Steve
Guru
On another forum someone suggested using the wooden lattice sets sold in 4'x8' sections at Lowes or HD. The wooden ones not the plastic as the wood pieces are laid in crossing pattern and will have spaces for better airflow. We have never had the problem on our boats but I think the wood lattice should work.
Shop Spruce Traditional Wood Lattice (Common: 0.5-in x 4-ft x 8-ft; Actual: 0.5-in x 48-in x 96-in) at Lowes.com
Shop Spruce Traditional Wood Lattice (Common: 0.5-in x 4-ft x 8-ft; Actual: 0.5-in x 48-in x 96-in) at Lowes.com