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Window Sash Repairs 101: The Ultimate Guide For Beginners
Window Sash Repairs

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

The sash is an interior framing that can be moved vertically upwards or downwards in windows that are open. This article will show you how to perform easy repairs to your sash.

Weather Stripping

Wood window sashes give an elegant look to your home. When properly maintained, can last for a long time. However, they can be damaged or degrade as time passes due to exposure to elements and normal wear and tear. Sash repair experts can restore windows to their original condition and maintain their beauty longer than replacement windows.

The first step for sash window repairs is addressing weather stripping, which is found on both the sash as well as the frame. If it's worn or loose, out, it can cause drafts and other problems. Start by identifying the window's brand and the glass manufacturer's date (etched on the glass's corners or on the aluminum spacers between panes). Then, take the sash off and mark its width and height to find the appropriate weather stripping replacement to match.

Then, remove the sash from its holder, and place it on a flat surface to allow you to reach all four sides. If your sash is double-hung, you'll need to take off the weights and their accompanying ropes which should have slipped into the intended pocket in the jamb liner. After you've removed the sash using a utility knife, you can use it to remove the weather stripping that was formerly in place at the corners, then remove it manually or using a putty blade.

After the sash has been cleared, you can install 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 trimmings from the lumberyard. But, you can also substitute a scrap piece of wood.

After removing the parting stop and trimming it to length and then apply a thin layer of glazing compound over the bottom of the sash. Smooth the compound using a putty knife, and let it dry for at least one day. When the putty is fully cure, 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 supports windows sashes can become worn out over time and use. This could lead to the window or door that is difficult to open or close. It's important to know that replacing and fixing this hardware is usually easy and affordable. If a sash is difficult to operate you can try spraying some grease into the jamb channel, and then open it to see if it solves the issue. If the problem persists it's likely the sash balance. You'll need to take off the window sash to get access to this part of the hardware.

The ideal situation is for window sashes to be able to open and close without effort, but this is difficult if the weights become worn or if the sash that joins rail isn't properly coated. visit my web site can be due to various reasons, including the lack of maintenance or an unmatched weight rating.

If the hinges on windows begin to slide, this could cause the sash to drag, and then eventually to hit the frame in the opposite corner (Photo 1). To remedy the issue, make sure that the sash is aligned in the frame opening, and then remove it. If the sash has been fixed to the hinge arm, remove the hinge and replace it. (Photo 2). Install the new sash next (Photo 3).

Old windows, particularly those in older houses, can be difficult to open and close due to sagging hinges and a general inefficiency. Many times it is a matter of making a few minor adjustments that can make these windows operate smoothly once more and save homeowners money on energy costs.

In order to make these sash repairs it is essential to have all the necessary tools in place before you begin. Begin by marking the location of the hinge channel on the frame with pencil (Photo 1). This will make it easier to put the channel in the right location after you've completed. Remove the sash and take out all the hardware, including the parting beads, cords, and chains that help to hold the sash. Soften any putty that has been hardened with a heat gun set to medium and fitted with a shield to block the nozzle. Remove the old sash and put it in a bag that is labeled.

Sash Weights

If your window sash repairs are to replace a damaged cord or to keep the windows functional, replacing worn out weights on sash can improve sash operation and help reduce energy consumption. Sash weights are hefty lead or iron cylinders that are enclosed in a hidden cavity and connected to the movable sash by a rope. They provide counterbalance that allows the window to be shut and opened without the need for mechanical or electrical devices. The sash weights are usually ignored or discarded by homeowners and then turned into scrap when they fail; therefore you may have to locate replacements.

A weight from a sash that fell out of the cavity is difficult to retrieve and you'll need to find a new one that fits properly. You will also require a new piece string, a length of sashcord and a few sashpulleys for tying the weights you are replacing to the cord.

Older windows made of wood are joined with mortise and tenon joints. Pin punch and hammer can be used to cut off the wood pegs holding the parts together. Most of them have a large diameter on one side and a smaller diameter on the other side, so it is important to remove the small-diameter sides first. Sashes that were made later in the century made use of glue instead of pegs and can be separated by cutting through the glue line using the help of a knife, and then tapping the mortised section loose with a mallet.


After the sash is released, you can remove sash stops and gain access to the pockets for weights. This is usually done through a small hole at the bottom of each jamb. The hole is then covered with an access panel of wood which can be removed to let you observe the inner workings of the frame.

When the sash has been shut off and the access panel has been removed, you are able to remove the weight that was previously installed and replace it. Make sure you weigh the sash prior to you begin, as the old weights may be different in size from the one you need. After the new weight has been installed, you can thread a string through the sash pulling mechanism. Then, attach the string to your boxed frame. Leave a few inches at the head of the string for future adjustments.

Sash Cords

The majority of double-hung windows with a history include a chain or cord attached to the weights that helps keep the sashes level within the jamb. As time passes, these cords can become damaged and render it impossible to raise the windows. A new sash cable will restore the ability to raise and lower the sash, and keep it in place when opened.

The first step in replacing sash cords is to find and take out the access panels located in the jambs. They are usually installed by screws or nails and will need to be removed or relocated. You could use a hammer and chisel for removing them but it's best to lay down dust sheets before starting any work.

After removing the access panel, you can begin to work on the sash. Take the narrow beads (also called "tie rails") out of their grooves with flat bar or chisel. They are typically wedged into or nailed but can be prised free, so it's worth taking your time. If the sash is in place, break the mortise and tenon joints with a hammer and pin punch or screwdriver, then unhook the wood pegs that are on the components. It should now be possible to move the sash back and forth without difficulty, though it will probably need some oiling if it seems 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 in the bottom. Cut the chain or cord, and then fix it using Step 6 above. You can do this with a hammer, nails or screws. However nails are less likely to cause damage.

If you haven't purchased a kit that replaces the counterbalance system that was in place before, it's best to keep the original balancing weights in place. They're not expensive and are easy to install if you buy them from salvage shops for architectural use. Depending on the dimensions and shape of your window you might need to install one or two sashweights to keep the sash open.

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