Mueller Pre-Fab - Manual (Page 54)

877-2-MUELLER E-8
fasTeneR InsTallaTIon
Correct fastener installation is one of the most critical steps when installing roof panels . Drive
the fastener in until it is tight and the washer is firmly seated . Do not overdrive fasteners: A slight
extrusion of neoprene around the washer is a good visual tightness check .
Always use the proper tool to install fasteners . A fastener driver (screw gun) with and RPM of
1700-2500 should be used for self-drilling screws . Discard worn sockets, these can cause the
fastener to wobble during installation .
sealant Tape
Proper sealant tape application is critical to the weather tightness of a building . Sealant tape
should not be stretched when installed . Apply only to clean, dry surfaces . Keep only enough
sealant tape on the roof that can be installed in a day . During warm weather, store sealant tape
in a cool dry place . During cold weather (below 60 degrees) sealant tape must be kept warm (60
degrees – 90 degrees) until application . After sealant tape has been applied, keep protective paper
in place until panel is ready to be installed .
Correct degree of
tightness . Note slight
circle of sealant
Too tight! Sealant
squeezed too thin .
Extrudes far beyond
fastener head
Too loose!
Sealant is not
compressed to
form seal
Lap Tek Screw
(20" O.C.)
Sealant Tape
Roof Panel
Roof Panel
Prevailing Wind Direction
Panel Rib
1 /
4
˝ Clearance Hole
noTe: always remove metal shavings from surface of panels at the end of each
work period. Rusting shavings can destroy the paint finish and void any warranty.