Replacing plywood sheet siding?

Question

On three sides of our house we have plywood sheet siding, some of which we discovered has wood rot and we need to replace before re-painting the house.

We're having a hard time locating the right sheets - they are about 4 x 8 and 1/4" thick. Any information regarding this product would be greatly appreciated!

Answer 1

Is this T1-11 siding?  That's the stuff shown in the picture in the link below.  It's about a quarter or 3/8 inch thick, and has raised vertical panels that look rough-sawn, and usually a tongue and groove edge to it.

If that's it, ask for it by name at any lumber yard, and they should have it.  

Answer 2

there is a new product sold at most building supply stores, hardy panel it is far superior to plywood will not rot termite proff