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Sash Windows Repair and Replacement

Older sash windows may suffer from a range of issues, including draughts rattles, and poor insulation. With a little effort, they can be restored to a high level of performance.

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

Sealing

Sash windows are beautiful in older buildings, but they do need maintenance and can be subject to issues like cracks in putty, wet rot and draughts. Sealing, replacement or repair of the windows in sash is a great way to reduce these problems and increase energy efficiency.

The gaps between sash and frame are the main source of drafts. They can also cause noise and rattling, which can reduce soundproofing. Sealing beads, specialist products, and secondary glazing can be used to limit the air leakage in a sash.

A common issue is a gap between the top of the sash and the jamb frame or the bottom of the sill and the sash. This can lead to moisture leaking into the wood, rotting it, and mold growth. The gap can be filled with caulking made of polyurethane or silicone or foam sealant.

If a gap in the window is preventing the windows from closing and opening smoothly, it may be necessary to install new sash runners or spring bronze. These are strips of bronze that are stapled or nailed to the edges of the lower sash to prevent sideways rattle, and they can be purchased from DIY stores. Tubular vinyl weatherstripping can also be used, however it is more likely to tear and can detract the appearance of your window repair..

When replacing sash runners It is crucial to measure the entire width of the window opening. It is best to measure from the top of the sash to the horizontal line of the rails that meet, and from the bottom of the sash down to the sill. These measurements can then be transferred to new runners which will ensure a better fit and operation of the window.

In older structures the gap between the frames and sash is typically wider around the leading edge. It can be draught proofed by using 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 length of the sash, and with an additional inch on each side for movement. It should be trimmed squarely and positioned to match the angle of the sill. Make sure to use stainless steel screws since brass may be rusty. Also, make sure you use the highest quality polyurethane or silicone glue.

Refurbishment

The windows with sash are a stunning and historic feature of many homes. But despite their beauty, windows like sash windows can be prone to a variety of problems. Common problems include rattling, stuck or draughty windows. And rotting frames and meeting rails, broken glazing bars or faulty weights can add to the inconvenience. If you experience any of these problems, it is time to replace or repair your sash.

Refurbishment is more costly than replacing the sash however, it can bring back the appearance and function to the same standard that it was in its original form. It involves re-lining the meeting rail and sash box using traditional putty, and then repairing any damage caused by rot. 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 install brush pile weather strip to reduce the noise of rattling.

If a replacement sash required, it can be made using the same style to match your existing frame. This will preserve the heritage style of your house. This is especially important for listed buildings where any modifications made to windows will require planning permission.

Before putting the new window in before installing it, make sure you compare its metal tabs to the tabs on the old sash (see below). If they're different shapes and sizes, the new sash will not fit inside the slots of the window frame.

When a window is damaged it's essential to choose between repair or replacement, because each type of work will require a different level of expertise and cost. For example when a sash window has a large chunk of glass that is missing, then replacement is the best option. However, if the glass is damaged in a tiny section or a sill has been rotting then a repair will be the better option.

Replacement

While a lot of homeowners are eager to keep their old windows in good condition, deterioration could eventually result in problems like rattles, draughts or even broken glass. This is why replacing sash windows is often the only solution to these problems. There are other methods to improve the performance of sash windows other than replacing them. This includes installing secondary glazing and draughtproofing.

Take note of the severity of the issue. It might not be necessary or appropriate to replace windows. For example, a foggy glass issue usually occurs within the sash and is usually able to be resolved without tearing out the entire frame. It is often possible to repair a weak seal using a couple of simple fixes, rather than ripping out the entire frame and reinstalling it.

Sash windows have a complex design that has many moving parts. This is why it can be a challenge to solve common issues like sash cords that are snapped or broken panes. Most homeowners don't want to remove the window frame in order to repair these issues. Because of this, many choose to work with an expert.

Specialists can restore sash window frames back to their original glory or update them to meet the latest energy standards. This may include reconditioning frames and fitting secondary glazing to stop heat escaping out of the window. It is also possible to add a brush pile strip, to stop the rattling and decrease drafts.

To begin a repair start by removing the window stops (the moldings that are in front of the lower sash). Then, loosen the staff and remove the lower window sash. Remove the cords or Sash Windows Repair chains on both sides. Finally, remove the sash weights and the bottom of the weight cavity and take them off. Keep the hardware in a safe location. The heat gun will soften the old, hardened filler or putty. Scrape it off with a putty blade. Reassemble the window. Reattach the hardware. Lubricate the pulleys by using Teflon or silicone spray. Install the parting beads and put back the upper sash.

Repair

It is essential for homeowners to make a choice on whether to repair or replace their sash windows. While modern replacements provide numerous benefits however, the original features of a home that was built earlier provide character and value to the property and are usually cheaper to repair than replacing them. Maintaining them in good condition can lower the energy cost. Sash windows are susceptible to rattles, drafts and condensation. These problems can result in increased cost of energy and damage to the frame and sash.

Sash windows can be difficult to open and close. The mechanism that slides can be slack or even draughty. It is best to leave the repair of a sash windows to professionals because it requires extensive dismantling. However, with the right tools and know-how, it is possible to repair old windows using sash. Adam shows Jess how to start:

The process of bringing the window apart starts with the removal of any security fittings on the front of the lower sash. Then, remove the staff bead. Finally, pull out 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. It's now time to remove the upper sash. Remove the sash stops (a thin vertical strip of wood that holds the sash) and then loosen any paint-encrusted hardware. The sash should be pulled back to reveal the weight. It is a heavy iron or lead cylinder that is hidden in a cavity, and held by cords. To stop the sash from falling into the void, you must pierce it using a nail, and sacrifice the weight.

Once the sashes are free clean the jamb and rails that meet, remove the glazing bars and sash cords and strip any paint off the sash stops using a utility knife. When the sashes are back in place, you can reattach the stops using nails that are small enough to avoid cutting the balancing weight.

Reassemble the sash by inserting the upper sash first on its track, followed by the lower sash. Check that the sash stops and the frame are properly aligned. If necessary, reattach any beads that are parting. Reattach the sash chains or cords and attach the sash pulleys.