The east exterior side of my garage is sided with T1-11 and after, at least , 11 yrs, some of the paint is cracking and flaking. My original primer wa s oiled based and painted with Sears Weather Beater paint. Sears, here, n o longer has a painting department, so Weather Beater, etc. is no longer av ailable.
Spoke to Benjamin Moore specialist and he *recommended a water based primer , rather than oil based. Says WB is more flexible, hence there should be less cracking and flaking. I wasn't aware WB was more flexible, that way.
*Then followed by a latex paint.Info other T1-11 users, here, may find a consideration and/or beneficial.
Time for some fall maintenance, around here. All the facia needs repaintin g. The woodshop will have some ext. work done, also.
Sonny