What is the recommended support spacing for installing Ondura?

A: The support spacing of 24” on center (o.c.) is recommended. In areas of heavy snow loads, spacing should be reduced to 18” or 12”. Do not use 16” on center spacing, as this will not align correctly with the ONDURA corrugations to give the panel support. Wherever extreme conditions are possible or buildings have an interior ceiling, solid decking with felt is recommended.