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Sash Windows Repair and Replacement

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

First, knock 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, seal and remove any cords or chains. Keep the hardware in a bag that has the label.

Sealing

Sash windows are gorgeous 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 decrease energy loss and increase the efficiency of windows with sash by replacing them the windows, repairing or sealing them.

Draughts are usually caused by gaps between the sash and the frame. They can also trigger rattles and reduce sound-proofing. Sealing beads, special products and secondary glazing can be used to limit the air leakage within the sash.

A common problem is a gap between the top of the sash and the jamb frame or between the bottom of the sill and the sash. This can cause moisture leaking in the wood, rotting and the growth of mould. The gap can be sealed by caulking made of silicone or polyurethane or foam sealant.

If a gap in the window is preventing the windows from opening and closing without a hitch, it might be necessary to install new spring bronze or sash runners. These bronze strips are stapled or nailed to the lower sash edges in order to prevent sideways rattling. They can be bought at DIY stores. Tubular weatherstripping also can be used, but it is prone to tear and can detract the appearance of your window.

When installing replacement sash runners it is essential to measure the entire width of the window opening. It is best to measure from the top of the sash up to the horizontal line on the rail that connects them and from the bottom sash down to the sill. These measurements can be transferred to the new runners, which will help ensure a proper fit and a better performance of the window.

In older structures the gap between the frames and sash is typically larger around the leading edge. It can be draught-proofed by a self-adhesive V-strip, but it is crucial to take this into consideration when measuring and cutting the material.

A piece of material should be cut to the height of the sash. There should be an extra inch on each side to allow for movement. It should be squarely trimmed and placed to match the angle of the sill. It is also essential to use stainless steel screws, as brass can rust, and a high-quality polyurethane or silicone adhesive.

Refurbishment

The Sash window is a beautiful and historic feature of many homes. But despite their beauty, these windows are susceptible to a myriad of issues. The most frequent issues are rattling, draughts or sticking. The rotted frames and the rails that meet, as and broken glazing bars, faulty frames or weights that are rotten can cause issues. If you are experiencing any of these issues, it is time to replace or repair your sash.

Refurbishment can be a more costly 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. Refurbishment involves lining the meeting rail as well as the sash box using traditional putty, and repairing any damage caused by rot. It also involves 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 minimize rattling.

If the need for a new sash arises, it can be made from like-for-like designs to match the frame of the previous one and preserve the style of your home's historic design. This is especially important for listed buildings where any modifications to windows will require planning permission.

Before you put the new window on before installing it, make sure you compare its metal tabs to those on the old sash (see below). If they are different shapes the new sash may not fit inside the slots of the window frame.

It's important to decide whether to replace or repair a damaged window, as each choice will require a different level and cost of knowledge. If a large part of the glass in the sash is missing replacing it is a better alternative. If the glass is damaged in a tiny area or a sill is beginning to rot, then a repair would be better.

Replacement

While a lot of homeowners are eager to keep their old sash windows in good working order, deterioration can eventually result in problems like draughts, rattles, or even broken glass. This is why replacing sash windows is often the only solution to these issues. However, there are ways to improve the sash windows that go beyond replacing them, like installing draught proofing and secondary glazing.

Consider the extent of the problem. It might not be necessary or suitable to replace a window. For instance, a foggy glass issue typically occurs within the sash itself and is typically a solution without having to tear out the entire frame. It is often possible to fix a poor seal using a couple of simple solutions, rather than cutting out the entire frame and replacing it.

Sash windows are extremely complex in design and feature a lot of moving parts. This is why it can be a challenge to remedy some common problems like sash cords that are snapped or broken panes. Most homeowners don't want to disassemble the window frame in order to fix these problems. Because of this, many choose to work with an expert.

Specialists can restore sash window frames back to their original splendor or bring them up-to-date with modern energy standards. This could include reconditioning the frames and fitting secondary double glazing window repair to stop heat escaping through the window. It is also possible to install an extra strip of brush pile to stop rattling, and reduce drafts.

To begin a repair project take out the window stops (the moldings in front of the lower sash). Then loosen the staff and pull the lower window sash. Take off the chains or cords on both sides. Finally remove the sashweights from the bottom cavity of the weight. Keep the hardware in a safe position. Soften any old filler or hardened putty using a heat gun, and scrape it away using the help of a putty knife. Reassemble the window. Reattach the hardware. Lubricate the pulleys by using Teflon or silicone spray. Reinstall the parting bead, and install the upper sash.

Repair

It is crucial for the homeowner to make a choice on whether to replace or repair their sash windows. Modern replacements offer many advantages, but the original features in an older home can provide the character and value. They are also less expensive to repair rather than replace. Maintaining them in good condition can help save on energy costs. Sash windows can be susceptible to drafts and rattles. This can result in higher energy bills and damage the frame and sash.

Sash windows can be a challenge to open or close. The sliding mechanism may become dislodged or draughty. Repairing a sash windows requires extensive removal of the window frame and should be left to a professional. But, with the right tools and knowledge it is possible to repair old sash windows yourself. Adam shows Jess how to get started:

Remove any security fittings in front of the lower window sash. Then, remove the staff bead, then remove the bottom sash. Remove the chains and cords 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 strip of wood that holds the sash. Also, take off any paint-encrusted hardware. Reverse the sash to reveal the weight. It is a large iron or lead cylinder that is concealed in a cavity, and supported by an elastic cord. To stop the sash from falling into the void pierce it with a nail and then sacrifice the weight.

Once the sashes are free Clean the jamb and meet rails. remove the glazing bars and sash cords and remove any paint off the sash stops with the help of a utility knife. After the sashes have been put returned to their original positions, you can attach the stops using nails that are small enough to avoid puncturing the balancing weight.

To reassemble the sash put the top sash into its track first, and then the lower sash. Verify that the sash stoppers and the frame are aligned properly. If necessary, reattach any parting beads. Then, reconnect the sash chains or cords and re-attach the sash pulley axles.