I was telling my dad and Joe about this when my dad was in town helping me with tiling some of the bathrooms which you can see here and here. He told me that he had just helped my brother-in-law blow insulation into their new house, and he had blown insulation into his own house just last fall. The way he described it, it totally sounded a LOT cheaper than this fancy blanket and something that Joe and I could really do by ourselves in just a weekend. Now, that's my kind of project! :)
Dad thought that for about $300 we could add all of the insulation that we could possibly need and decrease our energy bills by 20% and best of all, it would make the whole house warmer and cozier in the upcoming chilly months. That's the part that really sold me. I'll admit right now, I hate being cold, and I'm pretty much cold all of the time. So anything I can do to increase the chances of me being warm, well, I'm all about that.
Yep, we have a giant tv antenna up there from some former owner.
This is what the attic looked like before we added more insulation. You might be thinking, "Katie, I see insulation up there." Yep, you're absolutely right, and here is where I'll get a little technical. Insulation is measured in something called the R-factor. It basically measures how awesome your insulation is at keeping the heat in your house during the winter and out during the summer. When a house is built, a contractor only has to put a R-factor of 19 into the house, but the recommended minimum for this climate is R-37 and the ideal is R-49. What? That's a pretty big difference.
So how did we do this? The first thing I did after getting verbal instructions from Dad was read this helpful article: Insulating Your Home. I then used the Lowe's Blown In Insulation Calculator to figure out what R-factor we already had and how much insulation we would need to get the R-factor we wanted. The final thing I did was to actually go to Home Depot and talk to the handy people there who talked me through the whole thing and helped me pick between the two insulation options and figure out exactly what I needed.
Joe and I compared the two types of blown in insulation and went with the slightly more expensive fiberglass option because it is supposed to be an overall better product and the machine that we used to blow it in was promised to fit in our cars meaning we wouldn't have to rent a truck.
Once we had chosen, we knew that to get our R-factor of 49 we needed to add almost 9 inches of insulation on top of the existing 8 already there. But, we learned that we couldn't just start blowing. Attics are built to breathe. I'm told it's a very important feature of attics. In order to breathe, they are built with something called a soffit. Soffits are basically the vents that are part of the floor of the attic where the roof and the house meet, and you shouldn't cover them up with insulation. In order to avoid this, I built a little 12 inch wall out of cardboard with a bend at 9 inches. Then we learned quickly to tape the cardboard wall into two long pieces for each edge before we took them up into the attic. Once we had the little wall up there, Joe carefully used boards laid across the attic joists to squeeze over to the edge and staple the cardboard to the 2x4's of the roof. This was absolutely the hardest part. He had to carefully maneuver through the attic right up to the littlest space and while lying down, staple the cardboard to the wood. It was hot and messy. I was also up there handing him anything he needed and making sure that he had enough light in the right spots.
Safety Notes: Make sure you wear a face mask around insulation. Wear safety googles. Wear long pants and long sleeves or you will itch like crazy. And please be careful moving around in the attic. I don't want to hear about anyone falling through a ceiling into the bathroom below. If you aren't careful and just step on what you think is the floor, you'll end up falling through.
There is the cardboard wall protecting the soffits. You can see how there is still a gap between the cardboard and the rafters. This is how the attic will breathe properly.
Now for the fun part! Once we had the cardboard in place, we were ready to blow the new insulation in on top of the old stuff. We waited until the next day so we didn't wear ourselves out completely. Sunday took about 3 hours from start to finish. We had to go to Home Depot in our two cars, buy the insulation and get the machine that blows it. This machine did come apart, and it did squeeze into the cars. It was a really tight fit though, so if you have access to a van or SUV, use that. By the time we loaded up the machine and 11 insulation packages, both of our cars were stuff to the gills.
We unloaded into the backyard and set the machine up. This machine takes a very compact tube of insulation and beats it apart and blows tiny pieces up the hose and into the attic. It says that it makes the one package of insulation expand 16 times its original size. We ran the hose up through a bedroom window and up into the attic.
I stayed in the backyard and fed the machine while Joe was upstairs doing the blowing. The directions to run it are right on the it in words and pictures.
We only ended up using 6 packages throughout the entire attic. Joe added 9 inches across the whole space. It looks like it was covered in a layer of fresh snow. It did make a bit of a mess underneath the attic opening, but it was nothing that the vacuum cleaner couldn't take care of. I did wear my face mask while I vacuumed just to be safe.
In total, we spent about $180 which we should recoup within a few months this winter, and it should make the house more comfortable year round. I would call this project a home run! If you are considering this as something your house might benefit from, please make sure to do your research before you do it. It's not a hard project, but it does take some planning. I'd love to hear from you if you've done this and found it to help, or if you're considering this now.