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Window Sash Repairs

Sashes for windows must be checked regularly for mold, mildew and damage. You can save the cost of repairs in the future by catching these issues early, before they get out of hand.

The sash is an internal frame that is able to move vertically up and down in windows that open. This article will show you how to perform several simple repairs to sash.

Weather Stripping

Wood window repair sashes give an elegant look to your home and, when properly maintained, they will last for years. However, they can be damaged or degrade over time due to exposure to the elements and wear and wear and tear. Fortunately, sash repair specialists 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 in sash window repairs is addressing weather stripping. It's found on both the sash and frame. It can cause drafts if it's worn out or loose. Start by identifying the window's brand and the manufacturer's date (etched on the corner of the glass, or the aluminum spacers between panes). Remove the sash, and mark its width and height so that you can find a new weather stripping that is compatible with the original.

Then, remove the sash and set it on a surface to allow access to all four sides. If the sash is double-hung, you'll have to take off the weights and their ropes that should have fallen into the pocket of the jamb liner. Once you've taken the sash off and the weights, use a utility knife to remove the weather stripping that was formerly in place at the corners. Then, remove it by hand or with a putty knife.

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

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 using a putty tool and let it dry at least one day. Once the putty has fully dried and dried, you can apply an acrylic latex topcoat. This coating will protect the putty and give your sash a new look.

Sash Hardware

The hardware that supports the windows sashes can become worn out over time and use. This could result in a door or a window that is difficult to open or close. The good thing is that fixing and replacing this hardware is usually very simple and cost-effective. If you're having difficulty opening a sash, spray some lubricant into the jamb channel. Then, you can slide the sash up and open to see if it resolves the issue. If not, the issue is most likely due to the balance of the sash and you'll need to remove the sash to access this hardware.

Ideally, window sashes must be able to open and close with minimal effort however, this can be difficult if the weights become worn or if the sash that joins rail isn't properly coated. This issue can be caused by a number of things, such as insufficient maintenance or a mismatched weight rating for the particular sash.

If the hinges on the window begin to move, this can cause the sash drag and eventually hit against the frame in the opposite corner (Photo 1). To resolve this problem, first ensure that the sash fits squarely in the opening of the frame and then remove it from the window repair. If the sash was 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 in energy efficiency, old windows particularly those in older homes, can be difficult to open or close. In most instances, a few minor repairs can turn these windows into smooth operation again and save the homeowner money on energy costs.

In order to make these sash repairs it is essential to have all of the tools needed before you begin. Begin by marking the location of the hinge channel on the frame with pencil (Photo 1). This will allow you to position the channel in the right position after you've finished. Take the sash off, and remove all the hardware, including the parting beads, cords, and chains that hold the sash in place. A hot gun with nozzle shield and a medium setting can soften any hardened putty. Remove the old sash, and store it in an bag with a label.

Sash Weights

Whether your window sash repairs are to replace a broken cord or simply to keep your windows functioning, replacing worn out sash weights will improve sash operation and reduce the energy cost. Sash weights are hefty lead or iron cylinders enclosed inside a hidden compartment and attached to the movable window sash using rope. These weights act as counterbalances, which allows you to open and close the window 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. Consequently you may have to locate replacements.

It's difficult to retrieve an sash-weight which has fallen from the cavity, so you'll want to find one that fits properly. You will also require a new piece string, a length sashcord and some sashpulleys to tie the weights you are replacing to the cord.

Mortise and Tenon joints are used to join windows made of older wood. The wood pegs that keep the components together can be removed by pin punches and hammers. The majority of these pegs are large on one side and smaller on the other. It is essential to remove first the smaller diameter sides. Sashes made later in the century used glue instead of pegs and can be separated by cutting through the glue line with the help of a knife, and then tapping the mortised section loose with mallets.

After the sash is removed then you can take out the sash stop and access the weight pocket. This is usually done through an opening in the bottom of each jamb. The hole is then covered with an access panel of wood that can be cut off to let you view the inside of the frame.

After you have the sash stopped and the access panel removed, you'll be able to remove the weight from the sash and replace it with new. Be sure to weigh the sash before you do this, as the old weights may be different in size from the one you need. After the new weight has been installed, you can thread an appropriate length of string through the pulling mechanism. Then nail the string to the boxed frame, leaving a few inches of string sticking out from the head for future adjustments.

Sash Cords

The majority of double-hung windows with a history have a cord or chain connected to the weights that supports and keeps the sashes balanced within the jamb. Over time, these cords can become damaged and make it difficult to raise windows. A new sash cord will restore the ability to move the sash upwards and downwards and will keep it in its place when it is opened.

The first step to replace sash cords is to locate and remove the access panels in 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 best to lay out dust sheets before beginning any work.

After the access panel has been removed, you can start working on the sash. Prise the narrow parting beads (also known as "tie rails") out of their grooves with a chisel or flat bar. It is important to be patient because they are usually placed in a wedge or nail. If the sash remains in place, pry the mortise-and-tenon joints out with a screwdriver or hammer and then take out each wood peg. The sash should move around freely now, however it might require some lubrication in order to feel less stiff.

With the sash in an open position, measure enough sash cord/chain to reach from the pulley in the top of the jamb to the sash slot in the bottom. Cut the cord or chain and then attach it as described in the step 6 above. You can either employ a hammer, screws or nails, however nails are less likely to cause damage.

It is best to keep the original weights in place unless you've purchased a kit that will replace the counterbalance that was previously installed. It's not too expensive to purchase them from architectural salvage stores and they'll be simple to install once you've got the sash opened. Depending on the size and shape of your window, you may need to use one or two sashweights to keep the sash open.