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 1 2 to two inches of air between the fiberglass and the underside.
Insulate garage ceiling or roof.
Similar to wearing a hat in the winter you need to make sure the top of the garage is protected to trap the heat in.
It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow.
I wrote a tutorial on how to waterproof and seal your garage walls using drylok.
Box out light fixtures.
It isn t important to insulate the ceiling between the attic and the garage because those areas are not affected by a home s heating and cooling system.
Insulating the garage ceiling is a quick and simple way to warm up one of the coldest parts of your home.
There are better ways to spend your money on garage improvements that may help lower your energy bills.
Once you have decided to insulate your garage roof there are various things to consider pitfalls to avoid and best practices to follow to get the job done perfectly.
This allows you to put insulation on the bottom side of the rafters but allows outside temperature air to circulate under the roof continued michael karas feb 20 16 at 23 18 continued from above surface and helps prevent ice buildup on the roof when there is standing snow on the roof.
You can buy insulation kits for standard metal garage doors or you can cut pieces of rigid foam insulation to fit each door panel section.
This will make the garage space more appealing to work in and it will allow you to store a greater variety of items that may currently be cluttering up your house.
Insulating the ceiling is the most important part of the garage because heat rises and escapes through the roof.
Types of garage roof pitched or flat.
Some do it yourselfers commonly forget to leave air space between the fiberglass and the underside of the wood roof sheathing.
How to insulate a garage step by step.
How to insulate a garage door.
Here s my step by step process for how i added insulation to my garage.
Instead of insulating the garage attic.
Water is insulation s enemy.
This will allow you to add the needed insulation.
Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be.
Don t insulate your garage walls and ceiling without insulating the big garage door too.
If the garage is open to the rafters the boards that support the roof use r 38 insulation between the rafters at the roof if they are 10 inches deep.
To get more insulation in the garage install a ceiling and provide access to the space between the ceiling and the roof.
If you didn t do that before you put the frame up you can still do it now although it s going to be.
Let s take a look at how to perform a garage ceiling insulation effectively.
Garage ceiling insulation is cheap accessible and easy to install.