2) ROOFING FELT
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
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
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.
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.
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�
hips shall be laid to form �saddle� hips with copper step flashing
underneath. (Specify �Boston� or �Mitered� Hips if preferred.)
ridges shall be laid to form �saddle� ridges.
valleys shall be laid to form �open� valleys.
(7) ELASTIC CEMENT
Cement shall be an approved brand of waterproof elastic slaters� cement
colored to match as nearly as possible the general color of the slate.
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
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.
Rising & Nelson Slate
PO Box 336 2027 County Rt 23
Middle Granville, NY 12846