The floors have a 4" to 1"fall on them from front to back ,two have 18mm rubber flooring in and one has floor tiles both are very easy to keep clean, you cant see but in the back ,there or built in kennals ,also made from blocks,never get damp,as it has a 3ft overhang ,any rain that does get in runs right out,built them 4 year ago still as good today have to say £1,500 was alot but worth it in the long run ATB N/S