Does T111 Need to Be Primed

The other downside of OSB T1-11 is you can’t stain this siding. It must be primed and painted, taking away one of the primary reasons homeowners choose to go with this particular siding material.

Should I prime my T1-11 before painting?

Prime the siding with a heavy acrylic primer. I’ve used XIM Peel Bond with great success. Because of its finish, painting T1-11 siding is rather tricky. Use a roller for large areas, and a brush to get into grooves, and tight spots.

Do you have to prime new siding before painting?

Brand new surfaces should always be coated with primer before being painted. This is because most bare surfaces feature pores and/or numerous imperfections that will result in uneven paint coverage and poor adhesion. By priming the surface ahead of time, the paint will have a smooth, receptive plane on which to rest.