|Forum topic by Vrtigo1||posted 06-22-2011 09:08 PM||1540 views||2 times favorited||17 replies|
06-22-2011 09:08 PM
I posted a thread about this last year and never ended up doing anything about, but it is getting to the time of year here in Florida where it’s very unpleasant to be in my garage for longer than about 5 minutes due to the heat.
So for this post, I have two main questions.
First question is regarding insulation. My garage is approx 24×24 with 9’ ceilings, and is uninsulated. My garage door is just the sheet metal type. I’ve seen that Lowe’s sells a garage door insulation kit which looks like it consists of the foil backed foam insulation panels, and I’m planning on either using that or buying insulation panels and cutting them to size if the kit doesn’t fit.
The layout of my garage is shown below:
As you can see, the garage door faces east, so it gets sun in the morning. This isn’t a huge deal, because I’m usually out there in the evenings, when there is minimal sun on that side of the house.
The north (right) wall is cement block.
The south (left) wall partially adjoins the inside of my house, and that section of the wall is insulated, the rest of the wall adjoins a covered entryway that leads to my front door. That is just a wood frame wall with drywall on it that is uninsulated.
The west (top) wall adjoins the inside of my house and is insulated.
The attic above the garage is uninsulated. There is tons of space up there, but unfortunately I nailed down a pressboard floor shortly after moving in, so I’m thinking I’ll have to take at least some of that up to insulate it.
So in summary, I think what I need to do is add insulation to the south wall, ceiling/attic and garage door.
Now as far as what type of insulation to use, I’m not sure. Home Depot will rent you the machine to do “blow in” insulation for free if you buy the insulation from them. That seems like the only option for the walls, as they are already drywalled. As far as the attic floor, blow in insulation would be easier, but if roll insulation will be a better solution then I can sweat through doing that.
The blow in insulation that I’ve seen on HD’s website has a pretty low R-value, i.e. 4 or so. That doesn’t seem like it’d really even be worth doing. From what I’ve seen other people do in their shops, I’d want something like R-19, right?
Now the second question regarding air conditioning. Once I get the insulation squared away, I’m considering adding an A/C to keep the shop comfortable. I have no windows, so a window unit is out. I currently have a portable A/C unit which I think is 12,000 BTUs. It’s the single hose type, and it is vented out a dryer vent in the south wall.
I’ve done some research and a mini split seems like the way to go. For my second part of the question, I would be interested in hearing from people that actually have one. I’ve seen prices ranging from about $800 all the way up to several thousand dollars. What do you have, what did it cost, how much space are you cooling, insulated/uninsulated, did you install it yourself, and are you happy with it?
I’m trying to gauge what size I need, how hard installation is, and whether or not I should trust one of the bargain priced units that can be bought online or if I really need to make the 3-4 thousand dollar investment of having a local professional do it for me.
Thanks for any and all advice!