Need to shim or provide capillary break between wood trusses and concrete block..
I am a builder in Chicago, building typical 3 unit spec condos, laying top chord engineered wood trusses on concrete block single wythe walls for each floor. An inspector recently mentioned we should provide a flashing membrane to be installed between the block and the wooden truss ends to keep water away from the wood, basically a truss shim. I cannot find any with a cursory search or much direction on this. Someone mentioned to just cut a piece of asphalt membrane and lay under each truss. We are flashing properly over the trusses to the outside, wondering if this is highly recommended or necessary? Thanks for any direction.