when laying the bitumen sheets- always start from the bottom corner of the
roofing, on the opposite direction of prevailing winds. It must be parallel to the
eaves, moving up in steps towards the ridge (Illustration #1 )
OVERLAPPING
Side Lap : One corrugation
Head Lap: 15cm
FIXING THE SHEETS
Installed bitumen sheets are secured using zinc- plated nails -GUTTANIT
Two rows of nails are driven in, parallel to the diretion of the head up at the end
of each side of the sheets, always inserted fom the top of each corrugation. all
rows of nails are set up in every third corrugation- secured and sealed through
the top of the corrugation.
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