Window Sash Repairs

Regularly inspect the window sashes for any damage, mildew and mold. By catching problems before they become serious, you can save money on future repairs.

The sash is an interior frame that can move vertically up and down in windows that open. This article will teach you how to do a variety of simple repairs to the sash.

Weather Stripping

Wooden window sashes can give an elegant look to your home. They are also sturdy and last for a long time provided they are properly maintained. However, they can become damaged or degraded with time due to exposure or normal wear and tear. However, sash repair experts can restore your windows back to their original condition and maintain their appearance for longer than replacement windows.

The first step in sash window repairs is addressing weather stripping, which can be found on both the sash as well as the frame. If it's worn or loose, out, it could cause drafts, as well as other issues. Start by identifying the brand of window and the date of manufacture for the glass (etched on the glass's corner or on the aluminum spacers between panes). Then, remove the sash and mark its height and width so that you can locate new weather stripping that matches.

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 also need to remove the weights and the ropes that go with them, which should have fallen into the pocket of the jamb liner. After removing the sash with the utility knife, remove the old weather stripping by hand or with a putty blade.

After the sash has been cleared, you can replace the stoppers that separate the two sashes. These are long pieces that divide the sashes. Pam likes to replace them with standard 1/2-inch by 3/4-inch window trim from the lumberyard. However, you can also replace them with scrap wood.

After removing the stopper for the parting and cutting it to length, apply a thin coat of glazing compound on the bottom of the sash. Smooth it out using your putty knife and let it dry for a minimum of a day. Once the putty has fully cured it is possible to apply a topcoat of acrylic. This coating will protect the putty and give your sash a new appearance.

Sash Hardware

The hardware that supports window sashes is susceptible to wear and tear from age and use, and the result can be a window or door that won't open or close easily. The good news is that repairing and replacing this hardware is generally relatively easy and affordable. If you are having trouble opening the sash, spray some lubricant into the jamb channel. Then, slide the sash open to see if it resolves the problem. If not, the problem is most likely due to the sash balance, and you'll need to take out the sash to access the hardware.

upvc window repair sashes should open and close without much effort. However, this may be a challenge if the weights have been worn out or the sash-to-rail connecting rail isn't properly glazed. This issue can be caused by a number of things, such as the lack of maintenance or an incorrect weight rating for the specific sash.

If the hinge arms 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 address this issue, first make sure the sash fits squarely in the opening of the frame and then take it out of the window. If the sash is secured to the hinge arm, you'll have to remove the hinge arm and replace it (Photo 2). Then, you can install the new sash (Photo 3).

Because of sagging hinges and a general deficiency in energy efficiency, older windows particularly those in older houses, could be difficult to open and close. In many instances, a few minor repairs can turn these windows into smooth operation again and save the homeowner cash on energy costs.

It is important to have the tools you need before you begin. Mark the location of the hinge channel on the frame (Photo 1) using a pencil. This will allow you to put the channel in the right location after you've completed. Take the sash off, and remove all the hardware including the parting beads, cords, and chains that keep the sash in place. A hot gun with nozzle shield and medium setting will soften any hardened putty. Remove the old sash, and put it in a labeled bag.

Sash Weights

Sash weights are able to be replaced to improve the performance of your window sash, and also reduce the energy cost. Sash weights are made of heavy iron or lead cylindricals that are contained inside a concealed cavity, and are connected via ropes to the movable window sash. These weights act as counterbalances, which allows you to open and shut the window without having to use mechanical or electrical devices. The sash weights are often neglected or ignored by homeowners and then turned into scrap when they break; therefore you may have to find replacements.

A sash weight that has fallen out of the cavity is difficult to get back and you'll need to locate a new one that fits correctly. You will also require an additional piece of string, a length the sash cord, as well as some sash pulleys to connect the new sash weights the sash cord.

Mortise and Tenon joints can be used to join old wood windows. Pin punch and hammer can be used to take out the wood pegs holding the parts together. The majority of these pegs have an enormous diameter on one side and a smaller one on the other, so it is important to remove the small-diameter sides first. Later sashes used glue instead of pins. They can be separated with a knife and a mallet.

After the sash has been removed then you can take out the stopper on the sash and get access to the weight pocket. Usually, this is done through an opening at the bottom of each jamb. The hole is surrounded by an unfinished wooden panel that can be removed to reveal the interior workings.

After the sash has been stopped and the access panel is removed, you can remove the old weight and replace it. First, weigh the sash because the weights you have might not be the correct size. After the new weight is installed, tie a string to it and thread it through the sash pulley. Then, nail the string to your boxed frame. Leave a few inches protruding at the head of the string for future adjustments.

Sash Cords

Most double-hung windows of the past have a cord or chain attached to the weights which helps keep the sashes in balance in the jamb. Over time, these cords could break, making it impossible to raise the window. A new sash cord can restore the ability to move the sash up and down and will keep it in its place when opened.

The first step in replacing sash cords is to locate and take out the access panels located in the jambs. They are typically installed by screws or nails and will need to be removed or moved. It may be possible to remove them using the hammer or chisel however, it is best to lay out dust sheets before starting any work.

Once the access panel is removed, you can start working on the sash. Use a flat bar or chisel to pry the narrow parting beads from their grooves. They are typically wedged into or nailed in, but they can be snipped out and it's worth your time here. If the sash remains in place, break the mortise-and-tenon joints out with a screwdriver or hammer, then remove each wood peg. You should be able to move the sash back and forth freely, though it will probably need some oiling if it seems stiff.

With the sash in an open position, measure enough sash cord/chain to extend from the pulley on the top of the jamb to the sash slot in the bottom. Cut the cord/chain and secure it in the step 6 above. You can either use a hammer and nail or screws, but nails are less likely to cause damage.

If you don't have an upgrade kit to replace the old counterbalance system, it's best to keep the original balancing weights in place. They're not expensive and are easy to install if purchased them from salvage shops for architectural use. Based on the size of your window two or three sash weights may be needed to keep the sash in an open position.