15 Interesting Facts About Window Sash Repairs That You Never Knew Window Sash Repairs

Window sashes need to be inspected regularly for signs of mold, mildew and other damage. You can save the cost of repairs in the future by catching these issues early on before they become out of control.

The sash is an interior framing that moves vertically either up or down in windows that are open. This article will show you how to make several simple repairs to sash.

Weather Stripping

Wooden window sashes are a great way to add an elegant appearance to your home. They are also durable and can last many years if they are properly maintained. However, they can become damaged or deteriorate as time passes because of exposure to the elements and wear and tear. Fortunately, sash repair specialists can restore your windows to their original condition and keep them looking great for much longer than newer replacement windows.

The first step to sash window repairs is addressing weather stripping, which can be found on both the sash as well as the frame. If it's damaged or worn out, it can lead to drafts and other issues. Start by identifying the brand of window and the date of manufacture for the glass (etched on the glass's corner, or the aluminum spacers between panes). Take the sash off, and mark its size and width so that you can find a new weather stripping that is compatible with the original.

Then, remove the sash from its holder, and place it on a flat surface to allow you to see all four sides. If your sash has a double-hung, you'll also need to remove the weights and their ropes which should have slipped into the pocket of the jamb liner. Once you've removed the sash and the weights, use a utility knife to cut away the old weather stripping at 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. These are long pieces wood that are used to separate the two sashes. Pam prefers the standard 1/2-inch by 3/4-inch window trimming from the lumberyard. But, you can also use for a scrap piece of lumber.

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

Sash Hardware

The hardware that supports window sashes susceptible to wear and tear due to the wear and tear of use, and the result can be a door or window that can't be opened or closed easily. It's a good idea to know that replacing and fixing this hardware is usually simple and inexpensive. If you're having trouble opening a sash, spray some grease into the jamb channel. Then slide the sash open to see if it resolves the problem. If not, the issue is likely with the sash balance, and you'll need to remove the sash to gain access to this hardware.

Ideally, window sashes must move open and shut without effort, however, this can be difficult if the weights become worn or if the sash that joins rail isn't properly coated. This issue can be caused by a variety of factors, including insufficient maintenance or an incorrect weight rating for a particular sash.

If the hinge arms on a window begin to sag this can cause the sash drag, and then eventually to hit the frame in the opposite corner (Photo 1). To correct the issue ensure that the sash is aligned in the frame's opening and take it off. If the sash was fixed to the hinge arm, unbolt the hinge and replace it. (Photo 2). Then, put in the new sash (Photo 3).

Due to sagging hinges, and a general deficiency in energy efficiency, windows that are old, especially those in older houses, could be difficult to open or close. Sometimes just a few easy fixes can allow these windows to operate smoothly again and help homeowners save money on energy bills.

It is essential to have the tools you require before you start. Begin by marking the location of the hinge channel on the frame using a pencil (Photo 1). This will make it easier to position the channel in the proper position after you've finished. Remove the sash and remove the hardware, including the parting beads (Photo 2) and the chains or cords which hold it in place. Soften any hardened putty with an electric heat gun set to medium and equipped with a shield to block the nozzle. Take off the old sash and store it in an bag that is labeled.

Sash Weights

No matter if your window sash repair needs are to replace a damaged cord or to keep your windows functioning and functional, replacing worn-out weights on sash can improve sash operation and cut down on the energy cost. Sash weights consist of iron or lead cylindricals that are contained in a hidden cavity and are connected via ropes to the moveable window sash. They are counterbalancers that allows the window to be closed and opened without the use of electrical or mechanical devices. The sash-weights are typically disregarded or disabled by homeowners and then turned into scrap when they fail. Consequently you might need to find replacements.

It is difficult to recover a sash-weight that has fallen from the cavity, so you'll need to find one that fits correctly. You will also require a fresh piece of string, a length sashcord and some sashpulleys to tie the weights you are replacing to the cord.

Mortise and Tenon joints are used to join old wood windows. The wood pegs holding the components together can be removed with the use of a pin punch and hammer. The majority of these pegs are large on one side, and smaller on the other. It is essential to remove first the smaller diameter sides. Sashes that were made later in the century utilized glue instead of pegs and can be separated by cutting through the glue line with a knife, then tapping the mortised section loose using a mallet.

Once the sash has been released, you can remove the sash stops and access the weight pockets. This is typically done by drilling a small hole at the bottom of each jamb. This hole is then covered by an access panel of wood that can be cut off to allow you to observe the inner workings of the frame.

After the sash has been stopped and the access panel has been removed, you are able to remove the weight you used and replace it. Be sure to weigh the sash before you begin, as the old weights could be different in size from what you require. After the new weight is in place, tie a string to it and then thread it through the sash pulley. Then nail the string to the frame, but only leave a few inches of string sticking out from the head to allow for future adjustments.

Sash Cords

In the majority of double-hung windows, a chain or cord is affixed to the weights. This supports and keeps the sashes within the jamb level. As time passes, these cords can get damaged and make it impossible to raise the windows. A new sash cable will give you the ability to move and lower the sash, and keep it in position when opened.

The first step to replace sash cords is to find and remove the access panels within the jambs. These are usually fixed or screwed in and will require to be removed or repositioned. It may be possible to remove them with an axe or hammer, but it is always better to lay out dust sheets prior to starting any work.

Once the access panel is removed, you can start working on the sash. Utilize a flat bar or chisel to pull the narrow parting beads out of their grooves. It is important to take your time because they are usually placed in a wedge or nail. If the sash is in place, remove the mortise and tenon joints using pin punch and hammer or screwdriver, then remove the wood pegs that are on the components. You should now be able to move the sash back and forth freely, although it will probably need some oiling if it seems stiff.


Measure the length of sash chain/sash cord required to reach the sash slot on the bottom from the pulley on the top of the jamb. Cut the cord/chain, and then attach it as described in the step 6 above. You can either use a hammer and nail or screws, but nails are less likely to cause damage.

It is recommended to keep the original weights if you have purchased a kit to replace the old counterbalance. They're not costly and easy to install if you buy them at architectural salvage stores. Depending on the size of your window two or three sash weights might be required to keep it in an open position.