Sash Windows Repair and Replacement

Sash windows older than 20 years can have a variety of problems such as rattles and draughts. They could also be poorly insulated. A little care can often restore them to a top level of performance.

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

Sealing

Sash windows are gorgeous in older buildings, but they require regular maintenance. They are susceptible to issues such as wet-rot, cracked putty, and draughts. Sealing, replacement or upvc repair of the windows sash is an effective way to reduce these problems and improve the efficiency of energy.

The gaps between sash frame are the primary source of drafts. They can also cause noise reduction and rattling. There are a variety of methods to stop air leaks from a sash window, including sealing beads, special products and secondary glazing.

A gap between the top and bottom of the sash and the jamb frame, is an issue that is frequent. This can lead to moisture leaking in, rotting wood and growth of mold. The gap can be sealed with caulking made of polyurethane or silicone or foam sealant.

Installing a new sash runner or spring bronze may be necessary if a gap prevents windows from opening and shutting easily. These are a type of bronze that are stapled or nailed to the edges of the lower sash in order to prevent sideways rattle. They are available from DIY stores. Tubular vinyl weather-stripping is an alternative option but it has a tendency to rip, and it can affect the appearance of a window.

It is crucial to take measurements of the entire window opening prior to installing the 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 of sash down to the sill. These measurements can be transferred to the new runners, which will ensure a perfect fitting and better operation of the window.

In older structures, the gap between frame and sash is typically wider around the leading edge. It can be draught-proofed using strips of V-strip that is self-adhesive. However it is crucial to consider this when cutting and measuring material.

A strip must be cut to the length of the sash, and with an additional inch to allow for movement. It should be cut to a square shape and then positioned so that the ends are aligned to the angle of the window sill. Make sure to use stainless steel screws since brass may rust. Also, make sure you use the highest quality polyurethane or silicone glue.

Refurbishment

The sash window is an elegant and historic feature of many homes. However, despite their beauty these windows are susceptible to a variety of problems. Common problems include rattling, stuck or draughty windows. The rotting of frames and connecting rails, broken glazing bars, or damaged weights could cause a lot of trouble. When these issues arise, it's time for an sash repair or replacement.

Refurbishment can be more expensive than replacing the sash, but can restore the appearance and function to the same level as its original state. It involves re-lining the meeting rail and sash box using traditional putty and repairing any rot damage. 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 new sash is required, it can be made from like-for-like designs to match the frame of the previous one and preserve the style of your home's historic design. This is particularly crucial for listed homes where any changes made to windows will require planning permission.

Before you put the new window in place before installing it, make sure you examine its metal tabs with those on the sash that was previously used (see below). If they are different shapes the new sash may not fit into the slots of the window frame.

It is important to decide if you want to replace or repair windows that are damaged, as each will require a different degree and amount of knowledge. For example the case of a sash windows that 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 small area or a sill has been rotting then a repair will be the better option.

Replacement

Many homeowners wish to keep their old sash window in good condition, however the deterioration of the window will eventually cause issues like rattles or draughts. Broken glass is also a possibility to occur. These issues often suggest replacement as the only logical solution. However, there are ways to improve the sash windows that go beyond replacing them, such as installing draught proofing and secondary glazing.

Consider the extent of the issue. It may not be necessary or even suitable to replace a window. A glass that is foggy, for example is typically caused by the sash, and can be addressed without having to tear out the entire frame. It is usually possible to fix a weak seal using a couple of simple solutions, rather than cutting out the entire frame and replacing it.

Sash windows are quite complicated in their design and come with many moving parts. This is why it can be difficult to fix common issues, like snapped sash cords or broken panes. The solution to these issues typically involves taking apart the window frame, which isn't something that the majority of homeowners would like to tackle themselves. This is why many homeowners choose to work with an expert.

A specialist can help restore sash windows back to their original glory, or even bring them up to modern energy standards. This can include reconditioning frames and installing secondary glass to prevent heat from escaping through the window. It can also be helpful to add a brush pile strip to stop rattling, and reduce drafts.

To begin a repair, take off the window stops. (The moldings that are in front of the lower glass). Then, loosen the staff and remove the lower window sash. Take off the cords or chains on both sides. Then take the sashweights out of the bottom cavity of the weight. Place the equipment in a secure location. Use a heat gun to soften old, hardened filler or putty. Scrape it away with the blade of a putty. Reassemble the window. Reattach the hardware. Lubricate the pulleys using Teflon or silicone spray. Install the parting beads again and then reinstall the upper sash.

Repair

It is important for the homeowner to decide whether to replace or repair their sash windows. Modern replacements have many benefits, but the original features of an older home can provide the character and value. They are also less expensive to repair rather than replace. Maintaining them in good shape can help save on energy costs. Sash windows are prone to drafts, rattles, and condensation. These problems can result in increased costs for energy and damage to the frame and the sash.

Sash windows are notoriously difficult to open and close and the standard sliding mechanism can become dislodged from its track, or even draughty. It is recommended to leave the repair of window sash to a professional, as they require extensive dismantling. However, with the right tools and know-how it is possible to fix old windows with sash yourself. Adam shows Jess how to get started:

Making the window come apart starts by removing any security fittings that are in front of the lower sash. Next, remove the staff bead, then take the sash off the bottom. Remove the chains and cords from both sides, and knot them so that they cannot be pulled back by the weights attached. It's now time to remove the upper sash. Remove the sash stops (a thin vertical strip of wood that holds the sash) and loosen any paint-encrusted hardware. The sash can be pulled back to reveal the weight balancing, that is a massive iron cylinder or lead that is enclosed in a concealed cavity and secured by a rope. To keep the sash from falling into the void hit it with nails and remove the weight.

When the sashes are untied clean the jamb and rails that meet, remove the glazing cords and sash bars, and remove any paint from the sash stops using an utility knife. Reattach the stops after the sashes are reinstalled. Use nails that are small enough not to puncture the balancing weight.

Reassemble the sash by putting the upper sash first on its track, followed by the lower sash. Make sure the sash stops are aligned properly with the frame, and then reattach the parting beads if needed. Reattach the sash chains or cords and then install the sash pulleys.