I rented an insulation blower. Apparently it weights 150 lbs and I'm not sure if I can get it up into the attic.
Or, perhaps, are the hoses long enough to reach all edges of a 1000 sq ft attic without requiring the blower to be inside the attic?
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The blower doesn't go in the attic. The hose and the control cable do. If you took the blower up there you'd also have to carry the insulation up after it.
If you don't have enough hose, request an extension. Leave the blower in your truck or on your trailer unless you can't park near the door or window nearest the attic access point.
OK for the most part these do not go in attics, but can. As long as you have a pretty good attic opening you can fit these in there and I have had to in two story homes - or deal with a mess. In no way am I advocating putting these in attics as a norm but I have done it a couple times with no issues. There were pros/cons - on each that I did it there were other trades working for me in the house and even if there were cons it reduced the risk of me messing something up.
These weigh around 100 pounds. A bigger example is pictured below. The Attic Cat is really the biggest one I have used and I have done this more times than I can remember. But this is for sure a DIY opportunity.
Steps and tips:
I don't think the one I rented was that heavy, but it was not something I would want to carry up a ladder, nor would it have fit through the 20" attic access.
They are fast. I was able to pick up the unit, and with my stepson feeding the machine we did 1000 sq ft attic adding another foot of cellulose to the existing 6" of fiberglass in an afternoon.
Wear goggle type eye protection and a breathing filter espcially if you are using fiberglass, but even celluose is treated with borax as a fire/bug retardent, and probably shouldn't be breathed.
Before you start, put a cardboard or drywall skirt around the opening. Otherwise you get a face full of insulation every time you open the trap.
I used a couple of batts of fiberglass over the trap so that that area was insulated too.