The door step is the most frequently used step and it receives additional wear because people stop and stand on it to open the door. This causes premature wear and tear on the stair tread. The result is a squeaky or split tread board. Both are easy fixes if you have just a half hour and basic tools. You don't need any special skills, but a good eye for detail is required.
Inspect the door step to find a range of possible problems. Determine if the problem is just a loose nail. This is obvious because the nail head will rise and fall when the board is stepped on. The step will squeak as well. If this is the case, pry out the nail using a pry bar and replace with a new nail.
Inspect the step for cracks in the floor board. Step on the tread board and see if any larger cracks appear. This also causes squeaking in the board.
Remove the tread board by inserting a pry bar under the tread board in between the board and the stair stringer (the structure that the step is nailed to). Then pry it up from the stringer using the pry bar.
Place a new tread board in place on the stairs. A new tread board is available at a DIY centre. Use a mitre saw to cut the tread board to size if necessary.
Nail the tread board in place using a hammer and 5 cm (2 inch) galvanised nails. Hammer the nails through the tread board and into the stringers below to solidly secure them in place. Test the step once the repair has been made.