We're using splined Homasote on a friend's LARGE home layout and have found that even after we glue up the splines, let them dry for weeks, then followed by a coat of paint before spiking the track down, that the homasote will STILL contract the following winter when the ambient air is very dry. This causes incredile "kinkage" in the track where we will have to go back and adjust/re-spike the track. After this "adjustment" the track is fine from then on out. We've been through two winters now and this cycle seems to be inevitable for all the new splined homasote that HASN't been through a winter....