Replacing basement stairs. Drive the nails at an angle with the step and into the stringer (sidepiece) from above and below, if you can access the underneath. An alternate way of reinforcing stairs would be to screw into the stair through the stringer. It is always far better drill a pilot hole to prevent splitting. If the stringer has been over nailed or screwed, a block of wood can placed under the stair as reinforcement and nailed or screwed throughout the stringer, and then downward throughout the stair. If a stair is worn or broken, it has to be removed and a new one installed.
If the stairs are a basement or attic rough grade stair, buy a new toothbrush with a similar lumber through your local lumberyard or building supplier. Stairs are often rounded at the front and boards with this type are available. These are generally a share price item. Front edged rounded boards of this type are referred to as ‘bull nosed’ Get rid of the old damaged stair and clean the debris from the stringer. Carefully measure the size of the replacement required. Remember, measure twice and cut once.
Replacing basement stairs. If the stairs have, no risers (the back pieces) you may wish to add them how to the stairs before you repaint them. These will probably be a stock size lumber; all you need to do is cut them to the length required. Tools required for this repair; hammer, nails, wood glue, measuring tape, safety goggles, work gloves, drill and screwdrivers.
See also: Stair Tread Kit
Replacing Basement Stairs Gallery