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Sash Windows Repair and Replacement

Sash windows that are older than 20 years may have various issues that include rattles and draughts. They might also be poorly insulation. A little care can often bring them back to a high standard of performance.

First, scrape off the seal of paint from the window stop using the knife of a utility. Then, take off the staff bead, then remove the upper sash, lock taking off cords or chains and storing hardware in a bag marked.

Sealing

Sash windows look gorgeous in old buildings, however they do need maintenance and could be susceptible to issues such as cracks in putty, wet rot and drafts. It is possible to minimize energy loss and improve the efficiency of sash windows by replacing the windows, repairing or sealing them.

Draughts are mainly caused by gaps between the sash and the frame. They can also cause noise reduction and rattle. Different methods can be employed to limit air leaks within windows with sash, including sealing beads, specialist products, and lock 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 lead to moisture leaking into the wood, rotting it and growth of mold. The gap can be filled with caulking made of polyurethane or silicone or foam sealant.

Installing a new sash runner or lock spring bronze might be required when a gap is preventing the windows from opening and shutting easily. These are a type of bronze that are stapled or nailed onto the edges of the lower sash to stop sideways rattle. They are available at DIY stores. Tubular vinyl weatherstripping can also be used, however it is more likely to tear and may alter the look of your window.

When installing replacement sash runners it is essential to take full measurements of the window opening. It is best to measure from the top of the sash up to the horizontal centerline of the meeting rail, and from the bottom of the sash down to the sill. These measurements can be transferred to new runners which will ensure a better fit and operation of the window.

In older buildings the gap between frame and sash is typically wider around the leading edge. It can be draught proofed with a strip of self-adhesive V-strips, but it is important to consider this when cutting and measuring the material.

A strip must be cut to the height of the sash, and with an extra inch each side to allow to allow for movement. The strip should be cut square and positioned so that the ends are matched to the angle of the window sill. Make sure to use stainless steel screws since brass can be rusty. Also, use the highest quality polyurethane or silicone glue.

Refurbishment

The sash is an attractive historic feature in many homes. These windows are beautiful however they are susceptible to issues. Draughts, rattling or leaking are common issues. Also, rotting frames, connecting rails, broken glazing bars or weights that are not working properly can create a mess. If you are experiencing any of these problems it's time to replace or repair your sash.

Refurbishment can be a more costly option than simply replacing the sash, however, it can restore the look and function of your sash window as good if not superior to its original state. It involves lining the meeting rail and sash boxes with traditional putty and repairing any damage caused by rot. Re-painting of the timber frame is also included, as is 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 put in brush pile weather strips to lessen rattling and improve insulation.

If a replacement sash is required it can be constructed using the same design to match your existing frame. This will maintain the heritage style of your property. This is especially crucial for listed homes where any changes made to the windows will require planning permission.

Check the metal tabs of the new window to the old sash prior to installing it (see below). If they're different shapes the new sash may not fit in the slots of the window frame.

It is important to decide if you want to repair or replace windows that are damaged, as each option will require a different degree and level of knowledge. For example, if a sash window has a large chunk of glass that is missing, then replacement is the best choice. However when the glass is damaged in a small area or a sill has begun decaying, a repair may be more appropriate.

Replacement

While a lot of homeowners are eager to keep their old windows in good condition, deterioration could eventually cause issues such as draughts, rattles, or even broken glass. These issues often suggest replacement as the only feasible solution. There are other methods to improve the performance of sash windows rather than replacing them. They can be improved by installing secondary glazing and draught-proofing.

Consider the extent of the issue. It might not be necessary or necessary to replace a window. A foggy glass problem, for example is typically caused by the sash and can be fixed without tearing out the entire frame. A weak seal can often be remedied with a few simple fixes instead of a costly full-frame tear-out and replacement.

Sash windows are quite complex in design and have lots of moving parts. This is why it can be a challenge to remedy some common problems, like snapped sash cords or broken panes. Solving these issues usually requires dismantling the window frame, which isn't a job most homeowners would want to take on themselves. This is why many homeowners choose to work with a specialist.

Specialists can restore sash window frames back to their original glory or update them to meet the latest energy standards. This can include reconditioning frames and installing secondary glass to block heat from getting out of the window. It is also possible to add a brush-pile strip to reduce drafts and stop the window from squealing.

To begin a repair window, remove the window stops. (The moldings are in front of the lower glass). Then you can loosen the staff, and pull out the lower window sash. Take the chains and cords from both sides. Finally, remove the sash weights from the bottom of the weight cavity and take them off. Place the equipment in a secure place. Use a heat gun to soften the old, hardened filler or putty. Scrape it away with a blade made of putty. Reassemble the double glazed window repair, attach the hardware and then lubricate the pulley axles using silicone or Teflon spray. Reinstall the parting bead and install the upper sash.

Repair

It is essential for homeowners to make a decision on whether to repair or replace their sash windows. Although modern replacements offer a host of benefits but the original features of an older home provide personality and value to the property and are often cheaper to fix than replacing them. Maintaining them in good condition can also lower energy costs. Sash windows are prone to rattles, drafts, and condensation, and these problems can lead to increased energy bills and damage to the frame and the sash.

Sash windows can be difficult to open or close. The sliding mechanism may be slack or draughty. Repairing a sash windows requires extensive dismantling of the frame of the window, so it's best left to a professional. However, with the right tools and know-how it's possible to fix old sash windows yourself. Adam shows Jess the basics:

Remove any security fittings just in front of the lower window sash. Then, you can remove the staff bead. Then, remove the sash at the bottom. Then, take the cords or chains on both sides and knot them to prevent them being pulled back into the frame by the weights attached to them. Now it's time to take out the upper sash. The sash stops must be removed and a thin wood strip that holds the sash. Also, take off any hardware that has been painted. The sash should be pulled back to reveal the weight. It is a large iron or lead cylinder that is concealed inside a cavity and secured by an elastic cord. To prevent the sash falling into the void, you must pierce it using a nail, and then sacrifice the weight.

After the sashes are removed clean the jambs and meet rails. Remove the glazing bars and cords of the sash. Then using a utility knife, remove any paint from the sash stop. When the sashes are back in place, you can reattach the stops using nails that are not too large to risk damaging the balancing weight.

To reassemble the sash put the top sash into its track first, and then the lower sash. Check that the sash stops and the frame are aligned properly. If necessary, reattach any beads that are parting. Finally, reattach the sash chains or cords and re-attach the axles for the sash pulleys.