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Sash Windows Repair and Replacement

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

First, cut off the seal of paint using an utility knife. Remove the staff bead, then pull out the upper sash and take off any chains or cords. Store the hardware in a container with the label.

Sealing

Sash windows are beautiful in older buildings, but they do need maintenance and can be subject to issues such as wet rot, cracked putty and draughts. Repair, sealing or replacement of the sash window is an effective way to reduce these problems and increase energy efficiency.

The gaps between sash and frame are the primary source of drafts. They can also lead to rattles and reduce sound-proofing. Different methods can be employed to reduce air leaks in windows with sash, including sealing beads, specialist products and secondary double glazing window repair.

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

If a gap is hindering the windows from opening and closing without a hitch, it might be necessary to put in new sash runners or spring bronze. These bronze strips are stapled or nailed to the lower sash edges to stop the rattling of the sides. They are available at DIY stores. Tubular weatherstripping also can be used, however it tends to rip and can detract the appearance of your window.

When replacing sash runners it is essential to take full measurements of the window opening. 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 later be transferred to new runners that will ensure a better fit and operation of the window.

In older structures the gap between frame and sash is typically wider around the leading edge. It is possible to draught-proof it using a strip of V-strip that is self-adhesive. However it is crucial to take this into consideration when measuring and cutting the material.

The strip should be cut at the top of the sash, with an inch extra on each side to allow for movement. The strip should be cut square and placed in a way that the ends are matched to the angle of the window sill. It is also important to use stainless steel screws, because brass is prone to rust, and high-quality silicone or polyurethane adhesive.

Refurbishment

The windows with sash are a stunning and historic feature of many homes. But despite their beauty, these windows are prone to a variety of problems. The most frequent issues are rattling, stickiness or draughts. And rotting frames and meeting rails, broken glazing bars, or damaged weights could create a mess. When these problems occur it's time to consider an sash repair or replacement.

Refurbishment is more expensive option than simply replacing the sash itself but it will restore the look and function of your sash window to the same or better than its original state. Refurbishment involves the lining of 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's also recommended to install brush pile weather strip to reduce the rattling.

If you require a new sash the frame can be constructed from like-for-like designs to match the frame of the previous one and preserve your property's heritage style. This is particularly important for listed properties where any modifications made to the windows will require planning permission.

Compare the metal tabs on the new window with those of the old sash prior installing it (see below). If they're different sizes the new sash may not fit in the window frame slots.

When a window is damaged it is essential to decide between repair or replacement because each type of work will require a different degree of expertise and expense. If a large part of the glass in a sash is missing then replacing it will be a better alternative. If the glass is damaged in a tiny area or a sill is rotting, then a repair would be better.

Replacement

Many homeowners want to keep their old sash windows in good condition, but deterioration will eventually cause problems such as rattles or draughts. Broken glass can also occur. These issues often lead to a replacement as the only logical solution. There are other ways to improve the performance of sash windows rather than replacing them. This includes installing secondary glazing and draught-proofing.

It is important to determine the extent of a problem, as it may not be feasible to replace a complete window. For example, a foggy glass issue is usually a problem within the sash itself and is typically a solution without ripping out the whole frame. A poor seal can also often be corrected with a few simple fixes instead of a costly full-frame tear-out and replacement.

Sash windows are surprisingly complex in design and have many moving parts. It can be a challenge to fix some common problems like cracked panes or snapped sash cable. Solving these issues usually requires dismantling the window frame, which isn't a job the majority of homeowners would like to tackle themselves. Many homeowners decide to engage a professional for these reasons.

A specialist can assist in restoring sash windows back to their original glory or even bring them up to the latest energy standards. This could include reconditioning frames and installing secondary glass window repair to stop heat from getting out of the window. It may also be beneficial to install a brush pile strip to stop rattling and reduce drafts.

To begin a repair, remove the window stops. (The moldings that are in front of the lower glass). Next, loosen the staff bead and remove the lower sash. Take the chains and cords from both sides. Finally, remove the sash weights from the bottom of the weight cavity and remove them. Keep the hardware in a safe position. Heat gun to soften hardened filler or putty. Scrape it away with the blade of a putty. 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

It is important for homeowners to decide whether to repair or replace their sash windows. Modern replacements offer many advantages however, the original features of an older home can add the character and value. They are also cheaper to repair than replacing. Maintaining them in good condition can help save on energy costs. Sash windows can be susceptible to drafts and rattles. This can lead to higher energy bills and even damage to the frame and sash.

Sash windows can be a challenge to open and close. The sliding mechanism may become sloppy or draughty. repairing glass a sash window involves extensive removal of the frame of the window and should be left to professionals. With the right tools and skills it's possible to repair an the old sash window yourself. Adam shows Jess how to begin:

The process of bringing the window apart starts with the removal of any security fittings that are in front of the lower sash. Then, remove the staff bead, then take the sash off the bottom. Then, pull out the chains or cords on both sides and tie them to stop them from being pulled back into the frame by the attached weights. It's now time to remove the upper sash. Remove the sash stops (a thin vertical strip of wood that supports the sash) and remove any painted-covered hardware. The sash should be pulled back to reveal the weight. It is a massive iron or lead cylinder, which is tucked away inside a cavity and held by cords. To keep the sash from falling into the void, pierce it with an hammer and then sacrifice the weight.

After the sashes have been removed clean the jamb and meet rails. remove the glazing cords and sash bars, and scrape off any paint off the sash stops using an utility knife. Reattach the stops when the sashes have been put back in place. Use nails that are small enough not to damage the balancing weight.

Reassemble the sash by placing the upper sash on top of its track, then the lower sash. Make sure that the sash stops and the frame are aligned properly. If needed, reconnect any parting beads. Reattach the sash cords or chains and install the sash pulleys.