Project Overview

Casement windows are a great way to bring light and air into a room. We show you how to install one into a wall opening. You will also learn how to install a waterproof flashing barrier under the frame and a simple way to level the frame up using masonite packers.
Continue to step-by-step instructions
This D.I.Y. Advice is part of a series How To Install a Casement Window
Time Required

Done in a Day

Done in a Day

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

 

Step by Step Instructions

1 Install waterproof flashing onto the bottom of the casement window frame
2 Mark up and drill pilot holes for the casement window frame
3 Level the casement window
4 Install the casement window
  • Step 1. Install waterproof flashing onto the bottom of the casement window frame

    Staple a strip of waterproof flashing onto the rear of the window frame so it can fold underneath and cover the base. Be sure to leave yourself plenty of overhang on either side. Staple that overhang tightly into position onto the sides of the window frame. This holds the flashing in place but leaves it loose at the front of the frame.
  • Step 2. Mark up and drill pilot holes for the casement window frame

    Mark up and drill pilot holes near the top and bottom of the sides of the window frame. The holes should be about 40-50mm back from the window jamb and 75-100mm from the top and bottom of the frame. The width of the hole should match the width of the shank of the screw.
  • Step 3. Level the casement window

    Place the window into the wall opening. If it is a heavy window, get someone to help you with this step. Use your spirit level to check that the window is level. If the window is not sitting exactly plumb, level it up with masonite packers. Then use your ruler to make sure the frame is sitting flush with the internal walls.
  • Step 4. Install the casement window

    When you are sure the frame is sitting in the proper position, drive screws through the pilot holes and into the frame of the house. To give your job the best finish, countersink your screws so they sit below the surface of the timber. That way you can cover them with putty before you paint.
D.I.Y. slatted shelf unit 03:23

Living Room How to build a D.I.Y. slatted shelving unit This slatted shelving unit is easy to make, can be painted to match your décor and is a handy place to put items on display.

Finished bedhead attached to bed 03:09

Bedroom How to make a modern timber bedhead How to make a modern timber bedhead.

DIY firewood rack 02:30

Living Room How to make a D.I.Y. copper firewood rack Keep your firewood handy with this stylish copper storage rack. It’s easy to build and portable, making it easier to take outside and re-stack with wood.

modern living room makeover 01:29

Living Room How to give your living room a modern D.I.Y. makeover There are a few simple ways to freshen up a tired living room and make it a real feature in your home. You can create more space by knocking out a wall and updating the furnishings to fit. By adding floating cabinetry and open shelves, you’ll have m...

How to make a play table for kids 02:32

Bedroom How to make a play table for kids This toy table gives kids a place to play with their toys and it includes a handy space for storage tubs underneath.

wooden puzzle stool 03:23

Bedroom D.I.Y. kids wooden puzzle stool Create a fun play area for your kids with these wooden puzzle stools. All you need is some basic materials and a bit of know-how. Discover how with Bunnings.

modern laundry makeover 01:04

Laundry How to give your laundry a modern D.I.Y. makeover By giving your tired, old laundry a modern makeover you can make it a place you enjoy using. In this D.I.Y. renovation, we’ve created extra storage space with new cabinets, the tapware adds a stylish touch, while the external door will make this a m...

bookshelf storage 02:32

Shelving & Storage How to make a D.I.Y. kids wooden bookshelf This kids wooden bookshelf and storage unit lets you put your child’s favourite books or toys on display.

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 Test.
Top of the content