Sash Windows Repair and Replacement

Sash windows older than 20 years may have many issues that include rattles and draughts. They might also be inefficiently insulated. With a little effort, they can be restored to a high level of performance.

First, remove the paint seal using an utility knife. Then remove the staff bead and remove the upper sash by removing chains or cords, and then storing the hardware in a labeled bag.

Sealing

Sash windows look gorgeous in old buildings, however they require maintenance and are susceptible to issues like cracked putty, wet rot, and drafts. It is possible to reduce energy loss and increase the efficiency of sash windows by replacing the windows, repairing or sealing them.

The gaps between the sash and frame are the main source of drafts. They can also trigger rattles and reduce sound-proofing. Sealing beads, special products and secondary glazing can all be used to reduce the air leakage inside a shutter.

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

Installing a new sash runner, or spring bronze may be required if a gap prevents windows from closing and opening easily. These bronze strips are tied or stapled to the lower sash edges to prevent the rattling of the sides. They can be bought at DIY stores. Tubular weatherstripping also can be used, but it is more likely to tear and can detract the appearance of your window.

It is essential to determine the size of the window opening prior to installing the new sash runners. It is recommended to measure from the top of sash up to the horizontal line on the rail of the meeting and from the bottom sash down to the sill. These measurements can be incorporated into the new runners, which will help ensure a proper fitting and better operation of the window.

In older buildings, the gap between sash and frame is usually larger around the leading edge. It can be draught-proofed by using a strip of V-strip that is self-adhesive. However it is essential to consider this when cutting and measuring material.

The strip should be cut at the height of the sash, with an inch added on each side to allow for movement. It should be squarely trimmed and positioned in accordance with the angle of the sill. It is also essential to use stainless steel screws since brass can rust and a high-quality polyurethane or silicone adhesive.

Refurbishment

The windows with sash are a stunning, historic feature of many homes. But despite their beauty, these windows are prone to a myriad of issues. Draughts, rattling or leaking are typical issues. Frames that are rotting and rails that connect them, as well as broken glazing bars, faulty weights or rotten frames can cause issues. If you are experiencing any of these problems it's time to replace or repair your sash.

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

If a replacement sash required it can be constructed using the same style to match the frame you have. This will preserve the traditional style of your home. This is particularly important for Sash Windows Repair 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 before installing it (see below). If they're different sizes, the new sash will not fit in the window frame slots.

It is important to decide if you want to repair or replace windows that are damaged, as each option will require a different degree and level of expertise. For instance, if a sash window has a significant piece of glass missing then replacement is the best option. But, if the glass is damaged in one small section or Sash Windows Repair a sill has been decaying, a repair may be more appropriate.

Replacement

Although many homeowners want to keep their old windows in good condition, deterioration could eventually cause problems such as rattles, draughts or even broken glass. This is why it's often the only option to solve these issues. There are other methods to improve the performance of sash windows other than replacing them. These include the installation of secondary glazing and draught-proofing.

Take note of the severity of the issue. It may not be necessary or suitable to replace a window. A foggy glass problem for instance, is usually caused by the sash and can be addressed without having to tear out the entire frame. A weak seal can often be corrected by making a few minor adjustments rather than an expensive full-frame tear-out and replacement.

Sash windows are a complicated design with a lot of moving parts. It can be a challenge to fix common issues such as broken panes, or sash cables that have snapped. Many homeowners do not want to disassemble the window frame in order to repair these issues. This is why many homeowners choose to work with a specialist.

A specialist can assist in restoring windows with sash back to their original glory or even bring them up to the latest energy standards. This can include reconditioning the frames and fitting secondary glazing, which will stop heat from the window repairs. It is also possible to add a brush pile strip, to stop rattling, and reduce drafts.

To begin the repair, take off the window stops. (The moldings that are in front of the lower glass). Then loosen the staff and pull out the lower window sash. Remove the cords and chains from both sides. Finally, disconnect the sash weights from the bottom of the cavity and remove them. Keep the hardware in a safe location. Soften any old, hardened putty or filler by using a hot gun. Then scrape it away using a knife for putty. Reassemble the window, attach the hardware and then lubricate the pulley axles by using silicone or Teflon spray. Reinstall the parting bead, and install the upper sash.

Repair

It is essential for the homeowner to decide whether to repair or replace 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. Keeping them in good condition will also help you save money on energy. Sash windows can be susceptible to drafts and rattles. This can result in higher energy bills and even damage to the frame and the sash.

Sash windows are notoriously difficult to close and open as the traditional sliding mechanism may become displaced from its track, or even draughty. Repairing a sash windows requires extensive dismantling of the window frame, so it's best left to the professionals. With the right tools and experience, it is possible to fix an old sash window yourself. Adam shows Jess how to get started:

Making the window come apart begins by removing any security fittings in front of the lower sash. Then, you can remove the staff bead. Finally, pull out the sash at the bottom. Take the chains and cords from both sides, and knot them in a way that they can't be pulled back by the weights. The next step is to remove the upper sash. Take out the sash stops and a thin strip of wood that holds the sash. Also, take off any painted-covered hardware. Pull the sash to reveal the balancing weight, that is a massive lead or iron cylinder enclosed in a hidden cavity and secured by rope. To prevent the sash falling into the void, pierce it using a nail, and then sacrifice the weight.

Once the sashes are free clean the jamb and rails that meet, remove the glazing bars and sash cords, and remove any paint from the sash stops with the help of a utility knife. Reattach the stops once the sashes have been reinstalled. Use nails that are not large enough to damage the balancing weight.

To reassemble the sash, put the top sash into its track first, and then the lower sash. Make sure that the sash stops are aligned properly with the frame, and then reattach the beads for parting if necessary. Reattach the sash chains or cords and then install the sash pulleys.