Once you've got your window level, you need to make sure it's also flush to the inside wall. To do this, line up your set square against the wall and either push the window out or get a person outside to push it in, until the wall and window are level.
Pre-drill three holes into each side of the reveal at the top, middle and bottom. Use your set square to make sure the frame stays flush with the wall. Then drill in three screws to attach one side of the reveal to the wall. Now you have one side of the window attached, you won't need help to hold the window in place.
Asbestos, lead-based paints and copper chromium arsenic (CCA) treated timber are health hazards you need to look out for when renovating older homes. These substances can easily be disturbed when renovating and exposure to them can cause a range of life-threatening diseases and conditions including cancer. 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.
When following our advice in our D.I.Y. videos, make sure you use all equipment, including PPE, safely by following the manufacturer’s instructions. Check that the equipment is suitable for the task and that PPE fits properly. If you are unsure, hire an expert to do the job or talk to a Bunnings Team Member.