How to install underfloor insulation batts

Jason
View the video

How to install underfloor insulation batts

View the video
×

More D.I.Y. Advice

air conditioner

Heating & Cooling How to choose the right cooling system for your home The mercury is rising but don’t sweat it. There are loads of easy and inexpensive ways to keep you and your house cool. But which cooling system is right for your home and how do you choose the right one?

Ceiling fan

Heating & Cooling How to choose the best ceiling fan Ceiling fans are a great way to stay comfortable when the temperature rises. When choosing the best ceiling fan for your space, there are a few things you might want to consider.

living room

Heating & Cooling How to cool your house naturally With summer just around the corner, it’s time to start thinking about how to keep cool and comfortable. The good news is there are lots of smart ways to keep your home cool.

Pet doors 02:54

Heating & Cooling How to create an airtight home To have an airtight home, you’ll need to prevent airflow leaving your home. We’ll show you some places which may leak air and what you’ll need to do to reduce it.

Material for insulating your ceiling 01:31

Heating & Cooling How to insulate a ceiling Keep your home warmer in winter and cooler in summer by insulating your ceilings. We’ll show you all you need to know about installing ceiling insulation.

Man in protective gear removing insulation 01:02

Heating & Cooling How to remove insulation Everything you need to know about removing fibreglass insulation.

Moisture absorber 03:36

Heating & Cooling How to protect your home from dampness When you live in areas prone to high rainfall, such as the tropics, it’s important to protect your home from dampness and mould. We’ll show you how to do it in a few simple steps.

DeLonghi dehumidifier set up in a bedroom

Heating & Cooling Benefits of DeLonghi Dehumidifiers If you have high levels of humidity inside your home, you may need the help of a dehumidifier. Ricel from De’Longhi explains the benefits of De’Longhi dehumidifiers , and how they can help you create a healthy home environment.

Project Overview

Insulating your floor makes your home more comfortable and reduces your heating and cooling costs. We show you how to install the insulation batts yourself. You will learn how to put the batts in between the floor joists and trim them to size. We also show you how to install support strapping under the batts to stop them from sagging.
Continue to step-by-step instructions

Step by Step Instructions

1 Install strapping to support the glass wool floor insulation
2 Install the glass wool insulation in the floor
  • Step 1. Install strapping to support the glass wool floor insulation

    Staple the strapping across the gap under your floor joists. Pull the strapping tight across the gap before stapling it in place. The manufacturer’s instructions recommend installing at least three straps under each batt, but it is easier to simply lay a line of strapping every 200mm across the whole floor.
  • Step 2. Install the glass wool insulation in the floor

    Open the packets of batts one at a time and let the contents expand before you install them. Fluff each batt up and install it between the joists in your subfloor. To get the best results, keep the batts snugly together. If you have any small gaps left, trim the batt to size with you scissors.

Tools and Materials

Tools

  • Gloves
  • Scissors
  • Staple gun
  • Tape measure
  • Trimming knife

Materials

  • Floor insulation strapping
  • Glass wool floor batts
air conditioner

Heating & Cooling How to choose the right cooling system for your home The mercury is rising but don’t sweat it. There are loads of easy and inexpensive ways to keep you and your house cool. But which cooling system is right for your home and how do you choose the right one?

Ceiling fan

Heating & Cooling How to choose the best ceiling fan Ceiling fans are a great way to stay comfortable when the temperature rises. When choosing the best ceiling fan for your space, there are a few things you might want to consider.

living room

Heating & Cooling How to cool your house naturally With summer just around the corner, it’s time to start thinking about how to keep cool and comfortable. The good news is there are lots of smart ways to keep your home cool.

Pet doors 02:54

Heating & Cooling How to create an airtight home To have an airtight home, you’ll need to prevent airflow leaving your home. We’ll show you some places which may leak air and what you’ll need to do to reduce it.

Material for insulating your ceiling 01:31

Heating & Cooling How to insulate a ceiling Keep your home warmer in winter and cooler in summer by insulating your ceilings. We’ll show you all you need to know about installing ceiling insulation.

Man in protective gear removing insulation 01:02

Heating & Cooling How to remove insulation Everything you need to know about removing fibreglass insulation.

Moisture absorber 03:36

Heating & Cooling How to protect your home from dampness When you live in areas prone to high rainfall, such as the tropics, it’s important to protect your home from dampness and mould. We’ll show you how to do it in a few simple steps.

DeLonghi dehumidifier set up in a bedroom

Heating & Cooling Benefits of DeLonghi Dehumidifiers If you have high levels of humidity inside your home, you may need the help of a dehumidifier. Ricel from De’Longhi explains the benefits of De’Longhi dehumidifiers , and how they can help you create a healthy home environment.

Rug 01:13

Flooring Ideas How to choose the right rug for any room A rug can add warmth, personality and really affect the look and feel of a room. The trick to finding the right rug for any room comes down to three things: size, colour and material.

tiled bathroom

Flooring Ideas How to choose the right type of flooring With so many different types of flooring available, choosing the right type for your home is not easy. Whether your priority is function or style, there's a flooring option to suit every room in your home.

Floor covering material 01:13

Flooring Ideas How to choose floor coverings for a beach house Choosing the right floor covering for a beach house is important. Find out the best floor coverings and how to clean them.

How to lay laminate flooring 05:32

Laminate & Vinyl How to lay laminate flooring Laying a laminate floor can be a relatively cheap, quick and easy way to update a room in your home. It’s relatively easy to do yourself and we’ll show you how.

0225RemoveLino09summary 04:06

Laminate & Vinyl How to remove vinyl floor An inexpensive way to help give an old room a facelift.

Dry lay the tiles before applying adhesive 04:49

Tiles How to lay floor tiles Tiles are a great way to bring colour and style to a room. We’ll show you how easy it is to lay floor tiles with this easy to follow guide.

Scrape grout with removing tool 05:28

Tiles How to replace a broken floor tile A broken floor tile in your kitchen or bathroom can be a real eyesore and potentially dangerous. Learn how easy it is to you can replace a tile yourself.

Woman installing chipboard floor panel 03:56

Subfloor How to lay chipboard flooring Tongue and groove chipboard flooring is a common building material. Learn how quick it is to install yourself.

Health & Safety

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 that 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.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.
Top of the content