Feel the Heat

I don't know what the codes were regarding attic insulation when our house was built in 1973, but I find it hard to believe that the codes called for, um, ZERO insulation back then. Okay, our house doesn't have zero insulation in the attic, but it might as well. The attic has 35-year-old cellulose blow-in insulation in it that doesn't even cover the 2x4 rafters. So, on a good day we have something along the lines of R-5 insulation up there. For reference, current code calls for R-49 in the attic. Because of this, the heatpump has been working overtime all winter (and the previous 35 winters before that I'd assume...). When the heater turns off, you can literally feel the heat moving upward and being sucked out of the house.

Since we're still waiting for the new flooring to arrive, we're taking care of some final projects that need to be addressed in the meantime. One of those projects is insulating the attic.

After doing some research about insulation options, we decided to go with the Owens-Corning AttiCat system. This is the one that you can rent at Home Depot. We originally were going to go with insulation that is made from recycled newspaper treated with a fire retardant since it's "green" and earth friendly and all that crap. But, after comparing the two, the paper-based insulation would have been a couple hundred dollars more expensive and weighed about twice as much as the fiberglass-based insulation.

So, this morning we went down to Home Depot and bought 23 packages of the AttiCat insulation and rented the special machine to blow it into the house. This stuff is pretty cool and it's really easy to do. All you do is plug in the machine and drag the hose up into the attic and have your lovely assistant (Sarah) feed the bricks of insulation into the machine. The bricks expand about 16 times in size when fed through the machine and then it pumps it through the hose and all you have to do is "spray" the insulation into the attic.

This was the attic before we started adding the extra insulation. The gray stuff on the bottom is the old insulation that's covered in 35 years of dust. It's maybe 3 inches thick.


And after two hours of crawling in the attic blowing insulation around, it looked like this:


It's kinda hard to tell when you compare the before and after pictures, but there's 18-24 inches of insulation filling the entire attic now, giving it an R-value of 50-60 or so (MUUUCH better!). The results could be felt right away. It's amazing how much warmer the house feels now and the heat has kicked on a lot less than usual this evening.

Another great thing about this product is the mess was pretty minimal. After blowing 2000 cubic feet of insulation into the attic, this was the mess that had to be cleaned up. And most of this mess was because I accidentally dropped the hose when it was on and blew a bunch of insulation around the place.


We should have done this months ago!