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Shingle Application Instructions Crowne Slate
NOTE: SHINGLES MUST BE APPLIED PROPERLY. WE ASSUME NO RESPONSIBILITY FOR LEAKS OR DEFECTS
RESULTING FROM POOR APPLICATION OR FAILURE TO PROVIDE PROPER VENTILATION IN ACCORDANCE WITH
MINIMUM PROPERTY STANDARDS REQUIREMENTS. REVIEW ALL APPLICABLE BUILDING CODES, MINIMUM
PROPERTY STANDARDS AND REQUIREMENTS PRIOR TO APPLYING THESE SHINGLES USING THE APPLICATION
INSTRUCTIONS FOUND ON THIS WRAPPER. PLEASE USE CAUTION WHEN STACKING BUNDLES ON SLOPED ROOFS.
ROOF DECK: Must be smooth, firm, dry and securely nailed. Plywood must be exterior grade, conforming to building
code requirements. Half-inch plywood is recommended for best deck performance. The installation of asphalt shingles on
dimensional lumber (including shiplap/board decks) is not recommended as it may potentially cause buckling problems.
Buckling is not covered by our Limited Material Warranty. REROOFING: Split and re-nail curled or buckled shingles,
replace any missing shingles, remove loose or protruding nails, and sweep surface clean. Roof slope should be 4:12 or
steeper.
EAVE PROTECTION: Apply eave protection as per building code requirements, overhanging eaves by a nominal
1/4" (6 mm) and extending up the roof at least 24" (600 mm) beyond the interior wall line. Ice & Water Protector is
recommended for best performance, applied according to instructions printed on each package.
UNDERLAYMENT: For areas where the roof slope is 8" (200 mm) per foot down to 4" (100 mm) per foot, cover the the
deck with one ply an approved underlayment (or acceptable equivalent) laid parallel to the eaves, with 2" (50 mm)
horizontal laps and 4" (100 mm) end laps. Apply metal drip edges on top of any underlay along rake edges and directly
to the deck along eaves.
CHALK LINES: Sufficient chalk lines should be struck to ensure accurate vertical and horizontal alignment of shingles.
Vertical chalk lines every 4 to 5 shingle lengths are recommended.
FLASHINGS: Base flashing should be in place before shingles are applied. Cap flashings of sheet metal and base flashings
of metal or mineral surfaced roofing should be used at chimneys, skylights, vents, walls and other vertical surfaces and
sealed with asphalt plastic cement. Flashings shall conform to the requirements of applicable building codes and good
roofing practice.
NAILING: Use galvanized (zinc coated) roofing nails, 11 or 12 gauge, with at least 3/8" (9 mm) diameter heads, long
enough to penetrate through plywood or 3/4" (20 mm) into boards. Use 5 nails per shingle, placed as shown in the
diagram. Drive nails straight so that nail head is flush with, but not cutting into shingle surface.
To ensure coverage under the High Wind Application Limited Wind Resistance Warranty;
- the shingles must be installed with additional nails as above, and
- the shingles must have an opportunity to seal or be manually sealed as described above, and
- Starter strip shingles must be used at all eaves and rakes.
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Shingle Application Instructions Crowne Slate
NAILS
CEMENT
NAIL LINE
NAIL LINE
Optional
For optimal wind resistance, add a spot of
cement here at the time of installation.
NAILING ON STEEP SLOPES/HIGH WIND AREAS: For high wind
areas, or on slopes of 21" (533 mm) per foot (60°) or more, use
8 nails per shingle placed as shown below. Ensure that no nail is
within 2" (50 mm) of a joint of the underlying shingle. Seal down
each shingle at time of application with five 1" (25 mm) diameter
(approx. size and thickness of a quarter) spots of asphalt plastic
cement placed under the shingle 2" above the bottom edge of
the shingle. Apply plastic cement in moderation since excessive
amounts may cause blistering. CAUTION: Shingles should seal to
the underlying course when the factory applied asphalt sealant is
sufficiently warmed by the heat of direct sunlight. When application
conditions might limit the effectiveness of the sealing strip, such as
in cool weather or in areas subject to high winds or blowing dust,
shingle adherence should be ensured through manual sealing as
described above.
OPEN METAL VALLEY: (FIGURE 1) For longer roof performance,
metal valleys are recommended. Complete valley flashing before
shingles are applied. Center a 36" (900 mm) width strip of ICE &
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B
C
A
D
FIGURE 1
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Shingle Application Instructions Crowne Slate
WATER PROTECTOR (A) in the valley. Ensure flashing is tight
to the deck, then fasten with only enough nails to hold
in place, nailing at the edges only. Center a minimum 24"
(600 mm) wide, minimum 28 gauge pre-finished/galvanized
metal valley liner (B) in the valley, and fasten with only
enough nails to hold in place, nailing at the edges only. Snap
two chalk lines (C) the full length of the valley, 6" (150 mm)
apart at the top and increasing in width 1/8" per foot (3 mm
/ 300 mm) towards the bottom. When the shingles are being
applied, lay them over the valley flashing, trim the ends to
the chalk line, and cut a 2" (50 mm) triangle off the corner to
direct water into the valley (D). Embed the valley end of each
shingle into a 3" (75 mm) band of asphalt plastic cement (D),
and nail the shingles 2" (50 mm) back from the chalk line,
2 3/4" (70 mm) down from the top edge of the shingle.
FIGURE 2
2 1/2 TABS
2 TABS
1 1/2 TABS (B)
1 TAB
(A)
UNDERLAYMENT
4”
EAVE PROTECTION
PROTECTION D’AVANTTOIT
METAL
DRIP EDGE
SHINGLE APPLICATION (FIGURE 2)
Due to shingle design, it is recommended to begin application at the left side of the roof and work across the roof to
the right. This is a fully laminated two-layer shingle. Shingles should be laid flat (not bent) prior to installation to avoid
distortions and buckles.
STARTER COURSE: Prepare starter course shingles by cutting the tabs off a 3-tab shingle on a line level with the tops of
the cutouts (or use Leading Edge Plus shingles). Begin starter course with a full shingle. Install the starter course with the
factory applied sealant adjacent to the eaves overhanging the rake edges and eaves by a nominal 1/4" (6 mm) minimum.
FIRST COURSE: Starting from the left rake edge, trim 9" (108 mm) (one full tab) from the end of the shingle so that
the tab is flush with the rake edge (A). Apply the shingle flush with starter course at left rake edge and eaves. Nail as
described above and continue across the roof with full shingles, overlapping each shingle as you proceed.
SECOND COURSE: Start with a shingle from which one and one half tabs has been cut at the rake end (B). Apply with
lower edge of the shingle 10" (250 mm) above that of the first course. There are small shingle alignment slits at the sides
and in the top edge of the shingle to aid installation, but chalk lines should always be used to ensure proper offset.
THIRD & SUCCEEDING COURSES: Start the third course with a shingle from which two full tabs have been cut off. Cut off
an additional half a tab to start each succeeding course, aligning the lower edge of the shingle 10" (250 mm) above that
of the preceding course. At the fifth course, repeat the sequence of the first four courses. For maximum wind protection,
cement shingles at the rake edges.
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