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Sash Windows Repair and Replacement

Sash windows that are older than 20 years old can be afflicted with various issues, including draughts and rattles. They may also be inefficiently constructed to be insulated. With a little attention, they can be restored to a higher level of performance.

First, scrape off the seal of paint from the window stop with the knife of a utility. Remove the staff bead, then pull out the upper sash and remove any cords or chains. Store the hardware in a bag with an identification label.

Sealing

Sash windows are beautiful in older buildings, however they require regular maintenance. They are susceptible to issues such as wet-rot, cracked putty and draughts. It is possible to reduce energy loss and increase the efficiency of windows made of sash by replacing, repairing double glazed windows or sealing them.

Draughts are mostly caused by gaps between the sash and frame. They can also cause noise reduction and rattling. Various methods can be used to stop air leaks from a sash window, including sealing beads, special products, and secondary glazing.

A gap between the top or bottom of the sash and the jamb frame, is an issue that is frequent. This can lead to moisture leaking in, rotting wood, and mold growth. Seal the gaps with silicone, polyurethane or foam sealant.

If a gap is preventing windows from closing and opening smoothly, it may be necessary to put in new spring bronze or sash runners. These are strips of bronze that are stapled or nailed onto the edges of the lower sash to stop sideways rattle, and they can be purchased at DIY stores. Tubular vinyl weather-stripping is an alternative option but it can tear, and can affect the appearance of windows.

When replacing sash runners It is crucial to measure the window opening. It is best to measure from the top of sash up to the horizontal line on the rail of the meeting and from the bottom of sash down to the sill. These measurements can be incorporated into the new runners, which will ensure a good fitting and better operation of the window.

In older structures there is a larger gap between the sash as well as the frame at the leading edge. It is possible to draught-proof it using a strip of V-strip which is self-adhesive. However it is essential to consider this when cutting and measuring material.

The strip should be cut at the top of the sash with an inch extra on each side to allow movement. It should be cut squarely and placed to match the angle of the sill. Use stainless steel screws as brass will be rusty. Also, make sure you use a high quality polyurethane or silicone glue.

Refurbishment

The sash is an attractive, historical feature of many homes. However, despite their beauty these windows are prone to a variety of problems. Draughts, rattling or leaking are common issues. The rotting of frames and meeting rails, broken glazing bars or faulty weights can cause a lot of trouble. If these issues occur, it's time to consider repairs or replacements to your sash.

Refurbishment is more expensive alternative than replacing the sash, however, it can improve the appearance and functionality of your sash window to as good, if not better than its original state. It involves lining the meeting rail and sash boxes with traditional putty and fixing any rot-related damage. Re-painting of the timber frame is also included, as well as 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 prevent rattling.

If a replacement sash is needed it can be constructed using the same style to match your existing frame. This will help preserve the heritage style of your property. This is particularly important for listed buildings where any modifications to windows need planning permission.

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

If a window has been damaged, it is crucial to decide between repair or replacement, because each type of work will require a different level of expertise and expense. If a large portion of the glass in a sash is missing, replacing it is a better alternative. If the glass is only damaged in a small area or a sill has begun to decay or rotting, then a repair could be better.

Replacement

Although many homeowners want 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. These issues typically lead to a replacement as the only logical solution. However, there are other ways to improve sash windows, beyond simply replacing them, such as installing draught proofing as well as secondary glazing.