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Window Sash Repairs

Window sashes need to be inspected regularly for signs of mold, mildew, and damage. By catching problems before they become serious you will save money on future repairs.

The sash is an interior framing that moves vertically up or down in windows that open. This article will demonstrate how to do a variety of simple repairs to the sash.

Weather Stripping

Wood window sashes add a classic aesthetic to your home and, when properly maintained, they can last for years. However, they can be damaged or degraded over time due to exposure or normal wear. Sash repair experts can restore windows to their original condition and keep them looking great much longer than replacement windows.

The first step for sash window repairs is addressing weather stripping, which can be found on both the sash and frame. If it's loose or worn out, it can cause drafts and other problems. Begin 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). Remove the sash, and mark its size and width so that you can find a replacement weather stripping that matches.

Then, take it off and set it on a work surface so you can access all four sides. If your sash has been double-hung, you must remove the weights using their ropes that should fall into the pocket inside the jamb lining. Once you've taken the sash off using a utility knife, you can use it to cut away the weather stripping from the corners, then take it off by hand or with a putty knife.

Once the sash has been cleared, you can install parting stops. These are long pieces that divide the sashes. Pam prefers the standard 1/2-inch by 3/4-inch window trim from the lumberyard. However, you could substitute with a scrap piece of wood.

After removing the parting stops and trimming them to your desired length, apply a thin layer of glazing compound over the bottom of the sash. Smooth out the compound using your putty knife and let it dry for a minimum of a day. Once the putty has fully cure it is possible to apply an acrylic latex topcoat. This will protect the putty and give your sash an updated appearance.

Sash Hardware

The hardware that holds window repairs sashes is susceptible to wear and tear due to the wear and tear of use and the result could be a door or window that won't open or close easily. It's a good idea to know that replacing and repairing this hardware is often easy and affordable. If you are having trouble opening the sash, spray some grease into the jamb channel. Then slide the sash open to see if this resolves the problem. If the issue persists it's likely that the sash balance is off. You will need to remove the window sash in order to access the hardware.

The ideal situation is for window sashes to be able to open and close with very little effort, but this can be difficult when the weights wear out or if the sash that joins rail isn't properly coated. This issue could be caused by many factors such as a lack of maintenance and a mismatched weight rating.

If the hinge arms on windows begin to slide, this could cause the sash to drag and then hit the frame in the opposite corner (Photo 1). To remedy the issue make sure 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, unbolt the hinge and replace it. (Photo 2). Install the new sash next (Photo 3).

Due to hinges that are sagging, and a general deficiency in energy efficiency, old windows, especially those in older houses, could be difficult to open and close. In most instances, a few minor repairs can transform these windows into smooth operators again and save the homeowner cash on energy costs.

It is crucial to have the tools needed before you begin. Mark the hinge channel location on the frame (Photo 1) using pencil. This will make it easier to place the channel in the right place when you are finished. Then, remove the sash and take off the hardware including the parting beads (Photo 2) and the cords or chains which hold it in place. Soften any hardened putty with the help of a heat gun set at medium and fitted with an nozzle shield. Remove the old sash and put it in a bag labeled.

Sash Weights

Whether your window sash repairs are to replace a damaged cord or to ensure that the windows are functional, replacing worn out sash weights will improve sash operation and reduce the energy cost. Sash weights are made of heavy lead or iron cylindricals that are contained inside a concealed cavity, and attached by ropes to the movable window sash. They provide counterbalance that allows the window to be closed and opened without using mechanical or electrical devices. The sash weights are often disregarded or disabled by homeowners and turned into scrap when they break; therefore you may have to search for replacements.

A weight from a sash that fell out of the cavity is difficult to recover and you'll need to find a replacement that fits correctly. You will also require a new piece of string, a length sash cord and some sash pulleys to tie the new sash weights onto the sash cord.

Older windows made of wood are joined using mortise and tenon joints. The wood pegs holding the parts together can be removed by the use of a pin punch and hammer. The majority of these pegs are big on one side and smaller on the other. It is crucial to first remove the smaller diameter sides. Later sashes used glue instead of pins. They can be cut by using a knife and a mallet.

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 done through an opening at the bottom of each jamb. This hole is then covered by an access panel made of wood that can be ripped off so that you can view the inside of the frame.

After the sash has been stopped and the access panel is removed, you can take off the old weight and replace it. Make sure you weigh the sash prior to you begin, as the weights that were previously used may be different in size from what is needed. After the new weight is installed, you can thread the string through the sash pulling mechanism. Then, you can nail the string to the boxed frame, but leave a few inches of string hanging from the head for future adjustments.

Sash Cords

In the majority of old double-hung windows the chain or cord is affixed to the weights. This keeps the sashes within the jamb level. Over time, these chains can get damaged and make it difficult to raise the windows. A new sash cord will restore the ability to move the sash up and down and hold it in position when it is opened.

To replace sash cords the first step is to remove the access panels from the jambs. They are typically fixed or screwed in and will need to be removed or repositioned. You might be able to use a hammer and chisel to prise them off, but it's always better to lay down dust sheets prior to commencing any work.

After you have removed the access panel, you are able to begin to work on the sash. Utilize a flat bar, or chisel to pull the narrow parting beads out of their grooves. It's important to take your time as they're often wedged or nailed in place. If the sash is still in place, pull the mortise-and-tenon joints out using a hammer or screwdriver and then take out each wood peg. The sash should be able to move around freely now, however it might require some lubrication in order to feel less stiff.

Determine the length of sash cord/chain required to reach the sash slot on the bottom of the pulley located at the top of the jamb. Cut the chain or cord and secure it in the step 6 above. You can employ a hammer and screws or nails, but nails are less likely to cause damage.

It's best to leave the weights that came with the original counterbalance unless you've purchased a kit to replace the old counterbalance. They're not expensive and are easy to install if purchased them from salvage shops for architectural use. Depending on the size and shape of your window, you may require one or two sashweights in order to keep it open.