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Sash Windows Repair and Replacement

Sash windows that are older than 20 years can have many issues, including draughts and rattles. They could also be inefficiently constructed to be insulated. A little bit of care can often restore them to a top level of performance.

First, remove the seal of paint 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. Keep the hardware in a bag that has the label.

Sealing

Sash windows are beautiful in older buildings, however they require care. They are susceptible to problems like wet-rot cracked putty, and draughts. Repair, sealing, or replacement of the sash window is an effective method to minimize these issues and improve the efficiency of energy.

The gaps between sash and frame are the main source of draughts. They can also cause noise reduction and misted rattle. Various methods can be used to reduce air leaks in the sash window, such as 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 common. This can lead to moisture leaking in, rotting wood and growth of mold. Seal the gap with silicone, polyurethane, or foam sealant.

Installing a new sash runner, or spring bronze may be required if a gap prevents windows from opening and shutting smoothly. These bronze strips are attached by staples or nails to the lower sash edges in order to stop sideways rattling. They can be purchased at DIY stores. Tubular weatherstripping also can be used, however it is more likely to tear and may alter the look of your window.

It is crucial to take measurements of the entire window opening prior to installing the an alternative sash runner. It is best to measure from the top of the sash to the horizontal centerline of the rail that connects it, and from the bottom of the sash to the sill. These measurements can then be transferred to new runners that will ensure a better fit and operation of the window.

In older structures there is a larger gap between the sash and the frame around the leading edge. It can be draught-proofed with a strip of self-adhesive V-strips, but it is essential to consider this when measuring and cutting the material.

The strip should be cut to the height of the sash with an inch extra on each side to allow movement. It should be cut square and positioned so that the ends are matched to the angle of the window sill. It is also essential to use stainless steel screws since brass can rust and the best quality silicone or polyurethane adhesive.

Refurbishment

The sash is a beautiful historic feature in many homes. These windows are gorgeous, but they can be susceptible to problems. Common issues include rattling stuck or draughty windows. And rotting frames and meeting rails, broken glazing bars, or damaged weights could add to the inconvenience. If you experience any of these issues it's time to replace or repair your sash.

Refurbishment can be a more costly option than simply replacing the sash itself however, it can restore the look and function of your sash window the same or better than the original condition. Refurbishment involves lining the meeting rail as well as the sash box with traditional putty, and repairing any damage caused by the rot. It also includes re-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 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 design to match your old frame. This will maintain the traditional style of your property. This is particularly crucial for listed homes where any modifications made to windows will require planning permission.

Before you put the new window in place before installing it, make sure you examine its metal tabs with the tabs on the old sash (see below). If these are different shapes the new sash will not fit correctly into the window frame slots.

When a window is damaged it is essential to decide between replacement or repair, because each type of work will involve a different level of expertise and price. If a large portion of the glass in the sash is missing replacing it is the better alternative. But 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

Many homeowners want to keep their old sash window in good shape, but deterioration will eventually cause problems like rattles or draughts. Broken glass can also occur. This is why replacing them is often the only solution to these issues. There are other methods to improve the performance of sash windows other than replacing them. These include installing secondary glazing and draughtproofing.

It is important to determine the severity of a problem, as it may not be appropriate or even practical to replace an entire window. Foggy glass, for example is typically caused by the sash and can be fixed without tearing out the entire frame. It is often possible to fix a weak seal using a couple of simple fixes, rather than ripping out the entire frame and replacing it.

Sash windows are surprisingly complicated in their design and come with a lot of moving parts. This is why it can be tricky to solve common issues, like snapped sash cords or broken panes. The solution to these issues typically involves dismantling the window frame, which isn't something most homeowners would want to tackle on their own. For these reasons, many opt to hire a specialist.

Specialists can restore sash window frames back to their original glory or bring them up-to-date with the latest energy standards. This could include reconditioning frames and installing secondary glass to stop heat from escaping through the upvc window repairs. It may also be beneficial to install a brush pile strip, to stop rattling, and reduce drafts.

To begin a repair, take off the window stops. (The moldings are located in front of the lower glass). Then, loosen the staff and remove the lower window sash. Take the chains and cords from both sides. Finally take the sashweights out of the bottom cavity of the weight. Keep the hardware in a safe location. Soften any old, hardened putty or filler using a heat gun, and scrape it away using a putty knife. Reassemble the window. Reattach the hardware. Lubricate the pulleys by using Teflon or silicone spray. Install the parting beads again and then reinstall the upper sash.

Repair

The choice of replacing or repairing windows with sash is a crucial one for the homeowner. Although modern replacements can provide a host of benefits but the original features of an older house give character and value to the home and are usually cheaper to fix than replacing them. Maintaining them in good condition will also help you save money on energy. Sash windows can be prone to drafts and rattles. This could result in higher energy bills and damage the frame and the sash.

Sash windows can be a challenge to open and misted close. The mechanism for sliding could be slack or even draughty. Repairing a sash window requires extensive dismantling of the window frame, so it's best left to professionals. However, with the right tools and know-how, it is possible to repair old windows using sash. Adam shows Jess how to get started:

Remove any security fittings that are behind the lower window sash. Next, remove the staff bead and take the sash off the bottom. Remove the cords and chains from both sides, and knot them in a way that they can't be pulled back by the weights attached. It's now time to remove the upper sash. Take out the sash stops which is a thin vertical wood strip that holds the sash. Also, remove any hardware that has been painted. Pull the sash back to reveal the weight. It is a large iron or lead cylinder that is concealed in a cavity and is secured by a cord. To prevent the sash from falling into the void hit 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 from the sash stops with a utility knife. Once the sashes are returned to their original positions, you can attach the stops using nails that are small enough to prevent damaging the balancing weight.

Reassemble the sash by putting the upper sash on top of its track, followed by the lower sash. Make sure the sash stoppers are properly aligned with the frame, and reattach the parting beads if needed. Reattach the sash chains or cords and install the sash pulleys.