Multiwall Polycarbonate & Acrylic sheet sheet should be mounted with
the ribs running downwards to assist in condensation water drainage.
Algae growth, in the form of a green deposit inside the sheet channels
will grow if the sheet is not prepared properly before installation.
Condensation inside the channels
due to particular temperature conditions, combined with dirt, algae
spores, and sun light will support algae growth. Steps to limit condensation
and prevent algae formation are discussed in more detail in section: Sealing
The tape delivered on Multiwall sheet is for protection only and
is not an impermeable sealing/installation tape. This tape should be
replaced prior to installation with a tape as described in section:
Sealing Techniques. Before installation, remove approximately 2 inches
of the masking from all sheet edges. Only remove the remaining masking
when the installation is complete.
Glazing with Multiwall PC sheet should be considered a finishing
operation and seen as the final step in the completion of an application.
One of the most important aspects of installations is edge sealing,
particularly the open-ended channels. Since moisture build-up and dust
contamination inside the channels can be a major problem. There are
several techniques that can be adopted to significantly reduce contamination,
the choice depending largely on the prevailing environmental conditions.
Basic Requirements Sealing Tapes are available from MJK Multiwall
The following guide-lines are recommended to minimize sealing and contamination