Curing Damp Walls.
Year: 1886

page_text: Date of Application, 31st Dec., 1886.
Complete Left, 17th Feb., 1887.
Complete Accepted, 18th Mar., 1837.
Major EDWARD CROZIER SIBBALD MOORE Royal Engineers Salisbury House Dover
Kent do hereby declare the nature of this invention to be as follows:--
The
Portland cement is applied to the inside of the building in a special manner.
Portland cement is laid on in two coatings, the first is pure cement inch thick &
the 2nd is mixed with sand 1 in 3, so as to exclude the damp; and condensation on
its surface is also prevented by a, further application of either Parian cement, Keen's
cement or ordinary Plaster.
E. C. S. MOORE,
Major R.E.
COMPLETE SPECIFICATION.
Curing Damp Walls.
I, EDWARD CROZIER SIBBALD MOORE of Salisbury House, Dover, in the county
of Kent, Major Royal Engineers, do hereby declare the nature of my invention for
"CURING DAMP WALLS" and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
Portland cement is used as the basis of the system and is to be applied to the inside
of the building, as a rule in two coats which are afterwards covered over with a third
coating of either Parian or Keen's cement, or if neither of the latter cements is
obtainable, the third coating may be formed of common hair mortar in the ordinary
manner. The first coating of pure cement is intended to exclude and prevent any
wet, no matter how porous the wall may be, from working through but as pure
cement induces condensation on its surface it is necessary to cover it up with a

page_text: substance which would not promote it-the third coating is designed with this object
in view the second coat forms a non conductor, and a connecting link, between
the 1st & 3rd coats.
The process is as follows:-
(1) Rake out the joints of the masonry carefully and render inch thick in pure
Portland cement, leaving a key on its surface.
(2.) Whilst still green, render the first coat over again with Portland cement, and.
washed sand, inch thick, in the proportion of 1 to 3, also leaving a good key on its
surface.
(3.) The last coating should now he hand floated and set, with either Parian or
Keen's cement.
As an alternative to the use of either of the latter cements, a coating of hair
mortar brought up to a surface with putty and plaster in the usual way may be
substituted.
The several coatings should follow each other as rapidly as possible so that they
may set together.
N.B. If it is of importance to finish the work still more rapidly, rendering, floating
and setting the walls with Parian or Keen's cement inch thick, may be substituted
for the 2nd & 3rd coats as already detailed but it would be more expensive.
There is no difficulty in application.
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 claim is:—
(1.) That this process of applying to the inside of a building three coats as
follows.
(1.) Pure Portland cement
(2.) Portland cement & sand
(3.) Parian or Keen's cement
with the alternative of hair mortar putty & plaster or two. coats in the following
order-
(1.) Pure cement
Parian or Keen's cement
in the manner already detailed is a cure for Damp Walls.
(2.) That houses, &c., may be built on this principle, using it in place of hollow
walls, thus effecting a saving in the cost of construction, and at the same time affording
a much more complete protection from damp, than is obtainable by the system of
hollow walls for the damp proof lining can be brought close up to the door, and
window frames, and tucked in round them; so as to effectually exclude the damp at
all points the only care required being to set all the masonry at the junction of
cross walls, with the outer walls, in cement; so as to preserve the cement envelope
intact.
(3.) When building a house on my system, compared with one built with hollow
walls; there is also either a small saving of roofing, and a corresponding reduction in
the lengths of the outer walls; or an increase in the area of the rooms is effected
without additional cost.
(4.) The process is capable of being used for the purpose of curing buildings which
are damp under every circumstance as the application is to the inside surface of the
walls consequently walls of buildings which act partly as retaining walls, casemates
which are covered with earth, &c., may be made quite dry by its means without the
expense of having to uncover them in order to stop the leaks.