One of the main problems you encounter when trying to remove rusty or corroded screws from decking boards or anywhere else is that the slots no longer hold a screwdriver. You can get around this by using pliers or a screw extractor, but if the screw is severely rusted, the head may break off.
The procedures for extracting rusted screws range from mildly troublesome to drastic, depending on how difficult the screw is to remove. Start by removing paint and varnish from the screw slots with an awl.
Basic Extraction Strategies
Things You Will Need
- Rubber band or rubber glove
- Locking pliers
- Epoxy glue
- Using the proper screwdriver for the screw head, bear down with all your weight before trying to turn it counterclockwise. It helps to use the longest screwdriver you have -- the longer the handle, the more of the force you apply to it gets transferred to the screw.
- As soon as the head starts to strip, stop applying torque. Remove the screwdriver and put a thin [piece of rubber](http://www.bobvila.com/articles/how-to-remove-a-stripped-screw/#.VZREiRNViko), such as a rubber band or rubber glove, between the head and the screwdriver. Try again.
- A drill can apply more torque than you can by hand. Push the drill, fitted with the appropriate screw bit, onto the rubber with as much force as you can muster and operate the drill for a second in reverse.
- Chip out enough wood around the screw head -- using a chisel -- to allow you to [grip the head](http://www.nytimes.com/1983/05/08/nyregion/home-clinic-some-tried-and-often-true-ways-of-removing-stuck-screws.html) with locking pliers. Once the pliers have a firm grip, use them to turn the screw counterclockwise.
- If you don't want to chip out wood -- or the screw is embedded in metal -- find a nut that's the same size as the screw head or a little bigger and glue it to the head with epoxy cement. When the glue sets, use a wrench to turn the nut and extract the screw.
Start with a screwdriver.
Get your drill.
Glue a nut.
The Screw Extractor Option
Things You Will Need
- 1/8- to 1/4-inch drill bit
- Screw extractor
- Drill a 1/8- to 1/4-inch hole in the screw head, using a metal boring bit. Make the hole about 1/4 inch deep. Wear goggles when drilling into metal because tiny shards can easily fly into your eyes.
- Fit a screw extractor to your drill. Use one of an appropriate size for the screw.
- Push the tip of the extractor into the hole, put your full weight on the drill, and run it in reverse. The screw should back out.