This three story townhouse, built in 2007, had 7" fiberglass batts on the attic floor. The R value was approximately R18.
This old insulation was removed to provide a totally clean attic floor. This is done so the attic floor can be air sealed, a crucial step in preventing expensive loss of conditioned air into the attic. In addition, it was necessary to re-route the bathroom fans so they terminated properly on the roof, rather than in the attic.
Once all the prep work was thoroughly completed the crew blew in a 17" blanket of TruSoft™ Cellulose insulation, tripling the R-value for a cozy comfortable R60. Kudos crew! The homeowner was happy with the results.