Sash Windows Repair and Replacement
Sash windows that are older than 20 years can have various issues, including draughts and rattles. They could also be poorly insulation. With a little attention, they can be restored to a higher level of performance.
First, scrape off the paint seal from the window stop with a utility knife. Remove the staff bead, pull out the upper sash, and remove any cords or chains. The hardware should be stored in a bag that has a label.
Sealing
Sash windows are beautiful in older buildings, but they require maintenance. They are susceptible to problems like wet-rot cracked putty and draughts. Repair, sealing or replacement of the sash window is an effective way to reduce these problems and increase energy efficiency.
The gaps between the sash and frame are the primary cause of drafts. They can also lead to rattles and reduce sound-proofing. There are a variety of methods to reduce air leaks in a sash window, including sealing beads, special products and secondary glazing.
A common problem is a gap between the top of the sash and the jamb frame or between the bottom of sill and the sash. This can cause the leaking of moisture, rotting of the wood and growth of mould. Seal the gap with silicone, polyurethane or foam sealant.
If a gap is hindering the windows from opening and closing 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 can be purchased at DIY stores. Tubular weather-stripping made of vinyl is a different option however it can tear, and can affect the appearance of windows.
It is essential to measure the entire window opening prior to installing the new sash runners. It is recommended to take measurements from the top of the sash up to the horizontal centerline of the rails that meet, and from the bottom of the sash down to the sill. These measurements can be transferred to the new runners, which will ensure a good fit and a better performance of the window.
In older structures the gap between sash and frame is usually larger around the leading edge. It can be draught-proofed by using a self-adhesive Vstrip, however it is important to take this into consideration when cutting and measuring the material.
The strip should be cut at the top of the sash with an inch added on each side to allow movement. The strip should be cut square and placed in a way that the ends are aligned to the angle of the window sill. Use stainless steel screws since brass can rust. Also, use a high quality polyurethane or silicone glue.
Refurbishment
The sash is a stunning, historical feature of many homes. Yet despite their beauty, these windows are prone to a range of issues. Common problems include rattling, draughts or sticking. The rotted frames and the rails that connect them, as along with broken glazing bars, faulty weights or rotten frames can all cause problems. If you experience any of these issues it's time to replace or repair your sash.
Refurbishment is more expensive option than simply replacing the sash itself however, it can improve the appearance and functionality of your sash window to the same or superior to its original state. It involves lining the joining rail and sash box using traditional putty, and then repairing any rot-related damage. It also includes re-painting the timber frame 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 strip to prevent the rattling.
If a new sash is required it can be constructed from like-for-like designs to match the old frame and maintain your property's heritage style. This is especially important for listed buildings where any modifications to windows require planning permission.
Before putting the new window in place, it's best to examine its metal tabs with those on the old sash (see below). If they're different shapes and sizes, the new sash will not fit in the window frame slots.
If a window is damaged, it is essential to decide between repair or replacement, because each kind of work will require a different level of expertise and price. For example, if a sash window has a significant piece of glass that is missing, then replacement is the best choice. If the glass is only damaged in a tiny area or a sill is beginning to rot and needs to be repaired, then a repair will be better.
Replacement
While a lot of homeowners are eager to keep their old windows in good condition, the deterioration of the windows can cause issues such as draughts, rattles, or even broken glass. This is why replacing them is often the only option to solve these issues. There are other methods to improve sash window performance rather than replacing them. These include the installation of secondary glazing and draught-proofing.
It is crucial to assess the extent of a issue, since it might not be feasible to replace a complete window. For example, a foggy glass issue usually occurs within the sash and can usually be solved without tearing out the entire frame. A poor seal can also be fixed by making a few minor adjustments instead of a costly full frame tear-out and replacement.
Sash windows are quite complex in design and feature lots of moving parts. It can be challenging to fix common problems like cracked panes or snapped sash cable. Resolving these issues often requires dismantling the window frame, which isn't a job most homeowners want to tackle on their own. Many homeowners choose to work with a professional due to these reasons.
Specialists can restore sash window frames back to their original splendor or update them to meet modern energy standards. This could include reconditioning the frames and installing secondary glazing, which will stop heat loss from the window. It can also be helpful to put in an extra strip of brush pile to stop rattling, and reduce drafts.
To start a repair project take out the window stops (the moldings in front of the lower sash). Then, loosen the staff and pull the lower window sash. Take the chains and cords from both sides. Then, remove the sash weights from the bottom of the cavity and take them off. Keep the equipment in a secure place. Soften window repair , hardened putty, or filler by using a hot gun. Then scrape it away using the help of a putty knife. Reassemble the window. Reattach the hardware. Lubricate the pulleys with Teflon or silicone spray. Reinstall the parting bead and install the upper sash.
Repair
It is crucial for the homeowner to make a decision on whether to repair or replace their sash windows. While modern replacements provide a host of benefits but the original features of an older home provide character and value to the property and are often cheaper to repair than replacing them. Keeping them in good condition can help save on energy costs. Sash windows are prone to rattles, drafts, and condensation, and these problems can result in increased costs for energy and damage to the frame and sash.
Sash windows are notoriously difficult to open and close as the traditional sliding mechanism may become displaced from its track or draughty. It's best to leave the repair of window sash to a professional because it requires extensive removal. But, with the right tools and experience, it is possible to repair old windows using sash. Adam shows Jess how to begin:
Remove any security fittings that are behind the lower window sash. Then, remove the staff bead and take the sash off 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 supports the sash) and then loosen any paint-encrusted hardware. Reverse the sash to reveal the weight. It is a massive iron or lead cylinder that is concealed inside a cavity and secured by cords. To stop the sash from falling into the void pierce it using a nail, and sacrifice the weight.
When the sashes are untied, clean out the jamb and meet rails. remove the glazing bars and sash cords and scrape off any paint from the sash stops using an utility knife. Reattach the stops after the sashes have been put back in place. Use nails that are not large enough to puncture the weight of the balancing.
To reassemble the sash place the top sash on its track first, then the lower sash. Make sure the sash stops are in the correct alignment with the frame, and then reconnect the beads for parting if necessary. Finally, reattach the sash cords or chains and re-install the axles for the sash pulleys.