How To Insulate A Garage Ceiling Already Drywalled

If your garage ceiling is already drywalled, you can insulate it by first attaching furring strips to the ceiling joists. Then, cut pieces of insulation to fit between the furring strips and staple or tape them in place. Finally, install a vapor barrier to keep moisture from damaging the insulation.

4 Steps to Insulate A Garage Ceiling Already Drywalled

One way to insulate a garage ceiling already drywalled is to add insulation between the studs. This can be done by adding batts of insulation or by spraying foam insulation into the space. Another way to insulate the garage ceiling is to add a layer of drywall over the existing drywall. This will add an extra layer of protection against heat loss.

One of the most important things you can do to save money on your energy bills is to learn how to insulate your garage ceiling. This will help keep your garage cooler in the summer and warmer in the winter, which can save you money on your energy bills.

Step 1: Install Insulation

Start by measuring the width and height of the garage ceiling. Cut the insulation to size and fit it snugly between the ceiling joists. Next, use a hammer and nails to secure the insulation in place. Finally, install the vapor barrier by stapling it to the underside of the ceiling joists.

Step 2: Seal All Seams With Caulk Or Spray Foam

To insulate a garage ceiling that is already drywalled, seal all seams with caulk or spray foam. This will prevent air from leaking through the seams and will also help to keep the garage warmer in the winter and cooler in the summer.

Step 3: Install A Vapor Barrier

A vapor barrier is an important step in insulating a garage ceiling already drywalled. By installing a vapor barrier, you will help to prevent moisture and condensation from building up on the inside of your garage ceiling, which can lead to mold and mildew growth.

Step 4: Install Baffles Or Insulation Over The Garage Door

If your garage ceiling is already drywalled, you can still insulate it by installing baffles or insulation over the garage door. This will help to keep the heat in during the winter and the cool air in during the summer.

Frequently Asked Questions

Can You Spray Foam Without Removing Drywall?

Spray foam insulation can be installed without removing drywall, but it is more difficult to do so. It is possible to cut the drywall to create a hole for the nozzle of the spray foam insulation, but this will require patching the drywall after the fact.

How Long After Drywall Can I Spray Foam?

Once the drywall is up and sanded, you can go ahead and spray foam.

Can You Install Insulation Without Removing Drywall?

You can install insulation without removing drywall, but it is not as effective and can be more difficult.


In order to insulate a garage ceiling that is already drywalled, it is best to use a batt or rolled insulation. Batt insulation can be cut to fit between the studs and then secured in place with wire, while rolled insulation can be easily taped to the seams in the drywall.

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