It is generally known to builders and roofers that the greatest amount
of wear upon all kinds of roofs is in the valleys or gutters. Therefore,
that part of the roof, whether covered with slate, tin or wood shingles,
should be of the best material, and free from the annoying possibility of
cracking.
This trouble is always caused by expansion and contraction of the metal.
The usual method is to make the valley of the desired length, and, after
shaping to the roof-boards, to nail each side firmly. The result is,
with the summer heat, a buckle is often formed at some point between
the two ends. In cold weather the buckle draws out, and in course of
time, if the joints in the middle do not give way, a leak will appear,
caused by the metal cracking. This will not occur with our roof valleys,
because we amply provide for the expansion and contraction of the same.
We particularly call the attention of dealers in building material to
our Queen Anne Valley. It is salable, durable and cheap, always ready to
apply; can be used by any workman capable of laying slate, tin or wood
shingles. (See page 23).