What is the amber-colored material on the surface of the insulation?
a. Glue used to bond the new sistered rafters to the old existing rafters (installed every other rafter).
b. Excrement from wood destroying insects that have infected the hemlock used to sister the existing douglas fir rafters.
c. Tree sap from green, low-quality lumber used to sister every other rafter.
d. Raccoon feces.