A twisted metal extension ladder can be dangerous and unstable. If the ladder is only slightly twisted, it can be twisted back to its original form. The key is to make sure that there are no defects in the metal that would make the ladder unusable, such as cracks in the metal. If the ladder is in great shape, then these tips will help to get it back to standing straight. Have a friend help you lay the ladder out straight on the ground. Make sure that the ladder is fully extended Have your friend hold the ladder straight while you put cement blocks on the twisted part of the ladder. The easiest way to do this is to have your friend stand on the twisted area and slowly back up as you place the cement blocks down. Leave the ladder for a few hours. The cement blocks will hold the metal in its straightened form, reshaping the ladder.