Caulking seals the leaks in your home that let the hot or cold in. If you want a cheap and effective way to save that cash that regularly goes to pay your electric or gas bill then caulking is your ticket.
Caulk forms a flexible seal for cracks, gaps or joints less than 1-guarter-inch wide. You can use it to seal air leaks in many places throughout your home, including around windows and door frames.
Caulking is very easy and doesn’t take a lot of time. With a ladder and a caulking gun you can caulk all your windows in no time. Caulk guns are pretty cheap, but caulk compounds can also be found in aerosol cans, squeeze tubes, and even caulk ropes.
Most caulk compounds come in disposable cartridges that fit in half-barrel caulking guns. Some pressurized cartridges do not require caulk guns.
When you are trying to decide how much caulk you will need, consider that you will probably need about a half-cartridge per window or door. For the foundation sill you will probably need at least 4 cartridges, depending of course on how large your house is.
Okay, here is how you apply caulk: