The Ultimate Glossary Of Terms About Replacing Seal On Windows
Replacing Seal on Windows
While window seals are designed to last, they will wear out over time. A damaged seal can affect the window's performance, visibility and energy efficiency.
Natural house settlement can cause the frame surrounding your glass to shift and cause the seal to break. If not taken care of, a damaged window seal can lead to significant increases in your power bill or water damage.
Weatherstripping
A durable seal in your windows keeps drafts from entering and allows you to reduce your heating bills. It can also be used to block unwanted noise. Weatherstripping is one of the easiest DIY projects and takes only minutes to complete. Replacing and repairing your window seals will improve the appearance of your house.
Make sure to check the frame and sash prior replacing window seals. It is necessary to replace the seals when you feel drafts, or you notice an opening. If the glass is breaking or peeling from the glass, scrape it off and apply a new coat of window glazing putty ($11, The Home Depot). You should also make sure that all screws are in good condition and that the jambs and sash are dry, clean and smooth.
There are a variety of methods for installing replacement window seals based on the kind of windows. If you have windows that are stationary and can't be shut or opened, you can use rope caulk (available at The Home Depot for $7) to fill the gaps between the frame and the sash.
Utilize vinyl "V strips" between the sash channels and the sash stiles on double-hung windows with sliding windows. Make sure the strips are firmly placed on both sides of the channels to provide an airtight seal when the sashes close. For casement windows that sit on a hinge and have to be opened with a crank, use foam tape to secure the top, bottom and side of the window stop.
Foam tape is cheap, less than a buck for a foot, and is easy to set up. It can be used to seal gaps up to one inch. If you're looking for a more durable and stronger sealer for gaps larger than one inch wide, try EDPM (ethylenepropylenediene monomer) or all-wool Felt. Those types are suitable for the bottom of the door and window sash as well as doors that open and close frequently.
Spring bronze weather stripping works well for windows with fixed panes. It requires more labor because you'll have to cut it using tin snips to the exact dimensions of your window, however, it provides a durable seal that will last for a long time.
Caulking
Caulking can be used to seal small gaps in your windows. It's quick and affordable. It can lower energy costs and carbon footprint, as well as keep condensation and mold from forming. The type of caulking that you use will depend on the environment and the materials it is used on. You will need acrylic latex for dry areas and vinyl latex for damp areas. If you aren't sure which to pick, consult an expert in your local hardware store for recommendations.
To replace the seal of your window, you must remove the old caulking. Clean the area, apply a new layer. Make sure the gap is completely dry, as moisture or dirt could prevent the caulking from adhering. Make sure that the window frame is made of fiberglass or wood before you begin.
Window seals need to be able to deal with the pressure of a lot, but they can still get worn out over time. It is essential to have a strong seal to avoid drafts or water infiltration, as well as damage to the frame of the window or the movable sashes.
Insufficient insulation can also raise your cooling and heating costs due to a broken window seal. This is because your heating and air conditioner will have to work overtime to make up for the loss in energy efficiency caused by a broken window seal.
Another sign that your window seal is worn down is when you observe condensate forming between the glass panes. This means that the gas between the glass panes is depressurized, and is now mainly comprised of air and water vapour instead of argon and krypton which are more dense than air and possess better insulation properties.
Replacing the window seal could be a complicated process and requires professional expertise and equipment. It is recommended to hire a professional for this job since it's not something a DIYer can do. Some windows will need to be taken apart to be replaced. This isn't for the clumsy.
Sealant
Modern triple-pane and double-pane windows feature an inner seal (or seals) between their panes that aid in keeping argon or krypton gas in the window to improve its insulation properties. The seal inside the window can be broken and this could cause a variety of problems, including condensation between the glass and drafts. A broken seal can also lead to a decrease in the efficiency of your home and a rise in energy costs.
The window frame may also create draughts or cold air. It could be due to damaged or cracked caulking or simply because the original caulking is worn out. To prevent draughts and cold air, you can replace the caulking you have in place with silicone sealant. Silicone is popular because it comes in a variety of colors and can be applied easily to the window edge.
There are many types of silicone sealants that are available. Choose one that has high adhesion and is impervious to moisture. Some are specifically designed to work with uPVC and offer excellent flexibility. Some are more durable and designed for outdoor use. Some are even treated with anti-fungal agents to stop the growth and spread of mold and mildew.
Variations in humidity and temperature can also cause window seals to fail. This can cause them expand and contract, which will eventually cause the seal to crack.
A broken window seal can also be caused by the inadvertent installation or maintenance of the window, specifically if there is gaps between the glass and the frame. This could cause water to seep into the frame or sash, and cause damage or allow dust to build up between the panes.
It is possible that your triple- or double-paned windows were put in place under the warranty. Examine the warranty documentation and contact the window manufacturer to find out if you are covered. You are still able to repair your windows if you do not have insurance. The argon gas will not be able to be re-sealed, but the cost of fixing the IGU windows is much less than replacing them.

Window Frame
Window frames are made from various materials. Wood, vinyl or aluminum clad are all feasible materials. replacing seal on windows is typically coated with a protective layer to make it easier to maintain. Wood frames are very popular and provide the benefit of being durable and efficient. They do require regular painting and staining to stop rot and insect infestation. Aluminum and vinyl require less maintenance, but do not last as long as wooden alternatives.
Whatever the material the frame may shift a bit over time. This can cause gaps and the window seal to break down. This can be a problem if the house is settling, or if wind or water damage weakens frame structure.
A damaged window seal may cause condensation and a fog. This could be caused by an inert gas leak or depressurization. The problem can be remedied by a professional window defogging process but it's not an optimal solution. The defogging process can only remove the moisture causing fog, and will not replace the argon gas originally used to increase the insulation value of the window.
Extreme temperature changes can cause problems in certain cases. The glass can be caused to expand and contract, which may create pressure on the window seal. In addition extreme weather conditions such as high humidity can contribute to the window seal becoming leaky.
If the window is under warranty it is a good idea to contact the manufacturer and see what alternatives they have to replace the window seal. This is generally the best option over trying to repair or replace the IGU (insulated glass unit) on your own, since this can be expensive and difficult.
The warranty can include repair or replacement, based on the quality and type of the window. This could save homeowners money over the course of. It is important to keep in mind that a warranty only covers the IGU not the entire frame.