Cupcake, For the 10x12 you use 4x5 mats and for the others you use 4x7 mats. Since you have concrete you have the best surface on which to install them. We use carpet knives and lots of blades.
One of our suppliers would do this is just 2 sections cut to fit.
We have been doing barn flooring or 20 yrs or so. We’ve shipped mats to a number of COTH folks. How can we help you?
Dave McAdoo
Tobruk Trailers
since 1984