The damage to my playmobil personally was not from cold -- it doesn't get cold enough here to make the attic cold. It stays warm from the heat rising from the ground level. The damage to mine was from the heat, but it was extreme heat. Our temperatures are frequently over 100 here, and the attic probably hits 150 degrees. It's hot enough up there to be in serious danger of passing out after just a few minutes, and hot enough that it destroys wooden furniture... warping and lifting the varnish off and loosening the glue on it. So it's extreme heat you need to look out for.