Installation Instructions
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INSTALLATION GUIDE
Construction Details
DECK PREPARATION
Ross Roof Group products shall be applied to a solid or closely fitted deck. The sheathing must be
structurally sound and adequately fastened to resist wind loads.
Reroof over asphalt shingles: (Consult local building codes)
• Over existing asphalt shingles
• Meridian Panel can be installed over one layer of asphalt shingles if allowed by local code.
• One layer of underlayment is recommended for ease of installation.
• Start by removing hip and ridge caps for all hips and ridges
• Cut back the asphalt shingles around the perimeter to create room for the channels and so
the channels can fit flush against the fascia and barge rafters.
• Measure the eave to ridge measurements around the structure to make sure the eave and
ridge are square.
• New construction over solid sheathing
UNDERLAYMENT
• Minimum requirement is one layer minimum of ASTM D226 Type I or Type II; ASTM D 4869,
Type I, II, III or IV.
• Optional underlayments: ASTM D 1970 (self adhered membrane), and, or Synthetics.
• Eave line application is optional or could be required by local building codes.
• However, check local building codes to be sure the underlayments are approved.
SEALANT
Sealants shall be acceptable for exterior use and adhere to the materials to which they are
applied. The sealants shall be covered with matching stone granules where applicable. Ross
Roof Group Touch-Up Kit should be used on panel repairs for appropriate matching color/finish.
VENTILATION GUIDELINES
Roof ventilation is a requirement in most building municipalities. For the Ridge Vent system,
prepare for ridge venting by cutting both sides of the plywood 3/4” from the center of the ridge
or as specified by local building codes. See Panel Installation.
CUTTING PANELS
Panels can be cut with a cold cutting circular saw.
FASTENING REQUIREMENTS
• All fasteners are required in and/or thru decking min. ¾”.
• Minimum of corrosion resistant fasteners are required per panel. For TRS Components,
please refer to the roof detail section.
• Screws: Minimum requirement are galvanized or painted #12 x 1 ½” with a ¼” hex head
• Nails: Minimum requirement are galvanized 8D ringshank nails.
• High wind details (above (mph) V
ult
/ 93 (mph) V
ASD
, please refer to UL ER for
specific fastening requirements.
Detail Detail Area Product Recommened Fastener
# Fasteners/
Spacing/Pattern
1 Eave Treatment 902 Fascia Starter #12 x 1 ½” screws 6-8” OC
2 Rake / Gable / Barge 905 Barge Channel #12 x 1 ½” screws or 8d ringshank nails 12” OC
3A Hip Trim 400 #8 x 3/4" screws Both sides
#8 x ¾” screws
Fastening tab
B Hip 904 Hip under Channel
Trim 400
#12 x 1 ½” screws or 8d ringshank nails
#8 x ¾” screws
12” OC
#8 x ¾” screws
4 Valley Meridian #12 x 1 ½” screws or 8d ringshank nails 12” OC
5 Side Wall 904 Universal Channel
715 Side Flashing
#12 x 1 ½” screws or 8d ringshank nails
#10 x 1 ½” painted screws
12” OC
12” OC
6 Panel Meridian #12 x 1 ½” screws or ¾” screws or nails Min. 5 per panel
7 Short Course & Pitch Change 901 Short Course #12 x 1 ½” screws or 8d ringshank nails 10” OC
8 Headwall 715 Side Flashing #10 x 1 ½” painted screws
#12 x 1 ½” screws or 8d ringshank nails
12” OC
12” OC
9 Specialty: Skylights, Dormers,
Chimneys
904 Universal Channel
715 Side Flashing
901 Short Course
#12 x 1 ½” screws or 8d ringshank nails
#10 x 1 ½” painted screws
#12 x 1 ½” screws or 8d ringshank nails
12” OC
12” OC
10” OC
10 Roof Penetrations 907 Underpan #12 x 1 ½” screws or 8d ringshank nails 3 along top &
2 down both sides
A Ridge Shingle Trim 400 #12 x 1 ½” screws or 8d ringshank nails 1 in each fastening tab
2 per trim
B O Ridge Ventilation 907 Underpan #12 x 1 ½” screws or 8d ringshank nails 3 along top & 2 down
both sides
Ridge Ventilation Trim 400 #12 x 1 ½” screws 1 in each fastening tab
2 per trim
#8 x ¾” screws