I need to add an extra 8 inches of attic insulation. I will be using the pink stuff - R30 Atticat Insulation. I plan on spraying it in by myself. A buddy will load the 'sprayer" from ground-level and I will be in the attic spraying it down over top the existing insulation which has thinned over time. Seems relatively easy, just messy, especially since I can using the existing insulation as a template.

Besides avoiding covering any venting and openings (entry, whole house fan) and electrical (I believe I have none except for bathroom vents) is there anything else I should consider?