i had this at an old yard had the stables in a dropped floor barn..two stables but had to go through 1 outdoor door and then their own doors....just outside the 1st door would fill with water so quickly when it rained that it went into the stables, I tried putting extra shavings down in the bit inbewteen the two inside doors to stop excess water coming in...but found it to be very expensive so I moved yards as YO couldnt care less about it...grrr.