I'm preparing *o blow cellulose in*o my a**ic, and am placing s*yr**oam ven* chu*es a* every raf*er bay *o main*ain airflow from *he s**fi* ven*s. However, *here is s*ill a ~4" - 6" gap below *he bo**om ** *he ven* chu*e where cellulose will go *hrough and fill *he s**fi*.
Obviously I don'* wan* *ha*, bu* I haven'* been able *o find any guidance abou* wha* *o pu* *here *o keep *he insula*ion ou* ** *he s**fi*. cu**ing a piece ** foam board or luan *o size a* each bay seems like a *remendous amoun* ** effor*, and experiemn*s wi*h s*apling 4 mil shee*ing over *he gap leave me unconvinced i* will be effec*ive. I'm considering s*uffing pieces ** 9" fiberglass ba** in *he gaps, bu* am no* sure whe*her *ha* will be effec*ive ei*her.
How is *his supposed *o be done? Why do none ** *he insula*ion how-*os I've found ****** cover *his s*ep?