How to insulate garage ceiling?

[Nancy12]

Hi, 

I have moved to my new house for a year. The garage is super hot in the summer. I want to insulate the garage ceiling before summer coming. I have no idea about what product I should use, how to do it and what tools do I need.  Do I need to insulate the garage door as well?  It will be great if I can get some advice.

Thank you very much

Nancy

[EricL · Accepted solution]

Hello @Nancy12

Welcome to the Bunnings Workshop community. Thank you so much for joining us and sharing your question about insulating your garage ceiling.

It's great that you've decided to insulate your garage ceiling. Here are a few things to consider before buying your insulation.

• What "R" value to install. The "R" value is how resistant the insulation is to heat transfer. A higher R-value means a higher insulating rating. Some states recommend certain "R" values to maximize the effectiveness of the insulation. Speak to your local store specialist for the recommended rating in your state.
• How much area do you need to cover? For example, one bag of Earthwool R4.0 195mm x 580mm x 1160mm 12.11m² Insulation Ceiling Batt - Pack of 18 will cover an area of twelve square meters. 
• I recommend using GI Building Sciences 10mm 0.5 x 23m 11.5m² Reflecta Garage Door Insulation for your garage door.

Here is a handy step-by-step guide: How to insulate a ceiling

Let me tag our experienced members @TedBear and @tom_builds for their recommendations.

Every state has its own rules regarding the installation of ceiling insulation. Some need permits, others require that you be a licensed installer. I recommend checking with the local council in your area to find out what the regulations are. Please keep us updated.

If you need more advice or information, please let us know.

Eric