Thu. Apr 18th, 2024

Sash Windows Repair and Replacement

Older sash windows can be prone to a variety of issues, including draughts rattles, and inadequate insulation. With a little care, they can be restored to a high level of performance.

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


Sash windows can look stunning in old buildings, however they do need maintenance and are susceptible to problems like cracks in putty, wet rot, and drafts. It is possible to minimize energy loss and increase the efficiency of windows made of sash by replacing the windows, repairing or sealing them.

The gaps between the sash and frame are the main source of drafts. They can also trigger noise and rattling, which can reduce soundproofing. Sealing beads, special products, and secondary double glazing window repairs may all be used to minimize the air leakage within a Sash.

A gap between the top and bottom of the sash and the jamb frame is a common problem. This can result in moisture leaking in and rotting of the wood and the growth of mould. Seal the gap with silicone, polyurethane, or foam sealant.

Installing new sash runner or spring bronze might be necessary in the event that a gap blocks windows from closing and opening smoothly. 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 vinyl weatherstripping can also be used, however it is prone to tear and can alter the appearance of your window.

It is essential to take measurements of the entire window opening prior to installing a replacement sash runner. It is best to measure from the top of the sash 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, there is a wider gap between the sash and frame on the leading edge. It is possible to draught proof by using a self-adhesive V-strip, Sash Windows Repair but it is important to consider this when cutting and measuring the material.

A strip must be cut to the length of the sash, with an extra inch each side to allow for movement. It should be trimmed squarely and positioned to match the angle of the sill. Make sure to use stainless steel screws since brass may get rusty. Also, make sure to use the highest quality polyurethane or silicone glue.


The sash is an attractive, historical feature of many homes. These windows are gorgeous but they can also be susceptible to problems. Common issues include rattling stickiness or draughts. And rotting frames and meeting rails, broken glass bars, or damaged weights could create a mess. If these issues occur, it’s time for an sash repair or replacement.

Refurbishment can be more expensive than replacing the sash, however, it can restore the appearance and function to the same standard in its original condition. Refurbishment involves re-lining the meeting rail as well as the sash box with traditional putty and fixing any damage caused by rot. Re-painting the frame of the timber is also included, as is re-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 strip to prevent the noise of rattling.

If a replacement sash is required, it can be made with the same design to match your existing frame. This will preserve the traditional style of your home. This is particularly important for listed properties where any changes made to the windows will require planning permission.

Before putting the new window on, it’s best to examine its metal tabs with those on the old sash (see below). If they are different shapes the new sash may not fit into the slots of the window frame.

It’s important to decide whether to replace or repair windows that are damaged, as each choice will require a different level and amount of knowledge. If a large portion of the glass in the sash is missing replacing it is an alternative. If the glass is only damaged in a tiny area or a sill has begun to decay and needs to be repaired, then a repair will be better.


Many homeowners wish to keep their old sash window in good shape, but the deterioration of the window will eventually cause issues such as rattles or draughts. Broken glass can also occur. This is why replacing them is often the only solution to these problems. There are other options to improve sash window performance than simply replacing them. They can be improved by the installation of secondary glazing and draught-proofing.

Consider the extent of the problem. It might not be necessary or suitable to replace the window. A glass that is foggy, for example is typically caused by the sash and can be resolved without tearing out the entire frame. It is usually possible to repair a weak seal with a few simple solutions, Sash Windows Repair rather than cutting out the entire frame and replacing it.

Sash windows feature a complicated design with a lot of moving parts. It can be difficult to fix some common problems like broken panes or sash cables that have snapped. Most homeowners don’t want to disassemble the window frame to repair these issues. For these reasons, many choose to work with a specialist.

A professional can help restore windows made of sash back to their original glory or even bring them up to current energy standards. This may include reconditioning the frames and installing secondary glass to stop heat from escaping through the window. It is also possible to add an edge strip for brush-piles to cut down on drafts and prevent the window from rattling.

To begin a repair project start by removing the window stops (the moldings on the front of the lower sash). Next, remove the staff bead and remove the lower sash. Take off the cords or chains on both sides. Finally, remove the sashweights from the bottom cavity of the weight. Keep the hardware in a safe position. Soften any old filler, hardened putty, or filler by using a hot gun. Then scrape it away with a knife for putty. Reassemble the window, reconnect the hardware and lubricate pulley axles using silicone or Teflon spray. Install the parting beads and reinstall the upper part of the sash.


It is important for the homeowner to make a decision on whether to replace or repair their sash windows. Although modern replacements can provide numerous benefits, the original features of an older home add character and value to the property and are often cheaper to repair than replacing them. Maintaining them in good condition will also help you save money on energy. Sash windows repair near me are susceptible to drafts, rattles, and condensation, and these problems can lead to increased costs for energy and damage to the frame and the sash.

Sash windows can be a challenge to open and close. The sliding mechanism may become sloppy or even draughty. Repairing a sash window requires extensive removal of the frame of the window, so it’s best left to professionals. With the right tools and experience it is possible for you to repair the old sash window yourself. Adam shows Jess how to begin:

Getting the window to come apart begins by removing any security fittings on the front of the lower sash. Next, take off the staff bead, then remove the bottom sash. Then, pull out the chains or cords on both sides and knot the ends 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. Unscrew the sash stoppers (a thin vertical strip of wood that holds the sash) and remove any painted-covered hardware. The sash should be pulled back to reveal the weight. It is a heavy iron or lead cylinder that is concealed inside a cavity and secured by a cord. To stop the sash falling into the void hit it with a nail and sacrifice the weight.

After the sashes have been removed clean the jambs and the rails that meet. Remove the glazing bars and cords of the sash. Then using a utility knife take off any paint that is on the sash stop. When the sashes are back in place, you can reattach the stops using nails that are small enough to avoid cutting the balancing weight.

Reassemble the sash by inserting the upper sash first on its track, then the lower sash. Verify that the sash stoppers and the frame are aligned properly. If necessary, reattach any parting beads. Reattach the sash chains or cords and then install the sash pulleys.

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