Thanks for all the input guys. Also sorry Steve, rereading my last post it didn't come off sounding the way I intended.
@JohnK007: Its a small section. Sort of large if I'm thinking of how big a spot I could make by peeing on the carpet and letting it sit, but not big. Maybe a few feet one direction by a couple feet across. It just happens to sit along a seem where a number of panels come together, which annoys me, as they could have at least hit the middle of a panel and made it a little easier on me. I suppose if you are urinating on the floor of a house you are getting evicted from, you aren't really considering these matters though.
I'm not sure how to ensure I'm cutting along the joists, or where the joists are - where the nails run those are easy to spot, but every joist doesn't have nails going into it. I've got a studfinder, so I'll see if that has the depth to shoot through the OSB and let me know where they are. I'm a n00b, so also bad on terminology, so when you say nail cleats to the joists I'm not entirely clear on application. I'm picturing a 2x4 as the cleat, nailed so that it spans the joists and helps supports the panel I'm installing? Or maybe parrallel to the joist, to give room to nail the board down to, without overlapping the tongue of adjacent panels sitting on the joist. Sorry, I think I need an "explain like I'm five" version. I have no pride - I used a circular saw for the first time a few weeks ago, and used a table saw for the first time last night. I'm learning but have no experience.
@GeorgeC: OSB is the only thing on the floor, I expect. House was built in 2000 and I suspect the carpet I pulled out was original - it wasn't pretty, even ignoring the urine part.
Last edited by I.M.O.G.; 08-02-2013 at 01:22 PM.