Quote:
Originally Posted by 88911coupe
I thought I'd seen some rubber/foam pads that are specifically designed for long term auto storage. They are not flat, slightly curved, so tires not resting on a hard flat surface.
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If I understand the OP's question whether wood is preferable to concrete are we talking about only for stabilizing the humidity? I'm sorry I've been dealing with water intrusion and humidity control in homes and buildings for 40+ years and have never heard of such a thing.
Concrete sweats, sometimes with or without a vapor barrier. Concrete also hydrates for many years and in some cases becomes harder. Wood will absorb moisture and can retain that moisture for a long time. In many cases excess moisture will cause mold. I believe the National Plywood Assoc recommends less than 19% moisture. You can take a moisture meter with you to Home Depot and pick a random piece of plywood. Most likely it will show between 10% and 17% moisture content.
If you want to stabilize humidity I suggest you invest in a quality dehumidifier.
If you want to prevent flat spotting on tires I suggest you drive your car or invest in some mats that are designed for that specific purpose.