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An Guide To Window Sash Repairs In 2023
Window Sash Repairs

Window sashes must be regularly checked for mold, mildew and other damage. By catching these problems early you can save money on repairs in the future.

The sash is an interior frame that is able to move upwards and downwards in windows that are open. window repairs will show you how to perform several simple repairs to sash.

Weather Stripping

Wooden window sashes can give a classic look to your home. They are also durable and last for a long time if they are properly maintained. However, they can become damaged or degrade over time due to exposure to elements and wear and wear and tear. Fortunately, sash repair specialists can restore your windows back to their original condition and maintain their appearance for much longer than newer replacement windows.

The first step to repair sash window damage is to fix weather stripping, which can be found on both the sash as well as the frame. It can cause drafts if worn out or loose. Begin by identifying the window brand and the manufacturer's date (etched on the glass's corners, or the aluminum spacers between panes). Then, remove the sash and mark its width and height, so you can find replacement weather stripping to match.

Then, remove the sash and set it on a table so you can access all four sides. If your sash has a double-hung, you'll have to remove the weights and the ropes that go with them that should have fallen into the pocket of the jamb liner. Once you've removed the sash using a utility knife, you can use it to remove the weather stripping from the corners. Then, remove it by hand or using a putty blade.

After the sash has been cleared and clean, you can put in the parting stops. They are long pieces of wood that separate the two sashes. Pam prefers to use standard 1/2-inch by 3/4-inch window trimming from the lumberyard. However, you can also use with a scrap piece of wood.


After removing the stoppers for parting and trimming them to your desired length then apply a thin layer of glazing compound over the bottom of the sash. Smooth the compound using your putty tool, and let it dry for at least a day. Once it's fully cured, apply a top coat of acrylic latex paint. This will help protect the putty and give your sash an updated appearance.

Sash Hardware

The hardware that supports the window sashes may wear out over time and with use. This can result in the window or door that is difficult to open or close. The good thing is that fixing and replacing this hardware is typically very simple and cost-effective. If you're having trouble opening a sash, spray some oil into the jamb channel. Then slide the sash up and open to see if that fixes the problem. If the issue persists it's most likely to be due to the sash's balance. You will need to remove the window sash in order to reach this hardware.

Window sashes should be able to open and close with minimal effort. However, this may be a challenge if the weights have been worn out or the sash-to-rail connecting rail isn't glazed. This issue could be caused by a variety of factors, including lack of maintenance or by an incorrect weight rating for the specific sash.

If the hinge arms of a window begin to slide, this could cause the sash to drag and eventually strike the frame in the corner in the opposite direction of the hinge arm (Photo 1). To correct the issue ensure that the sash is in the proper position within the frame opening, and then take it off. If the sash has been attached to the hinge arm, remove the hinge and replace it. (Photo 2). Then, put in the new sash (Photo 3).

Old windows, especially those in older houses, can be difficult to open and close, due to sagging hinges and general lack of energy efficiency. Many times, a few simple fixes can help these windows function smoothly again and help homeowners save money on energy costs.

To make these repairs to sash, it's important to have all of the necessary tools lined up before you begin. Mark the hinge channel location on the frame (Photo 1) using a pencil. This will assist you in getting the channel back in place correctly when you're finished. Remove the sash and take out all the hardware, including the parting beads, cords, and chains that help to hold the sash. Soften any hardened putty using a heat gun set to medium and fitted with a nozzle shield. Take off the old sash and store it in a bag labeled.

Sash Weights

Sash weights can be changed to enhance the efficiency of your window sash, and also reduce the cost of energy. Sash weights consist of iron or lead cylinders that are encased in a concealed cavity and connected by a rope to the movable window sash. These weights provide counterbalance which allows the window to be closed and opened without using mechanical or electrical devices. If they fail, sashweights are often ignored or disabled by homeowners.

A sash weight that has fallen out of the cavity is difficult to retrieve, so you will want to find a replacement that fits properly. You will also need a new piece of string, a length the sash cord, as well as some sash pulleys to connect the new sash weights to the sash cord.

Mortise and Tenon joints are used to join older wood windows. Pin punch and hammer can be used to take out the wood pegs holding the parts together. The majority of them have large diameters on one side and a smaller one on the other side, so it is crucial to take out the smaller-diameter ones first. Sashes that were made later in the century made use of glue instead of pegs and can be separated by cutting the glue line with a knife, then tapping the mortised section loose using a mallet.

After the sash is removed, you can remove the sash stop and access the weight pocket. Usually it is done by drilling an opening in the bottom of each jamb. This hole is covered with an unfinished wooden panel that can be removed to reveal the inside workings.

Once the sash is stopped and the access panel has been removed, you can remove the weight you used and replace it. Weigh the sash first to ensure that the weights you have may not be the correct size. Once the new weight is installed you can tie a string around it and thread it through the sash pulley. Then, attach the string to your boxed frame. Leave a few inches at the end of the string for future adjustments.

Sash Cords

In most old double-hung window the chain or cord is attached to the weights. This keeps the sashes within the jamb balanced. Over time, these chains may become damaged and render it impossible to raise windows. A new sash cable will restore the ability to move and lower the sash and keep it in place when opened.

The first step to replace sash cords is to locate and remove the access panels in the jambs. These are usually fixed or screwed in and must be removed or moved. It is possible to remove them using an axe or hammer, but it is always best to lay out dust sheets prior to beginning any work.

After removing the access panel, you can begin working on the sash. Utilize a flat bar, or chisel, to pry the narrow parting beads from their grooves. These are often wedged in or nailed but can be removed, so it's worth taking your time here. If the sash is still in place, pry the mortise-and-tenon joints out with a screwdriver or hammer and then take out each wood peg. The sash should be able to move freely, however it might require some lubrication to feel less stiff.

With the sash open Take a measurement of the sash chain to reach from the pulley on the top of the jamb to the sash slot on the bottom. Cut the cord/chain, and then attach it as described in the previous step. You can use a hammer and screws or nails, but nails are less likely to cause damage.

It's best to leave the original weights if you have purchased a kit that will replace the old counterbalance. They are not expensive and simple to install if purchased them at architectural salvage stores. Depending on the size of your window two or three sash weights could be needed to keep it in an open position.

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