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Sash Windows Repair and Replacement

Sash windows older than 20 years old can be afflicted with a variety of problems such as rattles and draughts. They could also be poorly insulation. With a little care they can be repaired 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, taking off cords or chains and storing hardware in a labeled bag.

Sealing

Sash windows look gorgeous in old buildings, however they require regular maintenance and can be subject to issues like cracks in putty, wet rot, and drafts. Repair, sealing, or replacement of the windows in sash is a great method to eliminate these issues and improve the efficiency of energy.

Draughts are usually caused by gaps between the sash and the frame. They can also lead to rattling and reduced sound-proofing. Sealing beads, specialist products, and secondary glazing can all be used to minimize the air leakage inside the sash.

A common problem is a gap that exists between the top of the sash and the jamb frame or the bottom of the sill and the sash. This could cause moisture to leak into the wood, which can cause rotting and the growth of mold. Seal the gap using silicone, polyurethane or foam sealant.

Installing a new sash runner or spring bronze might be necessary in the event that a gap blocks windows from opening and shutting easily. These are bronze strips that are stapled or nailed onto the edges of the lower sash in order to prevent sideways rattle. They are available from DIY stores. Tubular weather-stripping made of vinyl is a different option but it has a tendency to rip, and it can make a difference to the appearance of windows.

When replacing sash runners, it is important to measure the entire width of the window opening. It is best to measure from the top of the sash up to the horizontal centerline on the meeting rail and from the bottom sash down to the sill. These measurements can be transferred to new runners that will ensure an improved fit and performance of the window.

In older buildings, there is a wider gap between the sash and frame around the leading edge. It can be draught-proofed by a self-adhesive Vstrip, however it is crucial to account for this when measuring and cutting the material.

The strip should be cut to the height of the sash, with an inch more on each side to allow for movement. The strip should be cut to a square shape and then positioned in a way that the ends are matched to the angle of the window sill. It is also important to use stainless steel screws, since brass can rust and Sash Windows Repair a high-quality polyurethane or silicone adhesive.

Refurbishment

The windows with sash are a stunning, historic feature of many homes. They are beautiful however they are susceptible to problems. Common problems include rattling, stickiness or draughts. The rotting of frames and meeting rails, broken glass bars, or damaged weights could add to the inconvenience. When these problems occur it's time for a sash repair or replacement.

Refurbishment can be a more costly alternative than replacing the sash itself but it will improve the appearance and functionality of your sash window to as good, if not superior to its original state. It involves lining the joining rail and sash box with traditional putty and repairing any damage caused by rot. Re-painting the frame of the timber is also included, as is re-glazing 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 prevent the noise of rattling.

If a replacement sash is needed it can be constructed using the same style to match your old frame. This will preserve the traditional style of your house. This is particularly important for listed properties where any changes made to windows will require planning permission.

Before putting the new window on, it's best to check the metal tabs against the tabs on the old sash (see below). If they're different shapes, the new sash will not fit in the window frame slots.

It is important to decide if you want to repair or replace the damaged window, since each will require a different level and amount of knowledge. If a large part of the glass in a sash is missing then replacing it will be an alternative. However, if the glass window repair has been damaged in a small area or a sill has been rotting then a repair will be the better option.

Replacement

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

It is important to determine the severity of the problem, as it may not be practical to replace an entire window. A foggy glass problem, for example, is usually caused by the sash, and can be fixed without tearing out the entire frame. It is often possible to fix a poor seal with a few 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 such as snapped sash cords or broken panes. Many homeowners do not want to take apart the window frame in order to repair these issues. Because of this, many opt to hire a specialist.

Specialists can restore sash window frames back to their original splendor or make them more up-to-date with modern energy standards. This could include reconditioning the frames and fitting secondary glazing to stop heat escaping through the window. It may also be beneficial to add an extra strip of brush pile to stop the rattling and decrease drafts.

To begin the repair, take off the window stops. (The moldings are located in front of the lower glass). Then, loosen the staff bead, then take off the lower sash. Remove the cords and chains from both sides. Then, remove the sash weights from the bottom of the weight cavity and take them off. Store the equipment in a secure location. Soften any old filler or hardened putty by using a hot gun. Then scrape it away using a putty knife. Reassemble the window. Reattach the hardware. Lubricate the pulleys with Teflon or silicone spray. Install the parting beads and reinstall upper sash.

Repair

It is essential for homeowners to decide whether to repair or replace their sash windows. While modern replacements provide numerous benefits however, the original features of an older house provide character and value to the property and are usually cheaper to fix than replacing them. Inspecting them regularly can also reduce energy costs. Sash windows are susceptible to rattles, drafts, and condensation, and these problems can result in increased energy bills and damage to the frame and sash.

Sash windows are notoriously difficult to close and open and the standard sliding mechanism can be displaced from its track or draughty. Repairing a sash windows requires extensive dismantling of the window frame and is best left to professionals. With the right tools and skills it's possible to repair an old sash window yourself. Adam shows Jess how to begin:

The process of bringing the window apart begins by removing any security fittings in front of the lower sash. Then, remove the staff bead, then remove the bottom sash. Remove the chains and cords from both sides, and tie them in such a way that they won't be pulled back by the attached weights. Now it's time to take out the upper sash. Unscrew the sash stoppers (a thin vertical strip of wood that supports the sash) and remove any paint-encrusted hardware. The sash should be pulled back to reveal the weight. It is a massive iron or lead cylinder that is concealed in a cavity and is held by cords. To keep the sash from falling into the void, pierce it with nails and remove the weight.

Once the sashes are free Clean the jamb and rails that meet, remove the glazing cords and sash bars, and remove any paint off the sash stops with the help of a utility knife. Reattach the stops after the sashes have been 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, and then the lower sash. Make sure that the sash stops are properly aligned with the frame, and reattach the beads that separate if required. Finally, reattach the sash chain or cords and re-install the axles of the sash pulleys.