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Window Sash Repairs

Check the windows sashes regularly for damage, mildew, and mold. You can save future repair costs by catching the issues early on, before they become too much.

The sash is the internal framing that can be moved vertically up or down in windows that are open. This article will show you how to make several simple sash repairs.

Weather Stripping

Wooden window sashes can give a classic look to your home. They are also sturdy and last for a long time when they are maintained properly. However, they may become damaged or degraded in time due to exposure to elements and wear and wear and tear. Thankfully, sash repair experts can restore your windows to their original condition and keep them looking great for a longer period of time 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 damaged or is loose. Start by identifying the window's brand and the date of manufacture for the glass (etched on the glass's corners or 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, take it off and place it on a work surface so you can access all four sides. If your sash is double-hung, you'll also need to remove the weights and the ropes that go with them which should have slipped into the pocket that was intended to be in the jamb liner. Once you've taken the sash off and the weights, use a utility knife to cut off the weather stripping from the corners. Then, remove it by hand or using a putty blade.

Once the sash is clear, you can replace the parting stops. These are long pieces of wood that divide the two sashes. Pam likes to replace these with standard 1/2-inch-by 3/4-inch window trim from the lumberyard. However, you could also use scrap wood.

After removing the parting stops and trimming them to the desired length, apply a thin layer of glazing compound over the bottom of the sash. Smooth the compound using a putty tool and let it dry at least a day. After the putty has completely cured, you can apply an acrylic latex topcoat. This will protect the putty and give your sash a fresh appearance.

Sash Hardware

The hardware that supports window sashes susceptible to wear and tear due to time and usage and the result could be a window or door that can't be opened or closed easily. The good thing is that fixing and replacing this hardware is generally relatively easy and affordable. If a sash is difficult to operate, try spraying some lubrication into the jamb channel, and then open it to see if that resolves the issue. If the issue continues it's likely that the sash balance is off. You will need remove the window sash in order to get access to this part of the hardware.

Ideally, window sashes must swing open and closed with minimal effort but this can be difficult when the weights are worn or if the sash's meeting rail isn't properly glazed. This could be caused by various reasons such as the lack of maintenance or a mismatched weight rating.

If the hinge arms of a window repairs are beginning to sag, this can cause the sash to slide and eventually land on the frame in the corner in the opposite direction of the hinge arm (Photo 1). To address this problem, first ensure that the sash fits squarely in the opening of the frame and then take it out of the window. If the sash is screwed to the hinge arm, you'll have to unscrew the hinge arm and replace it (Photo 2). Then, put in the new sash (Photo 3).

Old windows, particularly those in older homes, may be difficult to open and close due to hinges that are sagging and general lack of energy efficiency. Many times just a few easy fixes can allow these windows to operate smoothly and save homeowners money on energy costs.

It is important to have the tools needed before you begin. Begin by marking the position of the hinge channel on the frame with a pencil (Photo 1). This will allow you to position the channel in the correct place when you are finished. Take the sash off, and remove all the hardware including the parting beads, cords, and chains that help to hold the sash. A hot gun with nozzle shield and medium setting will soften any putty that has been hardened. Remove the old sash, and put it in a bag with a label.

Sash Weights

Sash weights can be changed to improve the performance of your window sash and decrease the energy cost. Sash weights are hefty lead or iron cylinders that are enclosed in a hidden cavity and connected to the movable the sash with a rope. They are counterbalancers, allowing the window to be shut and opened without the need for mechanical or window repairs electrical devices. If they fail, sashweights tend to be ignored or disabled by homeowners.

It's not easy to retrieve the sash-weight that fell from the cavity, so you'll want to find one that fits properly. You will also require a new piece of string, a length sashcord and a few sashpulleys to secure the new weights to the cord.

Mortise and Tenon joints can be used to join windows made of older wood. Hammers and pins can be used to remove the wood pegs holding the components together. The majority of these pegs are big on one side, but smaller on the other. It is crucial to remove first the smaller diameter sides. Sashes that were made later in the century used glue instead of pegs. They can be separated by cutting the glue line with an instrument, and then tapping the mortised area loose using a mallet.

After the sash is released, you can remove the stops on the sash and get access to the pockets for weights. Usually, this is done through a hole near the bottom of each jamb. The hole is then covered with an access panel made of wood that can be ripped off so that you can see the inner workings of the frame.

Once the sash is stopped and the access panel has been removed, you can take off the weight that was previously installed and replace it. First, weigh the sash, as the weights you've got may not be the right size. After the new weight has been installed, you can thread an appropriate length of string through the pulling mechanism. Then, you can nail the string to the boxed frame, leaving a few inches of string sticking out from the head to allow for future adjustments.

Sash Cords

In most old double-hung window, a chain or cord is attached to the weights. This supports and keeps the sashes in the jamb in a balanced manner. Over time, these cords could break, making it difficult to raise the window. A new sash cord can restore the ability to move the sash up and down and keep it in place when it is opened.

To replace sash cords, the first step is to remove the access panels from the jambs. They are typically screwed or nailed in and must be removed. It may be possible to remove them with an axe or hammer, but it is always better to lay out dust sheets prior to beginning 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 small parting beads out of their grooves. They are usually wedged in or nailed but can be removed, so it's worth taking your time here. If the sash is in place, break the mortise and the tenon joints by using a hammer and pin punch or screwdriver, and then take out 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.

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

It's best to leave the original weights in place unless you've purchased a kit to replace the old counterbalance. It's cheap to purchase them from architectural salvage stores and they'll be easy to install once you've got the sash open. Depending on the dimensions and shape of your window you may require one or two sashweights in order to keep it open.