A fact of life when owning a house is that windows sometimes get broken and need to be replaced. The do it yourself homeowner can save a few bucks by replacing these broken windows instead of hiring someone to do it. It's even quicker to replace a window pane in an aluminium window frame than it is with a traditional wood window frame.
Measure the glass part of the window and then add ½ inch to the height and width. If the glass is missing, measure the opening from inside edge of frame to inside edge of frame.
Measure the thickness of the old glass. The standard thicknesses are 1/8 inch or 3/32 inch. Be sure the get the correct thickness when buying replacement glass.
Place glass on a table. Remove the screw from the top right hand corner and the bottom left hand corner.
Slide the corner with the screw removed off the edge of the table. Tap the frame with a rubber mallet to remove it from the glass. Reposition window so the other corner with the screw removed is hanging over the edge of the table. Tap with rubber mallet to remove glass from aluminium frame.
Wearing thick work gloves and safety glasses, remove the rubber from the frame and clean all bits of glass from it.
Wearing thick work gloves and safety glasses, carefully remove the pieces of glass from the two parts of the frame.
Place replacement pane of glass on table so two sides hang over the edge. Place the rubber on those two edges.
Put half of the frame against the window. Tap the corner on with the rubber mallet. Tap one edge against the rubber until the glass is seated. Next, do the other edge.
Repeat, placing the other half of the frame on the remaining two sides of the replacement window pane.
Replace the screws in the corners of the window frame.