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Sash Windows Repair and Replacement

Older sash windows may be plagued by a variety of issues including draughts rattles, and poor insulation. A little attention can often restore them to a top level of performance.

First, remove the seal of paint from the window stop with an utility knife. Remove the staff bead, then pull out the upper sash, and take out any chains or cords. Keep the hardware in a bag with an identification label.

Sealing

Sash windows are beautiful in older buildings, but they require regular maintenance and are susceptible to problems like cracked putty, wet rot, and draughts. It is possible to minimize energy loss and increase the efficiency of sash windows by replacing or repairing them, or sealing them.

Draughts are usually caused by gaps between the sash and the frame. They can also trigger noise reduction and rattle. Different methods can be employed to limit air leaks within windows with sash, including sealing beads, specialty 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 sash and the sill. This can lead to moisture leaking in, rotting wood, and mold growth. The gap can be sealed with silicone or polyurethane caulking or foam sealant.

If a gap is preventing the windows from closing and opening easily, it could be necessary to replace sash runners or spring bronze. These bronze strips are stapled or nailed to the sash's lower edges to stop sideways rattling. They can be bought at DIY stores. Tubular vinyl weather-stripping is an alternative option, but it has a tendency to tear and affect the appearance of a window.

It is essential to determine the size of the window opening before installing replacement sash runner. It is best to take measurements from the top of sash up to the horizontal centerline of the rail of the meeting and from the bottom sash down to the sill. These measurements can be incorporated into the new runners, which will ensure a perfect fitting and better operation of the window.

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

A piece of material should be cut to the height of the sash, and with an additional inch for movement. It should be cut square and placed so that the ends are matched to the angle of the window sill. Make sure to use stainless steel screws since brass may get rusty. Also, use the highest quality silicone or polyurethane glue.

Refurbishment

The sash is an attractive, historical feature of many homes. These windows are beautiful however they are susceptible to problems. Rattling, draughts, sticking or leaking are common issues. The rotted frames and the rails that meet, as along with broken glazing bars, faulty frames, or rotten weights can cause issues. If you encounter any of these problems, it is time to replace or repair your sash.

Refurbishment is more costly than replacing the sash but can restore the appearance and functionality to the same level as its original state. It involves lining the meeting rail and sash box using traditional putty and fixing any rot damage. It also involves re-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's also recommended to install brush pile weather strip to reduce the rattling.

If the need for a new sash arises, it can be made from like-for-like designs to match the frame that was previously used and keep the character of your house. This is particularly important for listed buildings where any changes to windows will require planning permission.

Before putting the new window in before installing it, make sure you compare its metal tabs to the tabs on the old sash (see below). If they're different shapes, the new sash won't fit properly into the window frame slots.

If a window has been damaged, it is crucial to decide between double glazed repair or replacement because each kind of work will require a different degree of expertise and price. If a significant portion of the glass in a sash is missing, replacing it would be an alternative. However, if the glass is damaged in one small section or a sill is decaying, a repair may be the better option.

Replacement

Many homeowners want to keep their old sash windows in good shape, but deterioration will eventually cause problems like draughts or rattles. Broken glass is also a possibility to occur. This is why replacing them is often the only solution to these problems. However, there are ways to improve the sash windows beyond just replacing them, such as installing draughtproofing and secondary glazing.

It's important to consider the severity of a issue, since it might not be practical to replace an entire window. For instance, a foggy glass issue typically occurs within the sash and is usually able to be resolved without ripping out the whole frame. A weak seal can often be remedied by a few easy fixes instead of a costly full frame tear-out and replacement.

Sash windows are surprisingly complex in design and have lots of moving parts. This is why it can be a challenge to fix common issues such as 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 tackle on their own. Many homeowners choose to work with a professional due to these reasons.

A specialist can assist in restoring windows made of sash back to their original glory or even bring them up to current energy standards. This may include reconditioning frames and installing secondary glazing to stop heat out of the window. You can also add a brush-pile strip to reduce drafts and stop the window from squealing.

To begin a repair project take out the window stops (the moldings that are in front of the lower sash). Then you can loosen the staff, and pull the lower window sash. Remove the cords and chains from both sides. Finally, remove the sash weights from the bottom of the cavity and take them off. Keep the hardware in a secure place. Heat gun to soften the old, hardened filler or putty. Scrape it away with a blade made of putty. Reassemble the window. Reattach the hardware. Lubricate the pulleys using Teflon or silicone spray. Reinstall the parting bead, and reinstall upper sash.

Repair

It is crucial for the homeowner to make a choice on whether to replace or repair their sash windows. While modern replacements provide a host of benefits, the original features of an older house give character and value to the property and are often cheaper to repair glass than replacing them. Maintaining them in good shape can help save on 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 sash.

Sash windows can be difficult to open and close. The mechanism for sliding could be slack or draughty. It is recommended to leave the repair of window sash to a professional, as it requires a lot of dismantling. With the right tools and skills, it is possible to repair an the sash window that is old. Adam shows Jess how to start:

Remove any security fittings that are just in front of the lower window sash. Then, you can remove the staff bead. Then, take out the sash at the bottom. Remove the chains and cords from both sides, and knot them in such a way that they won't be pulled back by the weights. It's now time to remove the upper sash. Remove the sash stops and a thin strip of wood that holds the sash. Also, take off any painted-covered hardware. Reverse the sash to reveal the weight. It is a large iron or lead cylinder, which is tucked away inside a cavity and secured by a cord. To stop the sash falling into the void make a hole in it using nails and remove the weight.

After the sashes have been removed clean the jambs and rails that connect them. Remove the glazing bars and cords of the sash. Then, using a utility blade, remove any paint from the sash stop. When the sashes are back in place, reattach the stops using nails that are small enough to prevent cutting the balancing weight.

To reassemble the sash place the top sash on its track first, then the lower sash. Make sure the sash stoppers are properly aligned with the frame, and then reattach the beads that separate if required. Then, reconnect the sash chains or cords and then re-attach the sash pulley axles.