Marvelous Insulating 2x4 Garage Ceiling
Insulation is the only way to keep the heat out.
Insulating 2x4 garage ceiling. Fiberglass blanket would definitely be the most cost effective in a small space such as you have. If someone spends a lot of time in the garage insulating it may improve their comfort even if it doesnt lower any bills. R-19 05-in x 4-ft x 8-ft 1 Faced Polystyrene Garage Door Foam Board Insulation.
I would use unfaced FG and a 4 or 6 mil plastic vapor barrier installed before you drywall. 3 12 Inches - Two-by-four 2x4 stud walls with true 4-inch depth. If you are insulating the garage ceiling not only by the truss level but also up by the roofline then you must leave at least 1 12 to two inches of air between the fiberglass and the underside.
Here are what I think are some of the most important ones. There are different garage ceiling insulating materials you can use but fiberglass is the most widely available. Make sure you have enough ventilation on your roof as well.
If the collar ties are 2X6 then the most blanket type insulation you can install is R19. That means a rough estimate for the average insulation of a garage. Some amount of thermal transfer will still occur through the joists themselves.
Attach it to underside of rafters and tape joints. It is strong cheap and adjustable. Vented assembly above the insulation.
Start putting the pads into place and use a high strength staple gun to secure them into position. Its easy to say Oh yeah just put 12 drywall on your ceiling forgetting that it weighs over 50 pounds. Insulating your garage ceiling has several benefits and you dont have to spend loads of money to see them.