Plywood and other compressed wood siding products are an inexpensive way to sheath
outdoor buildings, sheds and other projects. T1-11, sometimes noted as T111 or T1,
is an example of one of many such wood siding products. The 'T' in T1 stands for
“textured,” which references the grooves or channels cut into the siding.
Wood siding is an excellent siding product when properly installed and maintained.
In fact, if you're diligent about keeping it painted or sealed to prevent weather
damage and rot, it can last you a lifetime.