consists of sheet asphalt is nailed to the boarding. The
second layer, of impregnated jute, is stuck down to the first layer by means of a
special adhesive substance such as "Durable Vulcan cement "and the third layer, of
sheet asphalt, is stuck down to the second layer by an adhesive as before mentioned;
the entire roof surface is then painted over with the adhesive and then a layer of fine
sand and (or) gravel or like material is strewn over the adhesive surface.
The impregnating material employed in connection with this roofing consists of a
mixture of tar, pitch, Trinidad asphalt, and sulphur. These substances are placed in
a tank and heated for about 24 hours until they are thoroughly melted and combined
together. The proportions of the ingredients in the mixture vary in summer and
winter but they may be roughly taken at about :—
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I consider novel and desire to claim is :-
In asphalt roofing the combination of one or more layers of sheet asphalt and one g
or more layers of impregnated jute said layers being bound together by means of an
adhesive substance, substantially as herein before set forth.
H. D. FITZPATRICK,
110, Wellington Street, Glasgow, Agent.