User guide

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

Prevailing Wind Direction

Panel Rib

/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.