I will have to place my safe in our dank, humid garage. It will be bolted to the concrete and the company suggested 1/4" washers under the corners for air circulation , but I am not good with providing pry points. I see a suggestion of roofing felt in another thread, but no response pro or con. Opinions? Also, we have a habit of providing up to 4" behind furniture, but I don't want to make it easy to throw a chain or cable around the safe to drag it off. So, any issues with the safe against the wall? Maybe again with roofing felt? Or is it better to leave a space and build barriers to make lassoing difficult? I will have a storage cabinet overhead.