So I got an Energy Smart loan (read more about that here), and on February 9th 2005, the contractors I picked showed up bright and early at 9am with 2 straight trucks and a crew of 5 guys.
They started by checking the attic and basement, then went outside and drilled baseball-sized holes on the exterior walls. That didn’t look good, but apparently it’s how they do things now so the hoses can really get up in to the walls and blow in the insulation. I haven’t counted how many holes they drilled in total, and will probably never really know if I did since they removed some of the vinyl siding to get to the wall then put it back, but there was a lot of drilling and a lot of holes around spots of the house that isn’t covered by siding.

The way insulation is blown in is kind of neat. They just shove the hose into the hole as deep as possible, then turn it on. The stuff gets shot in and when it can’t go in anymore, the machine basically stops. Then they pull it out a little bit and it auto-starts and blows until it stops. Repeat over and over until the hose is completely out of the hole. Then they plug it up with some wood circles and put spackle over them.
The last place the blew the insulation in was the back of the house. There is a little patio back there that someone obviously added on probably 100 years ago. Behind the shelves, there were none of those old little holes indicating insulation had ever been blown in. They drilled, and sure enough, completely empty.

Amazing. Not a damn thing. You could see the back of the wall from the next room and a wire or two. Speaking of wires, Ron, one of the guys, is a master with the drill. He says lots of younger guys just ram it through when they’re making those holes but they really don’t need to because the drill does the work and there is a chance a wire could be back there. If you look closely at the image, you can see a wire right behind the hole. That was close.

So they stuck the hose into the drilled and got that empty wall filled. That should save a lot of energy alone! It took about a half hour top to bottom (big wall) before it filled up and they plugged and spackled the holes.

Overall, it took two days to blow the new insulation into the walls of the house. They were doing other stuff too so I don’t have exact calculations, but they were here for a total of 14 hours over two days. I thought it would take longer to do the exterior insulation, let alone the attic, basement crawlspace and all the weatherstripping. So that was pretty quick. The guys (Ron, Steve, Jason, another Steve and about 3 others who’s names I didn’t catch) are very good at what they do.