Weatherstripping and caulking your home can reduce your heating and air conditioning costs by as much as 30 percent. This article covers the what, why, where and how of weatherstripping and caulking your home.
Weatherstripping is used to create a tight seal between the moving parts of doors and windows. Whereas caulking is used to seal gaps between nonmoving parts of doors and windows (such as around frames) and other openings around the outside of your home.
Weatherstripping is typically a foam-like or spongy material made into thin strips. And caulking materials are typically a paste-like substance, which come in disposable cartridges for use with a caulking applicator (called a caulking "gun").
The un-sealed areas around doors and windows are the main cause of air leakage in most homes. Weather-stripping these areas can reduce your heating and air conditioning costs by as much as 30 percent. Adding weatherstripping and caulking are low-cost projects that can often pay for themselves in the first year, by saving you money on your heating and cooling costs.
Weatherstripping and caulking works by blocking air from coming into and out of your home, which makes your heating and cooling systems work harder. And even if your home was properly weatherstripped and caulked when it was first built, your home settles over time and construction materials will swell and contract, resulting in gaps to form. These gaps allow outside air to leak in and need to be sealed with weatherstripping and caulking.
There are several methods for testing for the need for weatherstripping and caulking: on a cold, windy day feel with your hand from inside your home; turning off furnace and turning on all exhaust fans, and testing for movement with an incense candle; and, shining a flashlight from outside on a dark night.
All doors leading outside should be weatherstripped, as should doors between heated (and air conditioned) and unheated (and non-air conditioned) spaces inside of your home.
Caulking should be used on the outside of the house wherever two different construction materials meet (around door frames, window frames, chimneys, etc.). You should also be sure to check any places where pipes or wires penetrate the outside of your home (or to unfinished areas inside your home), and add caulking to seal the areas around these penetrations.
You should also install rubber gaskets behind outlet and switch plates on exterior walls, to help eliminate air leaks.
Before adding any weatherstripping, first make sure the doors and windows are working properly. If they are crooked, they should be repaired before adding weatherstripping. Do not make weatherstripping so tight or windows and doors that they will not open and close smoothly. Properly installed weatherstripping on doors should seal well when the door is closed, while still allowing the door to open freely. When weatherstripping a door, the bottom of the door should be sealed, as well as the casings and the jambs. Weatherstripping for the bottom of the door can be installed on either the threshold or the door bottom, or both.
When deciding which weather-stripping materials to use, consider the price, how long it will last, and how it needs to be installed and maintained. A more expensive material may be a better buy because it will last longer and require less maintenance.
For locations which require caulking, you should use the highest quality caulking material suited for your job. It will be easier to apply, perform better, last longer, and require less maintenance.
The government supports improving energy efficiency of your home, so be sure to check to see if your weatherstripping or caulking project qualifies for any federal or state tax credits or rebates.
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