This Is The Ultimate Guide To Sash Windows Repair
Sash Windows Repair and Replacement
Sash windows that are older than 20 years may have various issues such as rattles and draughts. They may also be inefficiently constructed to be insulated. With a little care they can be restored to a higher level of performance.
First, knock off the seal of paint from the window stop using a utility knife. Then remove the staff bead, then take the upper sash out, taking off chains or cords, and then storing the hardware in a labeled bag.
Sealing
Sash windows are beautiful in older buildings, however they require maintenance. They are susceptible to issues such as wet-rot, cracked putty and draughts. It is possible to minimize energy loss and increase the efficiency of sash windows by replacing, repairing or sealing them.
Draughts are mostly caused by gaps between the sash and the frame. They can also trigger rattling and reduced sound-proofing. There are a variety of methods to limit air leaks within a sash window, including sealing beads, special products, and secondary glazing.
A common problem is a gap that exists between the top of the sash and the jamb frame, or between the bottom of sash and the sill. This can result in moisture leaking in, rotting of the wood and the growth of mould. The gap can be filled with silicone or polyurethane caulking or foam sealant.
If a gap is hindering the windows from closing and opening easily, it could be necessary to put in new spring bronze or sash runners. These strips of bronze are attached by staples or nails to the lower sash edges to stop the rattling of the sides. They can be bought at DIY stores. Tubular weather-stripping made of vinyl is a different option however it can rip, and it can affect the appearance of a window.
When replacing sash runners It is crucial to take full measurements of the window opening. It is recommended to measure from the top of the sash up to the horizontal centerline of the meeting rail, and from the bottom of the sash to the sill. These measurements can be transferred to the new runners, which will ensure a proper fit and better operation of the window.
In older structures, the gap between frame and sash is typically larger around the leading edge. It can be draught-proofed using a strip of V-strip which is self-adhesive. However it is crucial to take this into consideration when measuring and cutting material.
The strip should be cut at 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 aligned to the angle of the window sill. It is also crucial to make use of stainless steel screws because brass is prone to rust, and high-quality polyurethane or silicone adhesive.
Refurbishment
The sash is a beautiful historical feature of a lot of homes. These windows are beautiful, but they can be susceptible to issues. Common issues include rattling stuck or draughty windows. And rotting frames and meeting rails, broken glazing bars or weights that are not working properly can add to the inconvenience. When these issues arise, it's time to consider a sash repair or replacement.
Refurbishment can be a more costly alternative than replacing the sash itself, but it will bring back the appearance and function of your sash window to as good, if not better than its original state. Refurbishment involves the lining of both the meeting rail and the sash box using traditional putty, and repairing any damage caused by the rot. It also includes 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's also recommended to install brush pile weather strip to minimize rattling.
If a replacement sash is needed It can be made using the same design to match your old frame. This will maintain the style and character of your property. This is particularly important for listed buildings where any modifications made to the windows will require planning permission.
Before putting the new window in place It is recommended to examine its metal tabs with those on the sash that was previously used (see below). If they're different shapes, the new sash will not fit in the window frame slots.

If a window has been damaged, it is essential to decide between repair or replacement because each type of work will require a different level of expertise and price. If a large portion of the glass in a sash is missing, replacing it would be a better alternative. If the glass is only damaged in a small region or a sill is beginning to rot, then a repair would 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 is also a possibility to occur. These issues typically point to an inevitable replacement as the only logical solution. There are other options to improve the performance of sash windows other than replacing them. This includes installing secondary glazing and draughtproofing.
It is crucial to assess the extent of a issue, since it might not be feasible to replace the entire window. Foggy glass for instance, is usually caused by the sash and can be fixed without tearing out the entire frame. A weak seal can be fixed by a few easy fixes rather than an expensive full-frame tear-out and replacement.
Sash windows feature a complicated design with many moving parts. This is why it can be a challenge to fix common issues, like snapped sash cords or broken panes. Many homeowners do not want to take apart the window frame in order to fix the issues. Because of this, many choose to work with a specialist.
window repair can assist in restoring windows with sash back to their original glory or even bring them up to current energy standards. This could include reconditioning frames and fitting secondary glass to stop heat from getting out of the window. It is also possible to put in a brush pile strip to stop rattling, and reduce drafts.
To begin a repair, remove the window stops. (The moldings that are on the side of the lower glass). Then, loosen the staff and pull out the lower window sash. Take off the chains or cords on both sides. Finally, disconnect the sash weights from bottom of the cavity and take them off. Keep the hardware in a safe position. The heat gun will soften hardened filler or putty. Scrape it off with a putty blade. Reassemble the window. Reattach the hardware. Lubricate the pulleys using Teflon or silicone spray. Reinstall the parting beads and then reinstall the upper sash.
Repair
It is important for the homeowner to make a decision on whether to replace or repair their sash windows. Modern replacements have many benefits, but the original features in an older house can add character and value. They are also less expensive to repair than replacing. Inspecting them regularly can reduce the cost of energy. Sash windows are prone to drafts, rattles, and condensation. These problems can lead to increased costs for energy and damage to the frame and the sash.
Sash windows can be difficult to open and close. The mechanism for sliding could be slack or draughty. It is best to leave the repair of a window sash to a professional because they require extensive removal. With the right tools and know-how it is possible to repair old windows with sash yourself. Adam shows Jess the basics:
Remove any security fittings that are in front of the lower window sash. Next, take off the staff bead, then remove the bottom sash. Then, remove the cords or chains on both sides and knot them to stop them from being pulled back into the frame by the weights attached to them. It's now time to take out the upper sash. The sash stops must be removed and a thin strip of wood that is used to hold the sash. Also, remove any painted-covered hardware. Reverse the sash to reveal the weight. It is a large iron or lead cylinder, which is tucked away in a cavity, and supported by cords. To stop the sash from falling into the void, pierce it with a nail and then sacrifice the weight.
After the sashes are removed clean the jambs and rails that connect them. Remove the glazing bars and the cords for the sash. Then using a utility knife take off any paint from the sash stop. Reattach the stops after the sashes have been reinstalled. Use nails that are not large enough to damage the balancing weight.
Reassemble the sash by putting the upper sash first on its track, then the lower sash. Make sure that the sash stops are properly aligned with the frame, and then reattach the beads for parting if necessary. Finally, reattach the sash chains or cords and re-install the sash pulley axles.