Installation Instructions

BENDING OR BURYING SHEET
The flexibility of the sheet is sufficient to allow longitudinal curves, but flexing or
installing a sheet to the point of buckling can cause rapid deterioration in highly stressed
areas. For added strength and rodent control, sheets at ground level may be buried 4”
to 6” into the ground.
PAINTING
It is not recommended to paint CoverLite corrugated sheets. If paint is necessary, the
paints used should be compatible with polycarbonate. Polyurethane based paints are
usually recommended. Solvent-based paints should not be used. Paints should never
be removed with paint thinner as it is highly incompatible with polycarbonate.
FASTENING
Greca Corrugated sheets should be fastened at every second or third corrugation. MR 9”
and MR 12” should be fastened on the over lapping rib’s crest (please refer to attached
Coverlite Installation Guide for point fastening in the mid span of the MR panels
depending on corrugation). Sheet edges at ridge and gutter should always be fastened
at every second corrugation.
WALL FASTENING
The fasteners should be installed on the valley of the corrugation. The panels must be
attached to the horizontal members (purlins) for correct support. Purlins should be
spaced no more than 4’ apart.
ROOF FASTENING
Rafter spacing should coincide with sheet overlaps. A minimum roof pitch of 5
degrees is recommended in order to allow wind and rain to clean the sheets naturally.
Below 5% pitch may also result in the roof leaking (5% pitch = 88mm rise per lineal
meter, therefore a roof which is 3 meters long require a minimum 264mm rise). The
fasteners should be installed at the top of the corrugation. The panels must be attached
to the purlins for correct support. Purlins should be spaced no more than 4’ apart.
RIDGE/GUTTER
Sheet edges at ridge and gutter should always be fastened at each second corrugation.
Do not apply sealants between overlapping panels. Sealants are not required. Silicone
between sheets over laps could damage the sheet and would only result in unsightly dirt
streaks.
LAP FASTENERS
Install lap fasteners while panels are still on the ground. After marking off lap fastener