A garage that’s attached to your home not only protects your cars, it serves as a multi-functional storage space and creative place, otherwise known as the Man Cave! It goes without saying that today’s American family needs to treat their garage just like any other important room in the house, insulating for energy efficiency, and more…
- To keep it warmer in the winter and cooler in the summer
- To help control the temperature in rooms above the garage
- To tinker or work on man cave projects in a comfortable environment
- To cut down on noise pollution associated with power tools
- To prevent potentially harmful gases or chemicals from entering living spaces
- To create a safer living environment for your family
Types of Insulation for Your Garage
For garages where the walls have studs and no drywall, 15″ wide R13 fiberglass blanket insulation is the most common and cost efficient. However, blanket insulation comes in different widths to accommodate various studding and depth. Rock wool insulation is made from volcanic rock and used for fire prevention, which is good for the garage wall that’s attached to your home. Loose-fill and sprayed foam insulation are easier to install in walls that already have drywall installed.
Based on your local climate, the effectiveness of insulation is determined by an R-value, which measures the resistance of the insulation to heat flow. A higher R-value or number means a greater ability to insulate. Consult a hardware center specialist for the best garage R-value in your area.
Like most rooms in the house, it’s a good idea to insulate garage walls and the attic, if your garage has one, as well as air sealing the wall cavities between the garage and walls directly connected to the living spaces, caulking windows and running weather stripping along the garage door. Here’s a checklist:
- Look for any obvious holes, gaps and cracks in garage walls and seal them with spray foam. Remember to check around electrical wires and plumbing fixtures and plug with spray foam or silicone caulk.
- To avoid any fumes from seeping underneath the walls into the house, run a bead of silicone caulk along the bottom of the wall that’s attached to your home.
- When insulating the garage wall that’s attached to your home, place fiberglass blanket insulation so the kraft facing, or vapor retarder, is facing inward toward the living spaces, with the fuzzy stuff exposed to the garage space.
- For all other garage walls, install the fiberglass blanket with vapor retarder facing out, into the room.
- If the walls in your garage already have drywall installed, blow in loose-fill fiberglass or cellulose insulation by hose through a hole you cut into the drywall.
- Insulate a garage attic like you would any other attic in your home. For more on this, read our blog post, How to Effectively and Easily Insulate Your Attic
- Cover and protect blanket insulation with 2×4’s, plywood or drywall
- Nail 2×4’s over the top of blanket insulation between the studs in a secure pattern,
- Or, secure plywood to the walls using screws with the A-grade side facing out,
- Or drywall can be used in place of plywood; tape and mud as necessary.
- For loose-fill and spray foam insulation, repair the access hole in the drywall.
- Measure the space between the garage door and concrete floor, then cut a piece of weather stripping to fill the gap, securing the weather stripping to the door with glue and screws.
- Caulk around the outside of the garage door, using silicone bead.
Our expert staff is always on hand to help you plan your next winterizing project. From safety glasses and gloves to insulation vacuums and blowers, if you have any questions about what to choose, pricing or how-tos, don’t hesitate to contact us. Stop by our store — we’re open seven days a week.