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Sash Windows Repair and Replacement

Sash windows that are older than 20 years old can be afflicted with various issues, Window Doctor including draughts and rattles. They might also be inefficiently insulated. With a little effort they can be repaired to a higher level of performance.

First, remove the seal with a utility knife. Then, take off the staff bead, then take the upper sash out and remove the chains or cords and storing the hardware in a labeled bag.

Sealing

Sash windows are beautiful in older structures, but they require regular maintenance. They can be affected by issues such as 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 primary source of draughts. They can also trigger rattling and reduced sound-proofing. 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 that exists between the top of the sash and the jamb frame or between the bottom of the sill and the sash. This could cause moisture to leak into the wood, which can cause rotting and the growth of mold. Seal the gap with silicone, polyurethane, or foam sealant.

If a gap is hindering windows from opening and closing smoothly, fitting it may be necessary to install new sash runners or spring bronze. These are strips of bronze that are stapled or nailed onto the edges of the lower sash to stop sideways rattle, and they can be purchased at DIY stores. Tubular vinyl weather-stripping is another option, but it has a tendency to tear, and can affect the appearance of a window.

When replacing sash runners it is essential to measure the entire width of the window opening. It is recommended to measure from the top of the sash to the horizontal line 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 buildings there is a larger gap between the sash and the frame at the leading edge. It is possible to draught proof by a self-adhesive V-strip, but it is important to account for this when cutting and measuring the material.

The strip should be cut to the height of the sash, with an inch more on each side to allow for movement. It should be squarely trimmed and placed to match the angle of the sill. It is also crucial to use stainless steel screws as brass can rust, and high-quality polyurethane or silicone adhesive.

Refurbishment

The sash window is an elegant, historic feature of many homes. They are beautiful but they can also be susceptible to issues. Draughts, rattling or leaking are typical issues. Frames that are rotting and rails that meet, as well as broken glazing bars, defective frames or weights that are rotten can all cause problems. If you encounter any of these problems it's time to replace or repair your sash.

Refurbishment may be more expensive than replacing the sash but it will restore your sash's look and function to the same standard that it was in its original form. It involves lining the meeting 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). In addition, it is recommended to put in brush pile weather strips to lessen the rattling and increase insulation.

If you require a new sash, it can be made using similar designs to the frame of the previous one and preserve the style of your home's historic design. This is especially important for listed buildings where any changes to the windows will require planning permission.

Check the metal tabs of the new window with the old sash prior installing it (see below). If they are different shapes and sizes, the new sash will not fit in the window frame slots.

When a window is damaged it is essential to decide between repair or replacement because each type of work will require a different level of expertise and price. For instance when a sash window has a large chunk of glass missing, a replacement will be the best option. But in the event that the glass is damaged in a tiny section or a sill has been rotting then a repair will be more appropriate.

Replacement

Although many homeowners want to keep their old windows in good condition, fitting the deterioration of the windows can cause problems such as rattles, draughts, or even broken glass. These issues often suggest replacement as the only sensible solution. However, there are ways to improve sash windows, beyond simply replacing them, including installing draught proofing and secondary glazing.

Think about the scope of the issue. It might not be necessary or appropriate to replace windows. A foggy glass problem for instance, is usually caused by the sash and can be resolved without tearing out the entire frame. A leaky seal can be fixed with a few simple 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 sash cords that are snapped or broken panes. Most homeowners don't want to disassemble the window frame in order to repair these issues. Many homeowners opt to work with a professional due to these reasons.

A specialist can help restore windows with sash back to their original glory, or even bring them up to modern energy standards. This can include reconditioning frames and installing secondary glass to stop 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 shaking.

To begin a repair start by removing the window stops (the moldings on the front of the lower sash). Then loosen the staff and pull out the lower window sash. Remove the chains or cords that are on both sides. Then, remove the sashweights from the bottom of the cavity for weight. Place the hardware in a secure location. Use a heat gun to soften hardened filler or putty. Scrape it away with a putty blade. Reassemble the window. Reattach the hardware. Lubricate the pulleys with Teflon or silicone spray. Reinstall the parting beads and then reinstall the upper sash.

Repair

It is important for the homeowner to decide whether to repair or replace their sash windows. Modern replacements have many benefits, but the original features in an older house can add authenticity and value. They are also less expensive to repair than replacing. Inspecting them regularly can reduce the cost of energy. Sash windows are vulnerable to rattles, drafts and condensation. These issues can lead to higher costs for energy and damage to the frame and sash.

Sash windows can be difficult to open or close. The sliding mechanism may become sloppy or draughty. Repairing a sash window requires extensive dismantling of the frame of the window, so it's best left to a professional. But, with the right tools and knowledge it is possible to repair old windows with sash yourself. Adam shows Jess the basics:

Getting the upvc window repairs to come apart starts by removing any security fittings on the front of the lower sash. Then, take off the staff bead. Then, remove the bottom sash. Then, remove the chains or cords on both sides and knot them to prevent them being pulled back into the frame by the weights that are attached. The next step is to remove the upper sash. Remove the sash stops (a thin vertical strip of wood that holds the sash) and remove any paint-encrusted hardware. The sash should be pulled back to reveal the weight. It is a massive iron or lead cylinder, which is tucked away inside a cavity and supported by a cord. To stop the sash from falling into the void, you must 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 off the sash stops using the help of a utility knife. Reattach the stops when the sashes have been put back in place. Use nails that are small enough not to puncture the balancing weight.

To reassemble the sash place the top sash onto its track first, and then the lower sash. Verify that the sash stoppers and the frame are aligned correctly. If necessary, reattach any parting beads. Reattach the sash chains or cords and then install the sash pulleys.