We bought our house about a year ago with a nice sunroom off the back. For about 3 seasons a year, it is great. But it turns out this room was installed with barely any insulation at all. Last winter, we put those clear plastic window insulator kits over the windows, but the double-wide doorway between the sun room and the rest of the house was still just a cool breeze constantly blowing into our house, making it chilly in the main part of the house and causing our heat to run all the time. When they added this room to the house, they also removed the doors from that double-wide doorway that had formerly been the back door to the house. We ended up stringing a thick blanket over that double wide doorway at night to prevent the worst of the cold air from coming in, but during the day we like to use that room, so all the cold air comes in anyway. Not to mention stringing a blanket across your doorway is kind of janky.
On top of all that, the seal between the sun room's roof and the rest of the house is not great, meaning we get water leaking into the sunroom during rainstorms if the wind is blowing from a particular direction. We've had a couple roofing companies come out to look at it, and they all say things like they "think" they can do something that will "probably" help fix the problem, but seal issues on old brick are "difficult," so I'm not filled with confidence. They want to charge about $1000-$1500 to try to fix the leaks.
Now, we really like this room. It is a great family room, and a great place for the kids to play. So ideally, we want this room to be comfortable year round, and not leaky. And we would like to stop throwing money at our heating bill in winter.
What would you mustachians do?