|Start by placing baffles in the spaces between the rafters.|
Jerry did a lot of research and found out the bonus room comfort issue is very common because almost all these rooms are improperly insulated. The typical bonus room is located above a home's garage, flanked by walk-in attics, and with attic space above it. It's easy to see why the room's temperature would be hard to control; you have heat or cold beating down on the roof, penetrating underneath through the garage, and surrounding the exterior walls in the walk-in attics. In our house the problem is compounded by vaulted ceilings on either side of the surrounding rooms, which gather rising hot air, the long, narrow shape of the bonus room, with only two vents at the far end, a giant picture window facing the sunny south side, and our gas water heater located off the room. The water heater is the main culprit in keeping my office so warm. In order to vent the gas thoroughly we can't really seal the attic closet off from the office.
|Baffles help stop air from being trapped between the roof and the insulation.|
|We used paper-faced insulation on the exterior wall|
We started by placing black plastic baffles on the interior roof in the spaces between the rafters. This helps to stop air from seeping in between the insulation and the roof and getting trapped. The baffles are not necessary on the exterior walls. There, we placed paper-faced R-13 fiberglass insulation in between each stud. We wore long sleeves, gloves, hats, safety goggles, and respirators to protect ourselves from the fiberglass.
|We used this unfaced insulation on top of the baffles on the roof.|
When we finished the exterior walls we placed unfaced R-19 insulation in the spaces between the rafters, on top of the plastic baffles. We used insulation stays, lengths of wire, to hold the insulation in place. After we placed all the insulation, we placed foam board on top of it. The board has foam insulation on one side and foil on the other. Tomorrow we will caulk or tape the seams in the board to further seal the space.
|Finally, we sealed the exterior walls and roof with foam insulation board.|
I'm hoping this will make our bonus room much more comfortable for us and our guests. Insulating the walk-in will keep it temperate enough to use as a toy room where the kids can store and go to get their toys, so we can get more use from it. Tomorrow I'll be back to working on my dolls, but I thought you might benefit from our insulation tale!