Yes, 8 x 10 not including overhang.
I am planning on bleaching and painting. i love the idea of the vinyl floor!
Our average lows in the winter are 10 to 20 F at night and about 30 to 40 F during the day. But occasionally we get an unexpected drop into the below 0 range a couple nights per winter. Is this too cold to do the bumpout nesting boxes?
We have similar winter temperatures and we did bump out boxes.
I used this building technique:
http://www.thegardencoop.com/blog/2011/03/10/external-nest-box-plans/
They work great.