If you have windows with single-pane glass, consider replacing them with windows that have double-paned glass with a low-e coating and argon gas filling. This is not guaranteed to eliminate condensation, but at the least, it should significantly reduce it.
To fix condensation on windows inside the house, you must make the inside and outside temperatures closer to one another. You must also stop moist air from touching the window glass. Window inserts stop moist air from touching the glass pane and keep the air around it at a relatively similar temperature.
Window sweating is what happens when condensation builds up on the interior surface of window glass and droplets of water appear. This condensation occurs when warm, moisture-rich indoor air cools against cold window glass, contracting and losing its ability to hold moisture.
To help with clearing the condensation away, you can make a simple, home-made solution by mixing two cups of water with two cups of white vinegar and a couple drops of washing up liquid. Pour this mixture into a spray bottle if you have one and spray the solution straight onto your window.
When warm, moist air comes into contact with cold window glass, water droplets form on the window's surface. Plastic film stops the formation of condensation on the interior of your window glass by creating a barrier between the air and the glass.
High humidity isn't the only reason for interior condensation. If the problem is only occurring on select windows, it's possible you have a draft problem. If there is moist air coming into the house around a particular window, that moisture will collect on that window pane first.
The other way to make your single pane window more efficient is to add caulking, insulation film, weather stripping, sealant, or other materials to the window to prevent cold air and heat from UV rays from getting in the home during the winter and summer months.
For the most part, single-pane windows are not recommended. Improvements to windows have come a long way since single-pane windows were the norm, and your single-pane windows are likely aging and in need of replacement.
To prevent heat loss through the movable parts of your windows, such as the gaps between the sash and the window frame, you can apply temporary insulation called weather sealing strips. Using EPDM, foam or felt stripping, you can cut the product to size and apply them over all the seams and gaps of your windows.
If you have aluminium frames, cut a piece of bubble wrap to the window size, and stick it on by spraying a little water on the window, then placing the wrap to help reduce condensation build up and heat loss.
If you have leaky holes that let the cold air in during the long freezing nights, you are the right person to apply plastic for windows. Furthermore, if you have old, single-pane windows, and you can feel the draft circulating through your home, it is time to apply this plastic and keep your home warmer.
In the medium to long term, condensation may cause mould and peel off the paint on the edges of your windows. The cures for condensation are heating (to keep surfaces above dew point temperature) and ventilation (to expel the warm, moisture-laden air to the outside).
Open Your Window
This might seem obvious, but it's effective. Opening your windows will release the humid air outside, and therefore, will prevent the humidity from collecting onto your windows. So, if it's not too cold out and you're suffering from condensation, open a window.
Use shutters if you have them – this is one of the best ways to reduce heat loss at night. Single glazing lets in more heat from the sun and shutters help to trap warmth inside overnight. Timber shutters reduce heat loss by 51%. Consider having ill-fitting shutters restored.
Single glazed windows are highly conductive – they easily let in unwanted cold air in winter and overbearing heat in summer.
The energy savings over single pane windows can be as much as 24 percent in cold climates during the winter and 18 percent during the summer in hot climates. That results in lower energy costs and less noise, which can be an important consideration if you live on a busy street.
Window Insulation Film
Window insulation kits are a more affordable way to insulate multiple windows. Using heat control window film doesn't interfere with the look of your windows. Leaving up to 1-inch space from the window frame border, apply adhesive tape to the entire window.
It is possible to convert single-pane windows to double-glazing. Retrofit double-glazing, usually made out of PVC or acrylic laminate, is applied to your existing single-pane windows to effectively turn them into double-glazed windows. Another method is through an acrylic insert held into place by magnets.
The best way to winterize your windows is to add a sealed layer of plastic or glass over the window. And the cheapest, easiest way to do this is by installing an interior window insulation kit. Duck brand Shrink Film Window Insulation Kit and 3M Window Insulator Kit are two readily available options.
The idea here is to apply Saran Wrap over the entire window, including the frame. By overlapping the strips, you create a continuous surface of the plastic. In theory, this plastic prevents icy breezes and moisture from getting into your home. It also won't damage your windows.