An Easy-To-Follow Guide To Sash Windows Repair Sash Windows Repair and Replacement

Older sash windows may be plagued by a variety of issues including draughts rattles, and inadequate insulation. A little attention can often bring them back to a high standard of performance.

First, remove the seal with a utility knife. Remove the staff bead, pull out the upper sash, and take out any chains or cords. Store the hardware in a container with the label.


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

The gaps between sash frame are the main source of draughts. They can also cause rattles and reduce sound-proofing. Various methods can be used to stop air leaks from a sash window, including sealing beads, specialty products and secondary glazing.

A common issue is a gap between the top of the sash and the jamb frame or between the bottom of sash and the sill. This can cause moisture to leak into the wood, which can cause rotting and the growth of mold. The gap can be sealed with silicone or polyurethane caulking or foam sealant.

Installing new sash runner or spring bronze could be required if a gap prevents the windows from closing and opening effortlessly. These are bronze strips that are stapled or nailed into the edges of the lower sash in order to prevent sideways rattle. They are available from DIY stores. Tubular vinyl weather-stripping is an alternative option but it is prone to tear and make a difference to the appearance of windows.

It is crucial to determine the size of the window opening before installing new sash runners. It is best to measure from the top of sash up to the horizontal line on the meeting rail and from the bottom of sash down to the sill. These measurements can be transferred to the new runners, which will ensure a good fit and better operation of the window.

In older buildings there is a larger gap between the sash and the frame on the leading edge. It can be draught-proofed using a strip of V-strip that is self-adhesive. However it is crucial to take this into consideration when cutting and measuring material.

A strip should be cut to the length of the sash. There should be an extra inch to allow for movement. It should be squarely trimmed and positioned to align with the angle of the sill. Make sure to use stainless steel screws since brass can rust. Also, make sure to use high-quality silicone or polyurethane glue.


The sash is a stunning historical feature of a lot of homes. These windows are gorgeous, but they can be susceptible to issues. Rattling, draughts, sticking or leaks are all common problems. Frames that are rotting and rails that meet, as well as broken glazing bars, damaged frames or weights that are rotten can cause issues. When these issues arise, it's time for an sash repair or replacement.

Refurbishment is more expensive alternative than replacing the sash itself, but it can bring back the appearance and function of your sash window to as good if not better than the original condition. Refurbishment involves the lining of both the meeting rail and the sash box with traditional putty, and then repairing any damage caused by decay. Re-painting the frame of the timber is also included, as well as re-glazing using 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 is also recommended to put in brush pile weather strip to minimize the rattling.

If a new sash is required it can be constructed using similar designs to the frame that was previously used and keep your property's heritage style. This is especially important for buildings that are listed, as any changes to the windows will require planning permission.

Compare the metal tabs on the new window to the old sash prior to installing it (see below). If they're different shapes, the new sash will not fit in the slots of the window frame.

It's important to decide whether to repair or replace windows that are damaged, as each choice will require a different degree and amount of knowledge. If a large part of the glass in a sash is missing, replacing it would be an alternative. However when the glass is damaged in a tiny section or a sill is decaying, a repair may be the better option.


While a lot of homeowners are eager to keep their old sash windows in good working condition, the deterioration of the windows can result in problems like rattles, draughts or even broken glass. This is why replacing sash windows is often the only solution to these issues. There are other options to improve the performance of sash windows rather than replacing them. These include installing secondary glazing and draughtproofing.

Think about the scope of the problem. It may not be necessary or even suitable to replace windows. A foggy glass problem for instance is typically caused by the sash and can be resolved without tearing out the entire frame. A poor seal can also often be corrected by making a few minor adjustments rather than an expensive full-frame tear-out and replacement.

Sash windows are surprisingly complicated in their design and come with a lot of moving parts. It can be a challenge to fix common issues like broken panes or snapped sash cable. Many homeowners do not want to take apart the window frame to fix the issues. Many homeowners choose to work with a professional due to these reasons.

Specialists can restore sash window frames to their original splendor or make them more up-to-date with modern energy standards. This could include reconditioning the frames and installing secondary glazing to stop heat escaping through the window. It is also possible to add a brush-pile strip to reduce drafts and stop the window from shaking.

To begin the repair, remove the window stops. ( window repairs that are in front of the lower glass). Then loosen the staff and pull out the lower window sash. Take off the chains or cords that are on both sides. Finally, remove the sash weights from the bottom of the cavity and remove them. Store the hardware in a safe place. The heat gun will soften the old, hardened filler or putty. Scrape it away with the blade of a putty. Reassemble the window, attach the hardware and lubricate pulley axles with silicone or Teflon spray. Reinstall the parting bead and reinstall upper sash.


It is crucial for the homeowner to make a choice on whether to replace or repair their sash windows. Modern replacements have many benefits however, the original features in an older home can add the character and value. They are also less expensive to repair than replacing. Inspecting them regularly can help lower the cost of energy. Sash windows are susceptible to drafts, rattles, and condensation, and these problems can lead to increased cost of energy and damage to the frame and the sash.

Sash windows can be difficult to open or close. The mechanism for sliding could become dislodged or draughty. Repairing a sash window involves extensive dismantling of the frame of the window, so it's best left to the professionals. With the right tools and know-how, it is possible to fix old windows with sash yourself. Adam shows Jess the basics:

The process of bringing the window apart starts with the removal of any security fittings in front of the lower sash. Then, take off the staff bead. Finally, pull out the sash at the bottom. Take the chains and cords from both sides, and tie them in such a way that they won't be pulled back by the weights. It's now time to remove the upper sash. Unscrew the sash stoppers (a thin vertical strip of wood that holds the sash) and remove any painted-covered hardware. Reverse the sash to reveal the weight. It is a massive iron or lead cylinder that is hidden in a cavity and is held by an elastic cord. To prevent the sash from falling into the void make a hole in it using an hammer and then sacrifice the weight.

After the sashes have been removed clean the jambs as well as rails that connect them. Remove the glazing bars as well as the cords for the sash. Then, using a utility blade take off any paint that is on the sash stop. Reattach the stops once the sashes are reinstalled. Use nails that are not large enough to puncture the balancing weight.

Reassemble the sash by putting the upper sash first into its track, followed by the lower sash. Make sure the sash stoppers are in the correct alignment with the frame, and then reconnect the beads for parting if necessary. Reattach the sash chains or cords and attach the sash pulleys.

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