How to Repair, Replace and Install T1-11 Siding
By Bob Haring
, last updated March 13, 2012
T1-11 siding comes in 4-by-8-foot sheets that are scribed to look like either vertical or horizontal planks. It has tongue and groove joints that resemble plank edges when fastened together. This was once a popular building material because it was cheap. T1-11 siding can be made out of plywood, oriented strand board, wood composite material or cement fiber. When properly installed and painted, T1-11 siding can be durable, but moisture and rot problems have been known to crop up with T1-11 made of wood composites, and these materials are not used much now.