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SPECIFICATIONS
1) GENERAL
1. The General Conditions of the contract are hereby made a part of
the contract and the roofing contractor shall examine these General Conditions
and thoroughly acquaint himself with all the requirements therein contained.
2. This contractor shall furnish all materials and labor in
accordance with the drawings and these specifications.
3. This contractor shall inspect all surfaces prepared for slating
by other trades, point out to the proper authorities all defects, and shall not
proceed with the laying of the slate, felt or flashings until corrections have
been made.
4. Roofing shall be applied by workmen experienced in the applying
of slate.
5. The roofing contractor shall furnish his own scaffold or
rigging, or arrange with the general contractor for the use of scaffolds
furnished by others.
2) ROOFING FELT
1. On
all boarding to be covered with slate, furnish and lay asphalt saturated rag
felt, not less in weight than that commercially known as �30-lb.� felt. In
this weight, per 100 sq. ft., a tolerance of 1 lb. plus or minus will be
allowed.
2. Felt shall be laid in horizontal layers with joints
lapped toward eaves and at ends at least 2" and well secured along laps and
at end as necessary to properly hold the felt in place and protect the structure
until covered by the slate. All felt shall be preserved unbroken, tight and
whole.
3. The felt shall lap over all hips and ridges.
4. Ice and water shield may also be specified in additon to
the felt.
3) SLATE
Slate shall be of Genuine Vermont Colored Slate as provided
by Rising & Nelson Slate , Middle Granville, N.Y.
All slate shall be hard, dense, sound rock, machine punched
for two nails each. All exposed corners shall be practically full. No broken
corners on covered ends which sacrifice nailing strength on the laying of a
watertight roof will be allowed. No broken or cracked slates shall be used.
For Standard Thickness Roofing
Slate
1.
Slate shall be commercial standard thickness, Grade A, as furnished by Rising
& Nelson Slate Company.
2.
State whether one standard length or graduated lengths and random widths.
3.
State whether one color, or the percentage of each color required.
For Graduated Slate Roof
1.
Slate shall be Grade A as furnished by Rising & Nelson Slate Company,
machine punched for two holes, and varying in thickness from _______" at
eave to _______" at ridge; the percentage of each thickness to be
respectively _______. The thicknesses shall be intermingled in the various
courses, modulating from the heavier and thicker slates at the ridge, in such a
way and manner as will develop the best architectural effect. A detailed roof
layout for the application of the slate shall be furnished by the quarriers and
approved by the architect before material is fabricated.
2. All
slate shall be in standard random widths graduated in length from _______"
at eave to _______" at ridge, applied with standard 3" lap and
exposures. Add paragraphs (c) and (d) as listed under �Standard Thickness�
specifications.
(4) HIPS
1. All
hips shall be laid to form �saddle� hips with copper step flashing
underneath. (Specify �Boston� or �Mitered� Hips if preferred.)
(5) RIDGES
1. All
ridges shall be laid to form �saddle� ridges.
(6) VALLEYS
1. All
valleys shall be laid to form �open� valleys.
(7) ELASTIC CEMENT
1.
Cement shall be an approved brand of waterproof elastic slaters� cement
colored to match as nearly as possible the general color of the slate.
(8) NAILS
1. All
slate shall be fastened with two large-head slaters� solid copper nails.
Thicker slates require longer nails. Add 1" to twice the thickness of the
slate.
(9) SLATING
1. The
entire surface of all main and porch roofs, the roofs and sides of any dormer
window, if shown, and all other surfaces so indicated on the drawings, shall be
covered with slate in a proper and watertight manner.
2. The
slate shall project 2" at the eaves and 1" at all gable ends, and
shall be laid in horizontal courses with the standard 3" headlap, and each
course shall break joints with the preceding one. Slates at the eaves or cornice
line shall be doubled and canted by a wooden cant strip.
3.
Slates overlapping sheets metal work shall have the nails so placed as to avoid
puncturing the sheet metal. Exposed nails shall be permissible only in top
courses where unavoidable.
4.
Neatly fit slate around any pipes, ventilators, etc.
5.
Nails shall not be driven in so far as to produce a strain on the slate.
6.
Cover all exposed nailheads with elastic cement spread thickly over exposed
surface of undercourses of slate, nailed securely in place and pointed with
elastic cement.
7.
Build in and place all flashing pieces furnished by the sheet metal contractor
and co-operate with him in doing the work of the flashing.
8. On
completion all slate must be sound, whole and clean, and the roof shall be left
in every respect light and a neat example of workmanship.
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