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Sash Windows Repair and Replacement

Older sash windows may be plagued by a variety of issues including draughts rattles, and inadequate insulation. With a little attention they can be repaired to their original performance.


First, remove the seal of paint from the window stop with the knife of a utility. Then remove the staff bead and take the upper sash out and remove the cords or chains and storing hardware in a bag marked.

Sealing

Sash windows can look stunning in old buildings, however they require regular maintenance and are susceptible to issues like cracks in putty, wet rot and draughts. Repair, sealing or replacement of the sash window is an effective method to eliminate these issues and increase energy efficiency.

The gaps between the sash and frame are the main source of drafts. They can also cause noise reduction and rattle. There are a variety of methods to stop air leaks from 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 could cause moisture to leak into the wood, rotting it and the growth of mold. The gap can be closed with caulking made of polyurethane or silicone or foam sealant.

If a gap in the window is preventing windows from closing and opening smoothly, it may be necessary to put in new spring bronze or sash runners. These are strips of bronze that are stapled or nailed to the edges of the lower sash to stop sideways rattle. They are available from DIY stores. Tubular vinyl weather-stripping is another option, but it can tear and detract from the appearance of windows.

It is important to take measurements of the entire window opening prior to installing the replacement sash runner. It is recommended to measure from the top of the sash to the horizontal line of the rail that connects it, and from the bottom of the sash to the sill. These measurements can be transferred to new runners, which will ensure an improved fit and performance of the window.

In older buildings there is a larger gap between the sash and frame at the leading edge. It is possible to draught proof by using a self-adhesive Vstrip, however it is essential to take this into consideration when cutting and measuring the material.

A piece of material should be cut to the width of the sash. There should be an extra inch each side to allow to allow for movement. It should be cut square and placed in a way that the ends are aligned to the angle of the window sill. It is also crucial to use stainless steel screws, because brass is prone to rust, and the best quality silicone or polyurethane adhesive.

Refurbishment

The sash is an attractive historical feature of a lot of homes. However, despite their beauty these windows are prone to a range of issues. Draughts, rattling, sticking or leaking are common issues. And rotting frames and connecting rails, broken glazing bars or weights that are not working properly can create a mess. When these problems occur it's time for repairs or replacements to your sash.

Refurbishment can be more expensive than replacing the sash, but it will restore the appearance and functionality to the same level that it was in its original form. Refurbishment involves lining both the meeting rail and the sash box using traditional putty and fixing any damage caused by the rot. 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 install brush pile weather strips to lessen rattle and increase insulation.

If a new sash is needed It can be made using the same design to match your old frame. This will preserve the heritage style of your house. This is especially important for buildings that are listed, as any changes to the windows need planning permission.

Compare the metal tabs on the new window to the old sash before installing it (see below). If they're different shapes, the new sash will not fit inside the slots of the window frame.

It is crucial to determine whether to replace or repair windows that are damaged, as each option will require a different level and amount of expertise. For example when a sash window has a large chunk of glass missing, a replacement will be the best choice. If the glass is damaged in a small area or a sill has begun to decay and needs to be repaired, then a repair will be better.

Replacement

While many homeowners are keen to keep their old windows in good order, deterioration can eventually cause issues such as rattles, draughts, or even broken glass. This is why replacing them is often the only solution to these issues. However, there are other ways to improve the sash windows beyond just replacing them, like installing draughtproofing and secondary glazing.

Think about the scope of the problem. It may not be necessary or even appropriate to replace a window. For example, a foggy glass issue is usually a problem within the sash and is usually able to be resolved without tearing out the entire frame. A leaky seal can be fixed by making a few minor adjustments rather than an expensive full-frame tear-out and replacement.

Sash windows are a complicated design with many moving parts. This is why it can be a challenge to fix common issues like sash cords that are snapped or broken panes. Solving these issues usually requires taking apart the window frame, which isn't something that the majority of homeowners would like to take on themselves. Because of this, many choose to work with a professional.

A specialist can assist in restoring windows made of sash to their original splendor, or even bring them up to the latest energy standards. This may include reconditioning the frames and fitting secondary glass to prevent heat from escaping through the window. It can also be helpful to install a brush pile strip, to stop the rattling and decrease drafts.

To begin a repair, take off the window stops. (The moldings are located in front of the lower glass). Next, remove the staff bead and pull out the lower sash. Remove the cords and chains from both sides. Finally, remove the sash weights and the bottom of the cavity and remove them. Place the hardware in a safe place. Heat gun to soften old, hardened filler or putty. Scrape it off with a putty blade. Reassemble the window, reconnect the hardware and lubricate the pulley axles using silicone or Teflon spray. Install the parting beads and reinstall upper sash.

Repair

The decision to repair or replace windows with sash is a major one for homeowners. Although double glazed window repairs offer a host of benefits however, the original features of a home that was built earlier give personality and value to the property and are generally less expensive to fix than replacing them. Keeping them in good condition can also save energy costs. Sash windows are susceptible to rattles, drafts and condensation, and these problems can lead to increased costs for energy and damage to the frame and the sash.

Sash windows are notoriously difficult to open and close and the standard sliding mechanism may become displaced from its track or draughty. It is best to leave the repair of window with sash to a specialist because it requires a lot of dismantling. However, with the right tools and knowledge it's possible to fix old windows using sash. Adam shows Jess the basics:

Remove any security fittings that are behind the lower window sash. Then, remove the staff bead. Then, remove the sash at the bottom. Take the chains and cords from both sides, and tie them so that they cannot be pulled back by the weights attached. It's now time to remove the upper sash. Remove the sash stops, a thin vertical strip of wood that is used to hold the sash. Also, take off any hardware that has been painted. Pull the sash back to reveal the weight. It is a large iron or lead cylinder, which is tucked away in a cavity and is supported by cords. To keep the sash from falling into the void, make a hole in it using an hammer and then sacrifice the weight.

When the sashes are untied clean the jamb and meet rails, remove the glazing bars and sash cords, and remove any paint from the sash stops using a utility knife. Reattach the stops once the sashes are reinstalled. Use nails that are small enough not to puncture the weight of the balancing.

To reassemble the sash place the top sash on its track first, then the lower sash. Verify that the sash stoppers and the frame are aligned properly. If needed, reconnect any parting beads. Reattach the sash chains or cords and then install the sash pulleys.

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