Store the wood outside. You won't be using it until next fall so stack it loosly and just leave it alone. If it rains on it, so what?
There is sometimes confusion about "dry" wood. The wood has moisture in it as it grows. That's what must leave the wood in order to burn properly. Some rain won't affect that process at all. Come September, you place a piece of plywood over the top of the wood. That's all you need to do. Not under a lean to or anything like that. Just let it sit all season by itself and you'll be ready to go nect season.

Any idea how long ash tree logs will last outdoors? I just had quite a few ash trees taken down, some with a 24 inch diameter trunk but most between 12 and 18 inches. I had the trees cut into 15' logs and stacked into a log pile. I probably won't have the time to get to them for at least a year to cut and split.

Any rough idea how long these trees logs will last and still be good for firewood?

Thanks

I worry about using sevin on something you are going to burn in your house....I wouldn't do it. We sometimes just bring in a few at a time and leave in the heated garage a couple of days when they are soaked thru....I don't like bugs!