Sash Windows Repair and Replacement
Sash windows that are older than 20 years old can be afflicted with various issues, including draughts and rattles. They might also be poorly constructed to be insulated. With a little effort, they can be restored to their original performance.
First, scrape off the paint seal from the window stop using a utility knife. Remove the staff bead, then pull out the upper sash and take out any chains or cords. Keep the hardware in a container with the label.
Sealing
Sash windows look stunning in older structures, but they require maintenance. They are susceptible to issues like wet-rot, cracked putty and draughts. It is possible to reduce energy loss and improve the efficiency of sash windows by replacing or repairing them, or sealing them.
The gaps between sash and frame are the main source of draughts. They can also lead to rattling and reduced sound-proofing. Different methods can be employed to stop air leaks from the sash window, such as sealing beads, specialty products and secondary glazing.
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 in, rotting wood and the growth of mold. The gap can be filled 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 attached by staples or nails to the lower sash edges to prevent sideways rattling. They are available at DIY stores. Weatherstripping made of tubular vinyl can also be used, however it tends to rip and can alter the appearance of your window.
It is crucial to measure the entire window opening prior to installing a replacement sash runner. It is recommended to measure from the top of the sash up to the horizontal centerline of the rail that connects it, and from the bottom of the sash down to the sill. These measurements can be transferred to the new runners, which will help ensure a proper fitting and better operation of the window.
In older structures, the gap between frame and sash is typically greater around the leading edge. It can be draught-proofed by using a strip of V-strip which is self-adhesive. However, it is important to take this into consideration when measuring and cutting material.
The strip should be cut at the top of the sash and with an inch added on each side to allow movement. It should be trimmed squarely and positioned to match the angle of the sill. Use stainless steel screws since brass will get rusty. Also, make sure to use high-quality silicone or polyurethane glue.
Refurbishment
The sash is a stunning historic feature in many homes. These windows are beautiful but they can also be susceptible to issues. window repairs include rattling stuck or draughty windows. Also, rotting frames, meeting rails, broken glass bars, or damaged weights could cause a lot of trouble. When these issues arise, it's time to consider an sash repair or replacement.
Refurbishment is a more expensive option than simply replacing the sash itself however, it can restore the look and function of your sash window the same or superior to its original state. It involves lining the meeting rail and sash box with traditional putty and repairing any damage caused by rot. It also involves painting the frame with timber and reglazing 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 strip to prevent the rattling.
If a new sash is required it can be constructed using similar designs to the frame that was previously used and keep the style of your home's historic design. This is especially important for buildings that are listed, as any changes to the windows require planning permission.
Before you put the new window on before installing it, make sure you examine its metal tabs with the tabs on the old sash (see below). If these are different shapes the new sash will not fit properly into the slots of the window frame.
It's important to decide whether to replace or repair a damaged window, as each will require a different level and amount of expertise. For instance the case of a sash windows that has a large piece of glass missing then replacing it is 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
Many homeowners want to keep their old sash window in good condition, but it is inevitable that deterioration will cause problems such as rattles or draughts. Broken glass can also occur. This is why replacing them is often the only option to solve these issues. However, there are other ways to improve sash windows, beyond simply replacing them, such as installing draught proofing and secondary glazing.
It's important to consider the severity of a issue, as it may not be appropriate or even practical to replace an entire window. For example, a foggy glass issue usually occurs within the sash itself and is typically a solution without having to tear out the entire frame. A weak seal can often be corrected by a few easy fixes instead of a costly full frame tear-out and replacement.
Sash windows are quite complex in design and feature many moving parts. This is why it can be difficult to remedy some common problems, like snapped sash cords or broken panes. Many homeowners do not want to take apart the window frame to fix these problems. For these reasons, many opt to hire a professional.
Specialists can restore sash window frames to their original splendor or make them more up-to-date with modern energy standards. This may include reconditioning frames and installing secondary glazing, to avoid heat from the window. It is also possible to add 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, remove the staff bead and take off the lower sash. Remove the cords or chains on both sides. Finally, disconnect the sash weights from bottom of the cavity and remove them. Store the hardware in a safe place. Soften any old filler, hardened putty, or filler with a heat gun and scrape it off with a knife for putty. Reassemble the window, reconnect the hardware and lubricate the pulley axles with silicone or Teflon spray. Install the parting beads and install the upper sash.
Repair
It is crucial for homeowners to make a choice on whether to replace or repair their sash windows. While modern replacements provide numerous 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 repair than replacing them. Maintaining them in good condition can also lower energy costs. Sash windows can be prone to drafts and rattles. This can lead to more expensive energy bills and can damage the frame and the sash.
Sash windows are notoriously difficult to close and open and the standard sliding mechanism may become displaced from its track or draughty. Repairing a sash window requires extensive removal of the window frame and is best left to the professionals. With the right tools and experience it is possible to fix old sash windows yourself. Adam shows Jess the basics:
Making the window come apart begins by removing any security fittings on the front of the lower sash. Then, remove the staff bead and take the sash off the bottom. Then, take the cords or chains on both sides, and tie them to prevent them being pulled back into the frame by the weights that are attached. It's time to take off the upper sash. Remove the sash stops and a thin strip of wood that holds the sash. Also, remove any hardware that has been painted. The sash can be pulled back to reveal the balancing weight that is a massive lead or iron cylinder enclosed in a hidden cavity and anchored by a rope. To keep the sash from falling into the void hit it with nails and remove the weight.
When the sashes are untied Clean the jamb and meet rails. remove the glazing bars and sash cords and scrape off any paint from the sash stops using the help of a utility knife. Reattach the stops when the sashes are reinstalled. Use nails that are small enough not to puncture the balancing weight.
Reassemble the sash by placing the upper sash first on its track, then the lower sash. Make sure the sash stops are in the correct alignment with the frame, and reattach the beads that separate if required. Then, reconnect the sash chains or cords and re-install the sash pulley axles.