How to insulate walls

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How to insulate walls

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Project Overview

Insulation in your walls reduces heating and cooling costs, and helps stop sound travelling between rooms. We’ll teach you how to trim insulation batts to size and install them between the joists in your wall cavity.
Continue to step-by-step instructions
Time Required

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Done in a Day

You'll need to set aside a day to comfortably complete this project

 

Step by Step Instructions

1 Install insulation batts in the wall cavity
2 Trim the insulation to fill small gaps in the wall cavity
  • Step 1. Install insulation batts in the wall cavity

    Before you start, switch off the electricity and make sure all your electrical cables are safely out of the way. Then push the batts between the wall studs. Make sure you fill every gap in the cavity of your wall.
  • Step 2. Trim the insulation to fill small gaps in the wall cavity

    When you are insulating smaller spaces, measure the gap between the studs then trim your batt to size using a knife and a straight edge. Cut the batt slightly larger than the gap so it sits snugly in place. When the whole wall cavity is filled, you’re ready to put your wall up.
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Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions which came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings team member.

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