Winter storage

[Vette73]

Originally Posted by Dynomite

Marty........I think the condensation under a ZR-1 has less to do with a vapor barrier and more to do with a very cold concrete floor that remains cool for a long time after the ambient temperatures have risen. The warmer air carries more moisture under the car where that air is rapidly cooled and moisture condenses on any surface available and in this case the undercarriage of the ZR-1. The MATS prevent that cold floor from cooling the warmer air under the ZR-1 and the condensation is prevented.

Any very cold unheated concrete floor will exhibit the same conditions. The higher the undercarriage is from the floor seems to reduce the condensation as shown in the photo below whereas a Toyota Tacoma does not suffer the same situation as it has about twice the undercarriage clearance as do the ZR-1s.

A moisture barrier will not stop a concrete floor from sweating. It will stop the mitigation of ground water through a slab if done correctly. Sweating is caused by a combination of concrete temperature and weather conditions. If the concrete is cold enough and the temperature and humidity high enough the slab will sweat, regardless of a barrier.

Where did you purchase those car mats for the concrete floor? Seems like a good idea...