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We have replaced foam core and Gatorboard with a superior foam board. This solves a large problem – warping due to changes in humidity. Gator is much better than foam core, but not perfect. Both have a styrene foam center. Foam core has a paper based outside liner. Gator has a wood pulp based liner. Both absorb moisture and warp when the humidity rises. Warping happens when the front, back, and foam center absorb moisture at different rates.
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Our foam board signs do not warp with changes in humidity because it has a styrene foam center and a styrene exterior. Neither absorb moisture. Foam board signs can also be shape cut.
