Heat and conditioned air loss around your doors is costing you more money than you might think. One of the quickest and easiest ways to reduce energy waste is to seal air leaks by using weatherstripping. Weatherstripping will stand temperatures between -40 and 50 degrees Celsius.
In this video Mark Donovan of http://www.homeadditionplus.com shows how to install a bottom door seal. Replacing a bottom door seal is easy to do and requires just a few tools: a screw driver, drill and drill bit, and a hacksaw.