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Question: Mark, I want to install fiberglass insulation in my garage
including in the garage ceiling area. Eventually I want to drywall the garage,
but that is for a later date. For now, I just want to have a warmer garage
during the winter months. My question to you is whether or not it is possible to
install fiberglass insulation in a non-drywalled ceiling, or do I have no choice
but to first hang drywall on the garage ceiling joists before installing the
insulation?
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Answer: C.D., Insulating your garage is a great idea. I insulated and
drywalled my garage a couple of years after I built the garage addition. Even
though I do not heat the garage, the garage can be as much as 30o (F) warmer
than the outside during the months of January and February.
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In regards to answering your question on how to install fiberglass insulation in
a non-drywalled ceiling it’s pretty simple. Typically 1”x3” strapping or furring
strips are attached perpendicular to the ceiling joists for fastening the
drywall to. The strapping is typically spaced on 16 inch centers. In addition
and how it relates to you, the strapping also helps to hold the fiberglass
insulation in place. The fiberglass insulation is installed in between the
ceiling joists and is held up by the strapping.
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If strapping has yet to be attached to your garage ceiling joists it is both a
curse and a blessing for you. The curse is that you have to install the
strapping before installing the insulation, or at least some of it. The blessing
is that you can install it in a way that helps make the fiberglass insulation
installation go more easily.
As I stated earlier, typically strapping is spaced on 16 inch centers. This
tight spacing makes it difficult for passing the fiberglass insulation batts up
through the strapping and installing them in place in between the ceiling
joists. |
Photo By Mark Donovan |
To help make the installation of the fiberglass insulation into the
non-drywalled ceiling easier, skip every other row when installing the
strapping, so that there’s a 32 inch gap between strapping rows. This will give
you sufficient room to more easily pass through and install the fiberglass
insulation in the non-drywalled ceiling. After installing the insulation, you
can then go back and nail the additional strapping up to achieve the 16 inch on
center spacing.
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