Imperial Valley press., 1931-02-23
Slate Roofs Are
Durable, Colorful,
Weather Resistin g

y Tho architects Small
Tcusc Service Bureau of the
United States, Inc.
1-etzr- ocphism. That is q pom
6.,cus @ro~d II stands. though, for
important happenings. It indicates
rncrge and in geology the word Is
u-.C 10 designate the traaSforma-
Ron Of ono geological material into
another Thus we have limestone
changed into marble and granite
into sehist We have also clay
a-c,amorplosed first into shale and
afterwards into slate.
BY tic process OF nletamorphisn1,
through which the materials OF
which slate Is composed have gone.
= chrrstoline material is built up
which rcs Qualities CT Waterproof
0e-s. making it especially desirable
Ter roofs. The various minerals
rat enter into the composition Of
slate give it color.
We often deeinc c certain tone Of
--Cv as "slGte color yet colOrs Of
e-cto range all the way from red &c
purple. With shades Of blue, green,
atrE and yellow in between. Some
oe the units arc Veined with diff
zcront colors and all are tempered
.sr the hand of nature. They blend
5.tC each other when used together
ocme o. the units are mottled or
s-2r.egated. having two or more
4co.o-s. No imitation can possibly
Eivc Just the quality which these
possess.
Texture, Color. Fire Resistance
In addition there is texture. The
original clay is deoonposed from
granite o. other similar rocks and
i laid down in the beds of streams |
whore. after tens of thousands OF |
years, It Is pressed and transformed |
first into shale and afterward into |
slate. When this material is quar- |
ried it splits into layers or slabs, |
but it does not break in geometri- |
cally excat places. There are rough |
12zsses ard high and low points.
There are certain variations in
--ai1 which como from the way the
units are broken out. These add
texture TO the roof as no other ma
terial can.
When 10 these advantages is
added that Of high fire resistance.
slate becomes 4 valuable roof ma
JcTial indeed. In addition there
Is : superior quality of durability
These stones last for generations.
Ihey should always be accom-
panied n building b. materials of
czual weather resistance.
al Of tho metal work Of roofs
covered with slate should be of
copper, which also has great dura-
bility. A heavy course Of roofers'
feit laid directly under the slate is
a double assurance OF waterproof
ness. Condensation cannot cause
small, trying leaks.
English Roofs of Stone
In England, where stone roofs
are most common, they are often
o Tar more informal nature than
those 10 which wc have become ac-
custOm2d. The Englishman may
use heavy stones along the caves
nd lighter ones at the ridge, grad
lrg the thickness Of the units and
and the exposures rom caves to
ridge. Such a root is called q
graduated roof. It IS extremely
beautiful. They are used on many
OF the finest homes in this country.
But plain slate is
not. when the whole cost, first and I
last. is considered.
The covering 70 be used on . roof ?
ought to be thought of as one hav- :
inE qualities CT permanence. It
should nave durability at least as
great as fhct Of the walls which
Il protects. Slate is one of the
sound materials. It's durability is
Inuuestioned. Texture and color
make it beautiful. i is metamor-
1aCsed clay-nct such 4 ponderous
Tcrd after all. - Copyright 1929,
The Architects Small House Service
Bureau O. the United States, Inc.