Installation Instructions
Revised 2/2019 © 2019 Tarco All Rights Reserved. Printed in U.S.A.
Note
All statements, information and data given herein are believed to be accurate and reliable but are presented without guaranty, warranty or responsibility of any kind,
expressed or implied, except as may be indicated otherwise in this literature.
General Precautions
All roofing materials must be kept clean and free of
moisture prior to installation.
The roof deck must be clear of all debris and moisture
prior to installing the Fiberglass Mineral Surfaced roll
roofing
Fiberglass Mineral Surfaced roll roofing shall not be
installed when wet.
This product shall not be installed on slopes less than
2 inches per horizontal feet.
Ensure roof has positive drainage prior to installation.
Warm weather conditions are ideal for good adhesion.
Application should be made when ambient temperature
is 50°F or higher.
Follow Occupational Safety and Health Administration
(OSHA) safety standards; use common sense measures
and adequate precautions to prevent accidents.
Fiberglass Mineral Surfaced roll roofing must be installed
as per Tarco published installation guidelines. Follow
the National Roofing Contractors Association (NRCA)
roofing manual and relevant application guidelines from
the Asphalt Roofing Manufacturers Association (ARMA).
Local codes may supersede these instructions. Check
with the local building code administrator for specific
requirements.
Application
Unroll the Fiberglass Mineral Surfaced roll and allow it
to relax in direct sunlight.
Cut the roll into manageable lengths, typically 12 to 18
feet, before installation.
Install a full width roll in a horizontal manner such
that the edges are flush with eaves and rakes.
For nailable substrates, mechanically fasten
with approved roofing nails, driven by hand or
pneumatically, spaced 9 inches o. c. in the center of
the lap area, and two staggered rows fastened 18
inches o. c., 12 inches from each edge in the field of
the sheet.
Nails should be galvanized #11 or 12, a minimum of
1 inch long with 3/8 inch heads and long enough to
penetrate the deck.
All nails shall be covered. If any remain exposed,
cover them with asphalt roof cement.
Install the next course by overlapping a minimum of 2
inches on side laps and a minimum of 4 inches on end
laps, or as per applicable Building Code.
Stagger end laps a minimum of 3 feet on subsequent
courses.
Pay close attention to the laps because proper sealing
is critical.
All asphalt roofing cement is to be applied in thin,
smooth, even layers over the entire width of the laps.
To ensure product integrity, do not use excessive lap
cement as it will cause blistering of this product. Apply
lap cement conforming to ASTM D 3019 at the rate
specified by the coating manufacturer.
Press the lower edge of the upper course firmly into
the cement until a small bead appears along the edge
of the sheet.
Using a roller, apply uniform pressure over the entire
cement area.
Install flashings in cement before nailing in place.
For hot mop application, solidly mop the full width of
the sheet to be covered, including the lap, in roofing
asphalt. This can be accomplished by picking up the
roll at each end and at the outside edge, turning it
over, and setting it immediately onto hot mopping
asphalt.
Embed the roll in asphalt applied at the nominal rate
of 25 lb per 100 square feet.
Alternately, spot mop the deck with asphalt in 9-inch
diameter circles, 24 inches on center, in all directions.