So I'm finally getting my moisture levels in the subfloor in check. I've installed a fan system to exchange the air underneath the house. That seems to be working but now it is winter and I have like 30% humidity in the house. What installation tips can you guys give me for installing the flooring so that it doesn't buckle from swelling when August comes around? Do I just need to get several humidifiers throughout the house to raise the humidity?

Edit - My product is 5" pre-finished 3/4" nail down oak.

Any advice is greatly appreciated.

Thanks,

Jeff

Well, if your summer humidity levels are now under control at around 40-50 percent, then you should try to maintain this during the winter.
Humidity in the house is a result of using the shower, cooking, breathing, etc. This may not be sufficient (read: not bloody likely) so you may indeed need to add humidity to the air either with a built in and prperly maintained humidifier on your furnace, or by the use of portable units strategically placed throughout the home.
Back when I was a lad, we had boiler driven hot water heating circulating through radiators. Mom used to put pots of water on top of these and the heat from the rads would slowly evaporate the water.
Sufficient? who knows, but houses that didn't do this, the kids were always sick with colds and runny noses etc.
The key here is, the portable units are not self-sufficient. You must refill them on a reular basis.