An insulation package contains a plurality of unfaced or faced, uncut and pre-cut fibrous insulation batts of a pre-selected width enveloped within a covering in a compressed condition. Each of the pre-cut fibrous insulation batts has a plurality of longitudinally extending batt sections separably joined to adjacent batt sections by separable connectors. The separable connectors hold the pre-cut fibrous insulation batt together for handling but can be separated along the lengths of the batt sections by hand to separate adjacent batt sections. Preferably, between 20% and 70% of the fibrous insulation batts in each of the insulation packages are pre-cut fibrous insulation batts.