10 Myths Your Boss Has Regarding Sash Windows Repair

8 min read

Sash Windows Repair and Replacement

Older sash windows may be prone to a variety of problems including draughts, rattles and poor insulation. A little care can often restore them to a high standard of performance.

First, knock off the paint seal from the window stop using a utility knife. Remove the staff bead, then pull out the upper sash and take out any chains or cords. Store the hardware in a bag that has a label.


Sash windows are beautiful in older buildings, but they require regular maintenance. They can be affected by issues like wet-rot, cracked putty, and draughts. It is possible to minimize energy loss and improve the efficiency of windows with sash by replacing them the windows, repairing or sealing them.

Draughts are mainly caused by gaps between the sash and frame. They can also cause rattles and reduce sound-proofing. Various methods can be used to reduce air leaks in the sash window, such as sealing beads, specialty products and secondary double glazing repair.

A common issue is a gap that exists between the top of the sash and the jamb frame, or the bottom of the sash and the sill. This can lead to moisture leaking in, rotting wood and window doctor near me the growth of mold. Seal the gap using silicone, polyurethane or foam sealant.

If a gap is preventing the windows from opening and closing smoothly, it may be necessary to install new spring bronze or sash runners. These are bronze strips that are stapled or nailed onto the edges of the lower sash in order to prevent sideways rattle. They can be purchased from DIY stores. Tubular weather-stripping made of vinyl is a different option but it has a tendency to tear, and can detract from the appearance of a window.

When installing replacement sash runners it is essential to measure the entire width of the window opening. It is recommended to take measurements from the top of the sash up to the horizontal centerline of the meeting rail and from the bottom of the sash to the sill. These measurements can be transferred to the new runners, which will help ensure a perfect fitting and better operation of the window.

In older buildings the gap between sash and frame is usually greater around the leading edge. It is possible to draught proof by a self-adhesive V-strip, but it is essential to account for this when cutting and measuring the material.

A piece of material should be cut to the length of the sash, with an additional inch each side to allow for movement. It should be trimmed square and placed so that the ends are matched to the angle of the window sill. Use stainless steel screws since brass will rust. Also, make sure to use the highest quality polyurethane or silicone glue.


The sash is an attractive historic feature in many homes. These windows are beautiful however they are susceptible to issues. Common problems include rattling, stuck or draughty windows. Rotting frames and rails that meet, as and broken glazing bars, defective frames or weights that are rotten can cause issues. If you experience any of these problems it’s time to replace or repair your sash.

Refurbishment is more costly than replacing the sash, but it will restore your sash’s look and functionality to the same level in its original condition. It involves lining the meeting rail and sash box with traditional putty and repairing any rot-related damage. It also involves painting the timber frame and re-glazing with traditional glass. A full refurbishment can also include adding draught proofing, re-attaching the sash furniture/ironmongery and replacing the parting bead (the dividing strip between the two panes of glass). It’s also recommended to install brush pile weather strip to prevent the noise of rattling.

If the need for a new sash arises the frame can be constructed from similar designs to the old frame and maintain the style of your home’s historic design. This is particularly crucial for listed homes where any changes to windows will require planning permission.

Compare the metal tabs of the new window to the old sash prior to installing it (see below). If these are different shapes the new sash won’t fit in the window frame slots.

If a Window doctor Near Me is damaged, it’s essential to choose between repair or replacement, since each kind of repair will require a different degree of expertise and price. For example, if a sash window has a large chunk of glass missing then a replacement will be the best option. But when the glass is damaged in a tiny section or a sill has been damaged, a repair would be more appropriate.


Many homeowners would like to keep their old sash windows in good condition, however the deterioration of the window will eventually cause issues like rattles or draughts. Broken glass may also occur. This is why replacing sash windows is often the only solution to these issues. However, there are ways to improve sash windows beyond just replacing them, such as installing draught proofing as well as secondary glazing.

Consider the extent of the problem. It might not be necessary or necessary to replace the window. A foggy glass problem for instance, is usually caused by the sash and can be addressed without having to tear out the entire frame. It is usually possible to repair a weak seal with a few simple fixes, rather than tearing out the entire frame and replacing it.

Sash windows are surprisingly complex in design and have many moving parts. It can be difficult to fix common issues like broken panes or sash cables that have snapped. The majority of homeowners don’t want remove the window frame in order to fix these problems. Because of this, many choose to work with a professional.

Specialists can restore sash window frames to their original splendor or update them to meet the latest energy standards. This could include reconditioning the frames and installing secondary glazing to stop heat through the window. It can also be helpful to put in an extra strip of brush pile to stop the rattling and decrease drafts.

To begin a repair, remove the window stops. (The moldings that are on the side of the lower glass). Next, loosen the staff bead, then take off the lower sash. Take off the cords or chains on both sides. Then, remove the sash weights from bottom of the weight cavity and remove them. Place the hardware in a safe location. The heat gun will soften old, hardened filler or putty. Scrape it away with a blade made of putty. Reassemble the window, reconnect the hardware and lubricate pulley axles by using silicone or Teflon spray. Reinstall the parting beads and then reinstall the upper sash.


It is important for the homeowner to make a decision on whether to repair or replace their sash windows. Modern replacements have many benefits however, the original features of an older home can provide the character and value. They are also cheaper to repair instead of replacing. Keeping them in good condition can also save energy costs. Sash windows are susceptible to rattles, drafts, and condensation, and these problems can result in increased cost of energy and damage to the frame and the sash.

Sash windows are notoriously difficult to open and close as the traditional sliding mechanism can become dislodged from its track, or even draughty. It is recommended to leave the repair of sash windows to professionals because they require extensive dismantling. With the right tools and skills it is possible to fix an the sash window that is old. Adam shows Jess the basics:

The process of bringing the window apart begins with the removal of any security fittings that are in front of the lower sash. Then, remove the staff bead. Finally, pull out the bottom sash. Then, remove the cords or chains on both sides and knot the ends to stop them from being pulled back into the frame by the weights that are attached. The next step is to take out the upper sash. Remove the sash stops (a thin vertical strip of wood that supports the sash) and remove any paint-encrusted hardware. The sash can be pulled back to reveal the balancing weight which is a heavy lead or iron cylinder enclosed in a hidden cavity and anchored by rope. To stop the sash from falling into the void pierce it with a nail and sacrifice the weight.

When the sashes are untied Clean the jamb and rails that meet, remove the glazing bars and sash cords, and remove any paint from the sash stops using a utility knife. After the sashes have been put back in place, reattach the stops using nails that are not too large to risk puncturing the weight that is balancing.

To reassemble the sash, put the top sash into its track first, and then the lower sash. Make sure the sash stops are properly aligned with the frame, and then reconnect the parting beads if needed. Reattach the sash chains or cords and attach the sash pulleys.

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