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Sash Windows Repair and Replacement

Sash windows that are older than 20 years may have many issues that include rattles and draughts. They could also be inefficiently constructed to be insulated. With a little attention they can be restored to a higher level of performance.

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

Sealing

Sash windows look stunning in older buildings, however they require regular maintenance. They can be affected by problems like wet-rot cracked putty, and draughts. Repair, sealing, broken or replacement of the windows sash is an effective method to minimize these issues and improve energy efficiency.

Draughts are usually caused by gaps between the sash and frame. They can also cause rattling and reduced sound-proofing. Sealing beads, special products and secondary glazing can be used to limit the air leakage inside the shutter.

A gap between the top and bottom of the sash, and the jamb frame is an issue that is common. This can lead to the leaking of moisture and rotting of the wood, and mould growth. The gap can be filled with caulking made of polyurethane or silicone or foam sealant.

Installing a new sash runner or spring bronze may be necessary when a gap is preventing windows from closing and opening easily. These are a type of bronze that are stapled or nailed onto the edges of the lower sash to stop sideways rattle, and they are available from DIY stores. Tubular weatherstripping also can be used, but it is prone to tear and can alter the appearance of your window.

It is crucial to measure the entire window opening before installing an alternative sash runner. It is recommended to take measurements from the top of the sash up to the horizontal centerline on the rail that connects them and from the bottom of sash down to the sill. These measurements can be transferred to new runners, which will ensure the best fit and function of the window.

In older structures there is a greater gap between the sash and frame on the leading edge. It can be draught proofed by using a self-adhesive V-strip, but it is crucial to consider this when cutting and measuring the material.

The strip should be cut at the height of the sash and with an inch extra on each side to allow for movement. It should be cut squarely and placed to align with the angle of the sill. Use stainless steel screws as brass can rust. Also, make sure to use high-quality polyurethane or silicone glue.

Refurbishment

The sash window is an elegant and historic feature of many homes. But despite their beauty, windows like sash windows can be prone to a myriad of issues. The most frequent issues are rattling, draughts or sticking. The rotting of frames and meeting rails, broken glazing bars, or damaged weights could create a mess. When these issues arise, it's time to consider a sash repair or replacement.

Refurbishment is a more expensive alternative than replacing the sash itself however, it can bring back the appearance and function of your sash window as good, if not better than its original state. It involves lining the meeting rail and sash box using traditional putty, and then repairing any rot damage. It also involves re-painting the frame of timber 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 is also recommended to put in brush pile weather strip to minimize rattling.

If a replacement sash needed it can be constructed with the same design to match the frame you have. This will help preserve the style and character of your house. This is especially important for listed buildings where any modifications made to windows will require planning permission.

Before putting the new window on before installing it, make sure you check the metal tabs against those on the sash that was previously used (see below). If they are different shapes and sizes, the new sash will not fit in the window frame slots.

It's important to decide whether to replace or repair windows that are damaged, as each choice will require a different degree and cost of knowledge. If a large portion of the glass in the sash is missing then replacing it will be the better alternative. However in the event that the glass has been damaged in one small section or a sill has begun decaying, a repair may be more appropriate.

Replacement

While a lot of homeowners are eager to keep their old sash windows in good working condition, deterioration could eventually result in problems like draughts, rattles, or even broken glass. These issues often point to an inevitable replacement as the only logical solution. There are other ways to improve sash window performance than simply replacing them. This includes the installation of secondary glazing and draught-proofing.

It is crucial to assess the severity of a problem, as it may not be appropriate or even practical to replace an entire window. Foggy glass, for example, is usually caused by the sash, and can be addressed without having to tear out the entire frame. A poor seal can also be fixed by making a few minor adjustments instead of a costly full frame tear-out and replacement.

Sash windows are a complicated design with a lot of moving parts. This is why it can be difficult to fix common issues, like snapped sash cords or broken panes. Resolving these issues often requires taking apart the window frame, which isn't something the majority of homeowners would like to tackle on their own. For these reasons, many opt to hire a specialist.

A specialist can assist in restoring windows made of sash to their original splendor or even bring them up to modern energy standards. This may include reconditioning frames and installing secondary glazing to stop heat escaping through the window. It may also be beneficial to install a brush pile strip to stop rattling and reduce drafts.

To start a repair project take out the window repair stops (the moldings in front of the lower sash). Next, loosen the staff bead, then take off the lower sash. Take off the chains or cords that are on both sides. Lastly take the sashweights out of the bottom of the cavity for weight. Place the hardware in a secure place. The heat gun will soften hardened filler or putty. Scrape it off using a blade made of putty. Reassemble the window. Reattach the hardware. Lubricate the pulleys using Teflon or silicone spray. Reinstall the parting beads and reinstall the upper part of the sash.

Repair

It is essential for homeowners to decide whether to repair or replace their sash windows. Although modern replacements can provide many advantages however, broken the original features of a home that was built earlier give character and value to the property and are generally less expensive to repair than replacing them. Maintaining them in good condition can also save energy costs. Sash windows are susceptible to drafts and rattles. This can result in higher energy bills and even damage to the frame and the sash.

Sash windows can be difficult to open or close. The mechanism for sliding could be slack or draughty. It is best to leave the repair of window with sash to a specialist because they require extensive removal. With the right tools and knowledge, it is possible to fix old windows using sash. Adam shows Jess the basics:

Remove any security fittings in front of the lower window sash. Next, remove the staff bead, then pull out the bottom sash. Then, take the chains or cords on both sides, and tie the ends to stop them from being pulled back into the frame by the weights attached to them. It's now time to take out the upper sash. Remove the sash stops and a thin wood strip that holds the sash. Also, remove any paint-encrusted hardware. The sash can be pulled back to reveal the weight balancing, which is a heavy iron cylinder that is encased in a hidden cavity and held by a rope. To stop the sash falling into the void pierce it with an hammer and then sacrifice the weight.

When the sashes are untied, clean out the jamb and meet rails, remove the glazing bars and sash cords and remove any paint off the sash stops with an utility knife. Reattach the stops once the sashes are reinstalled. Use nails that are not large enough to puncture the balancing weight.

Reassemble the sash by inserting the upper sash first into its track, followed by the lower sash. Check that the sash stops and the frame are aligned correctly. If necessary, reattach any parting beads. Then, reconnect the sash chains or cords and re-install the axles of the sash pulleys.