I already purchased enough insulation to insulate my garage ceiling in two layers. My roof is constructed with 2x4 trusses
16" on center.
I am starting to install 3 1/2" rolled insulation between the bottom truss cords which will get me level with the tops of the truss cords. Vapor barrior facing the inside of the garage.
My next step is to add the additional insulation without a vapor barrior on top of that. Normally I would place the second layer of insulation at right angles to the first layer. If I install the second insulation layer at right angles I will be bumping up against the truss webbing a lot of times and would end up cutting my insulation in quite a number of pieces.
Any suggestions would be appreciated