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Window Sash Repairs

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

The sash is an interior framing that can be moved vertically upwards or downwards in windows that open. This article will teach you how to carry out a few simple repairs to sash.

Weather Stripping

Wooden window sashes can add an elegant look to your home. They are also durable and can last many years provided they are properly maintained. They can, however, get damaged or deteriorated over time due to exposure or normal wear. Sash repair experts can restore windows to their original condition and maintain their beauty 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. If it's loose or worn out, it can cause drafts, as well as other issues. To fix it, start by finding your window brand and the date on which the glass was manufactured (etched in the corner of the glass or on the aluminum spacer between panes). Then, take the sash off and mark its width and height to find replacement weather stripping to match.

Then, remove the sash and set it on a surface to allow access to all four sides. If your sash has a double glazing window repair-hung, you'll have to remove the weights and their ropes, which should have fallen into the intended pocket in the jamb liner. After removing the sash using the utility knife, remove the weather stripping that was left by hand or with the putty blade.

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

After removing the stopper and trimming it to length after which, apply a thin layer of glazing compound to the bottom of the sash. Smooth the compound with your putty tool, and let it dry for at least a day. Once it's fully cured then apply a top coat of acrylic latex paint. This will protect the putty and give your sash a fresh look.

Sash Hardware

The hardware that holds the window sashes may wear out over time and with use. This could result in a door or a window that is difficult to open or close. It's important to know that replacing and fixing this hardware is usually simple and inexpensive. If a sash becomes difficult to operate you can try spraying some lubrication into the jamb channel and then open it to see if this solves the issue. If the issue continues it's likely the sash balance. You'll need remove the window sash to access the hardware.

The ideal situation is for window sashes to be able to open and close without effort, but this is difficult when the weights are worn or if the sash meeting rail isn't properly coated. This could be caused by a variety of factors, including an absence of maintenance or an unmatched weight rating.

If the hinges on a window begin to sag this could cause the sash to drag and eventually hit against the frame at the opposite corner (Photo 1). To fix this problem, first ensure that the sash is firmly seated in the frame's opening and then take it out of the window. If the sash is secured to the hinge arm, you'll need to remove the hinge arm and replace it (Photo 2). Install the new sash (Photo 3).

Windows that are old, especially in older homes, may be difficult to open and close, due to sagging hinges and an overall inefficiency. Sometimes just a few easy fixes can allow these windows to operate smoothly once more and save homeowners money on energy bills.

To complete these repairs to the sash, it's important to have all the necessary tools lined up before you begin. Begin by marking the position of the hinge channel on the frame using a pencil (Photo 1). This will help you get the channel back in position correctly after you've completed. Remove the sash and take out all the hardware, including the parting beads, cords, and chains that keep the sash in place. Soften any hardened putty using a heat gun set to medium and equipped with an shield to block the nozzle. Remove the old sash and put it in a bag with a label.

Sash Weights

If your window sash repairs are to replace a broken cord or to keep your windows functioning, replacing worn out weights for sash will improve its operation and cut down on energy consumption. Sash weights are made of heavy iron or lead cylindricals that are contained inside a concealed cavity, and are connected via ropes to the moveable window sash. These weights act as counterbalances, which allows you to open and close the window without the need for mechanical or electrical devices. When they fail, sashweights tend to be neglected or not used by homeowners.

A sash weight that has fallen out of the cavity is difficult to get back and you'll need to find a replacement that fits correctly. You will also require a fresh piece of string, a length sashcord and a few sashpulleys for tying the new weights to the cord.

Older wood windows are joined using mortise and tenon joints. Hammers and pins can be used to remove the wood pegs that hold the components together. Most of these pegs have large diameters on one side and a smaller size on the other, so it is crucial to take out the smaller-diameter ones first. Sashes that were made later in the century used glue instead of pegs. They can be separated by cutting the glue line using an instrument, and then tapping the mortised part loose with a mallet.

Once the sash has been removed, you can take off the sash stops and gain access to the pockets for weights. This is usually done through tiny holes in the bottom of each jamb. The hole is then covered with the wooden panel which can be removed to reveal the inside workings.

Once you have the sash stopped and the access panel removed, you'll be able to take off the weight from the sash and replace it with the new. Weigh the sash first, as the weights you have might not be the right size. Once the new weight is installed you can tie a string around it and then thread it through the pulley for the sash. Then, you can nail the string to the frame, leaving a few inches of string hanging from the head to allow for future adjustments.

Sash Cords

In most old double-hung window, a cord or chain is attached to the weights. This supports and keeps the sashes in the jamb level. Over time, these cords can get damaged and make it difficult to raise windows. A new sash cord can restore the ability to move the sash up and down and will keep it in its place when it is opened.

To replace sash cords the first step is to remove the access panels from the jambs. These are usually screwed or nailed into and require removal. It may be possible to remove them using the hammer or chisel but it is always best to lay out dust sheets before beginning any work.

After you have removed the access panel, window sash repairs you are able to begin to work on the sash. Use a flat bar or chisel, to pry the tiny partsing beads out of their grooves. These are often wedged in or nailed in, but they can be removed and it's worth your time. If the sash is in place, pry out the mortise and tenon joints using a hammer and pin punch or screwdriver, and then take out the wood pegs on each piece. You should be able to move the sash around freely, although it may require oil if it feels stiff.

Determine the length of sash chain/sash cord needed to reach the sash slot on the bottom of the pulley on the top of the jamb. Cut the cord or chain and fix it as described in the previous step. You can do this with a hammer, nails or screws. However, nails are less likely to cause damage.

If you haven't purchased an item that replaces the old counterbalance system, it is recommended to keep the original balancing weights in place. They are not expensive and simple to install if you buy them from architectural salvage stores. Based on the size of your window, one or two sash weights could be needed to keep it open.