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| Topic: Thermal expansion | | Question | | What is the thermal expansion data for SignFoam? If direct tropical sunlight were to heat a darkly painted portion of my sign to 150 degrees F or higher, would my sign warp? | | Answer | Sign•Foam thermal expansion is roughly 10x’s that of aluminum so given enough heat you could expect to see some expansion, and conversely, contraction as it cools.
However there are physical properties that are particular to Sign•Foam. Assuming that the sign is well constructed, and properly mounted and that the thickness of material was proportionate to the overall dimension of the sign, you will find that the sign will remain quite stable. High Density Urethane is a tremendous insulator, so the heat that is generated on the surface of the sign does not penetrate to the interior. Therefore the majority of the foam remains a constant temperature and serves to hold the surface in place. If the foam is too thin and the heat transfers to the majority of the material, then you could expect some movement in the foam. However should this occur, you can rely on proper installation. If the sign is mounted with proper support, it will be impossible for the foam to generate enough energy to move against the hardware and supports.
Lastly we rely on our track record. Over the past fifteen years we have sold Sign•Foam worldwide. Signs have been constructed and remain in every climate imaginable. Sign•Foam has truly stood the test of time and as endured beyond our expectations.
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