PART 2
PRODUCTS
2.1
MATERIALS
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NOTE: Edit these paragraphs to meet project
requirements.
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2.1.1
Existing Slate
Intact and serviceable existing slate materials shall be salvaged and
reused whenever possible. New slate being incorporated into existing slate
roofs shall match existing as closely as possible. Slate from the same
quarry or manufacturer as the original shall be used if possible.
2.1.2
Slate
Slate shall conform to ASTM C 406. Slate shall be Grade A, (ASTM S1),
hard, dense rock, punched or drilled for two nails each. Cracked slate
shall not be used. Exposed corners shall be full. Broken corners on
covered ends which sacrifice nailing strength or the laying of a watertight
roof will not be allowed.
2.1.2.1
Standard Thickness Roofing Slate
Slate shall be [[smooth texture] [rough texture]] [5 to 6 mm 3/16 to 1/4
inch thickness] [all [_____] thickness] [[_____] and [_____] intermingled
thicknesses]. Slate shall be the following sizes: [[_____] by [_____]]
[graduated lengths] [and] [random widths].
2.1.2.2
Graduated Roof Slate
Slate shall be [[smooth texture] [rough texture]] and shall vary 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 in the lower courses of the roof to the thinner slates at
the ridge. Slate shall be in standard random widths graduated in length
from [_____] at eave to [_____] at ridge, and shall be applied with
standard 75 mm 3 inch lap and exposures.
2.1.2.3
Slate Colors
Slate shall be [unfading] [semi-weathering] slate. Color shall be [in
accordance with Section 09915 COLOR SCHEDULE] [_____].
2.1.3
Underlayment Membrane
An underlayment membrane shall be furnished on all surfaces to be covered
with slate. Membrane shall consist of [asphalt-saturated felt] [or] [high
strength composite self-adhering membrane].
2.1.3.1
Roofing Felt
Roofing felt shall be asphalt-saturated rag felt, Type II, No. 30 asphalt
felt in accordance with ASTM D 226.
SECTION 07310
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