28-13-011-Rev4 6/17
DRILL ROOF CHANNEL
All rivet holes can now be carefully drilled through. To avoid drilling into roof lining
a drill stop must be used. The roof skin is approx. 2-3 mm thick.
Ensure that a drilling angle perpendicular to the roof angle is maintained.
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Drill
Stop
REMOVE SWARF
Avoid pushing
swarf into the
newly drilled
holes by removing
swarf from roof
channel with a
Vacuum Cleaner.
Vacuum swarf
APPLY PROTECTIVE
SEALANTS
Stage 1
Liberally apply a Zinc Rich
Cold Galvanising Solution
to the inside surface and
surrounds of each drilled
hole. Allow solution to
become touch dry before
proceeding with Stage 2
(approx. 10 min depending
on product used).
Stage 2
Liberally apply a Mastic
Silicone Sealant to
the inside surface and
surrounds of each hole,
including the threaded
M8 mounting holes.
Stage 1
Apply liberally in
and around holes
Stage 2
Apply liberally in
and around holes
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