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8 Tips To Improve Your Window Sash Repairs Game
Window Sash Repairs

Window sashes must be regularly checked for mold, mildew, and damage. If you catch these issues early, you can save money on repairs in the future.

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 do simple repairs to sash.

Weather Stripping

Wooden window sashes can add a classic look to your home. They are also sturdy and will last for many years provided they are properly maintained. However, they can be damaged or degrade as time passes because of exposure to the elements and normal wear and wear and tear. Sash repair specialists can restore windows to their original condition and keep them looking great longer than 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. It can cause drafts if it's damaged or is loose. To fix it, begin by determining the brand of your window and glass manufacturer date (etched in the corner of the glass or on the aluminum spacer between panes). Then, take the sash off and mark its height and width so that you can locate new weather stripping that matches.

Then, take the sash from the holder and place it on flat surfaces to allow you to see all four sides. If the sash is double-hung, you'll also need to remove the weights and their accompanying ropes that should have fallen into the intended pocket in the jamb liner. Once you've removed the sash and the weights, use a utility knife to cut off the weather stripping from the corners, then remove it manually or with a putty knife.

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

After removing the stopper and trimming it to length and then apply a thin layer of glazing compound on the bottom of the sash. Smooth it out using your putty knife, then let it dry for at least a few days. After the putty has completely cured, you can apply a topcoat of acrylic latex. This will help protect the putty, and give your sash an updated appearance.

Sash Hardware

The hardware that holds window sashes is susceptible to wear and tear due to age and use, and the result can be a window or door that isn't able to open or close easily. The good news is that fixing and replacing this hardware is typically quite simple and inexpensive. If you are having trouble opening a sash, spray some oil into the jamb channel. Then, slide the sash up and open to see if it resolves the problem. If not, the issue is likely with the balance of the sash and you'll have to take off the sash to access the hardware.

Sashes for windows should be able to open and close without much effort. However, this can be difficult if the weights are worn out or the sash-to rail connecting rail isn't glazed. This can be due to many factors, including the lack of maintenance or an unmatched weight rating.

If the hinge arms of a window begin to slide, this could cause the sash to slide and eventually hit the frame in the corner that's in the opposite direction of the hinge arm (Photo 1). To fix the problem make sure the sash is aligned in the frame opening and then remove it. If the sash is screwed onto the hinge arm, remove the hinge and replace it. (Photo 2). Install the new sash next (Photo 3).

Due to sagging hinges, and a general lack of energy efficiency, older windows particularly those in older homes, can be difficult to open and close. In many cases, a few simple fixes can make these windows operate smoothly again and help homeowners save money on their energy bills.

It is essential to have the tools you require before you start. Mark the hinge channel's location on the frame (Photo 1) with pencil. This will help you get the channel back into place correctly when you're finished. Remove the sash, and then remove the hardware including the beads that separate (Photo 2) and the cords or chains that secure it. Soften any hardened putty using a heat gun set to medium and fitted with a shield to block the nozzle. Remove the old sash and store it in a bag with a label.

Sash Weights

Sash weights can be replaced to enhance the efficiency of your window sash, and also reduce energy costs. Sash weights are composed of heavy lead or iron cylinders that are enclosed inside a concealed cavity, and are connected via a rope to the movable window sash. They are counterbalancers that allows the window to be opened and closed without the need for mechanical or electrical devices. The sash-weights are typically disregarded or disabled by homeowners, and are turned into scrap when they fail. Consequently, you may need to find replacements.


It's not easy to retrieve an sash-weight which has fallen from the cavity, so you'll need to find one that fits properly. You will also need a new piece of string, a length sash cord, and a few sash pulleys to tie the new sash weights the sash cord.

Mortise and Tenon joints can be used to join older wood windows. Hammers and pins can be used to take out the wood pegs that hold the components together. The majority of these pegs have a large diameter on one side and a smaller one on the other, which is why it is essential to remove the small-diameter sides first. Sashes made later in the century made use of glue instead of pegs and can be separated by cutting through the glue line with an instrument, and then tapping the mortised area loose with mallets.

Once the sash has been removed, you can take off the stops on the sash and get access to the pockets for weights. Usually this is accomplished by drilling an opening at the bottom of each jamb. This hole is covered with an unfinished wooden panel that can be removed to reveal the inner workings.

After the sash has been stopped and the access panel is removed, you are able to remove the weight that was previously installed and replace it. First, weigh the sash, as the weights you have might not be of the right size. After the new weight is in place then tie a string to it and then thread it through the sash pulley. Then nail clicking here to the frame, leaving a few inches of string sticking out from the head for future adjustment.

Sash Cords

In the majority of double-hung windows, a chain or cord is connected to the weights. This helps keep the sashes within the jamb level. As time passes, these cords can become damaged and render it impossible to raise the windows. A new sash cable can restore the ability to raise and lower the sash, and keep it in position when opened.

The first step in replacing sash cords is to locate and take out the access panels located in the jambs. These are usually screwed or nailed into and require removal. It is possible to take them out using an axe or hammer, however, it is best to lay out dust sheets prior to starting any work.

After you have removed the access panel, you are able to begin working on the sash. Utilize a flat bar or chisel to pull the narrow partsing beads out of their grooves. It's important to be patient, as these are often placed in a wedge or nail. If the sash is still in place, pry the mortise and tenon joints free with a screwdriver or hammer and then take out each wood peg. The sash should be able move around freely now, however it might require some lubrication to make it feel less stiff.

With the sash in an open position, measure enough sash cord/chain to reach from the pulley at the top of the jamb to the sash slot on the bottom. Cut the chain or cord and secure it as in the previous step. You can use a hammer, nails or screws. However nails are less likely than screws to cause damage.

If you haven't purchased an upgrade kit to replace the old counterbalance system it's recommended to keep the original weights for balancing in place. They are not expensive and are easy to install if you buy them from salvage shops for architectural use. Depending on the size of your window one or two sashweights could be needed to keep it open.

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