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Sash Windows Repair and Replacement

Older sash windows suffer from a range of issues including draughts rattles, and poor insulation. A little attention can often bring them back to their original performance.

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

Sealing

Sash windows are beautiful in older structures, but they require care. They can be affected by issues such as wet-rot, cracked putty, and draughts. Sealing, replacement or repair of the sash window is an effective method to minimize these issues and improve the efficiency of energy.

The gaps between sash and frame are the primary cause of drafts. They can also trigger noise reduction and rattling. Sealing beads, special products, and installing secondary glazing can be used to limit the air leakage in the sash.

A gap between the top and bottom of the sash, and the jamb frame, is an issue that is frequent. This can cause moisture to leak 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 opening and closing smoothly, it may be necessary to replace sash runners or spring bronze. These are a type of bronze that are stapled or nailed to the edges of the lower sash to stop sideways rattle, and they can be purchased at DIY stores. Weatherstripping made of tubular vinyl can also be used, but it is prone to tear and can detract the appearance of your window repairs.

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

In older structures there is a larger gap between the sash and the frame on the leading edge. It is possible to draught proof with a strip of self-adhesive Vstrip, however it is essential to consider this when cutting and measuring the material.

The strip should be cut at the top of the sash with an inch extra on each side to allow for movement. It should be cut to a square shape and then positioned in a way that the ends are aligned to the angle of the window sill. It is also important to use stainless steel screws since brass can rust and a high-quality silicone or polyurethane adhesive.

Refurbishment

The sash is an attractive historic feature in many homes. Yet despite their beauty, these windows are prone to a range of issues. Common problems include rattling, stickiness or draughts. The rotting of frames and meeting rails, broken glazing bars or faulty weights can create a mess. When these problems occur it's time to consider a sash repair or replacement.

Refurbishment is more expensive alternative than replacing the sash, but it will improve the appearance and functionality of your sash window the same or better than the original condition. Refurbishment involves the lining of the meeting rail as well as the sash box using traditional putty, and repairing any damage caused by decay. 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). Finally, it's recommended to put in brush pile weather strips to reduce the rattling and increase insulation.

If the need for a new sash arises the frame can be constructed from like-for-like designs to match the frame of the previous one and preserve your property's heritage style. This is particularly important for listed buildings where any changes to the windows need planning permission.

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

It is important to decide if you want to replace or repair windows that are damaged, as each will require a different degree and cost of expertise. If a large part of the glass in a sash is missing, replacing it is an alternative. However, if the glass has been damaged in a small area or a sill is decaying, a repair may be the better option.

Replacement

Although many homeowners want to keep their old sash windows in good working condition, the deterioration of the windows can cause problems such as draughts, rattles, or even broken glass. These issues typically point to an inevitable replacement as the only feasible solution. There are other methods to improve sash window performance rather than replacing them. This includes installing secondary glazing and draught-proofing.

Consider the extent of the problem. It may not be necessary or installing necessary to replace a window. For instance, a fogging glass issue typically occurs within the sash itself and is typically a solution without having to tear out the entire frame. A leaky seal can often be corrected by making a few minor adjustments instead of a costly full frame tear-out and replacement.

Sash windows are a complicated design with many moving parts. It can be challenging to fix common problems like cracked panes or sash cables that have snapped. The solution to these issues typically involves taking apart the window frame, which isn't something most homeowners want to take on themselves. Many homeowners decide to work with a professional due to these reasons.

A professional can help restore windows with sash back to their original glory or even bring them up to modern energy standards. This could include reconditioning frames and installing secondary glass to prevent heat from getting out of the window. You can also install a brush-pile strip in order to minimize drafts and stop the window from rattling.

To begin a repair take out the window stops (the moldings in front of the lower sash). Then, loosen the staff bead and take off the lower sash. Remove the cords and chains from both sides. Finally remove the sashweights from the bottom of the cavity for weight. Keep the hardware in a safe location. Heat gun to soften hardened filler or putty. Scrape it off with the blade of a putty. Reassemble the window, reconnect the hardware and lubricate pulley axles with silicone or Teflon spray. Reinstall the parting bead and put back the upper sash.

Repair

The choice of replacing or repairing a sash window is a crucial one for the homeowner. Modern replacements are beneficial in many ways, but the original features in an older house can add the character and value. They are also less expensive to repair instead of replacing. Maintaining them in good condition can help save on energy costs. Sash windows are susceptible to rattles and drafts. This can result in higher energy bills and damage the frame and the sash.

Sash windows can be difficult to open or close. The sliding mechanism may be slack or become draughty. It is recommended to leave the repair of window with sash to a specialist because it requires a lot of dismantling. With the right tools and skills, it is possible for you to repair the sash window that is old. Adam shows Jess the basics:

Making the window come apart starts by removing any security fittings that are in front of the lower sash. Then, remove the staff bead, then remove the bottom sash. Remove the cords and chains from both sides, and tie them in such a way that they won't be pulled back by the attached weights. It's time to take off the upper sash. Unscrew the sash stops (a thin vertical strip of wood that holds the sash) and loosen any painted-covered hardware. Reverse the sash to reveal the weight. It is a large iron or lead cylinder that is hidden in a cavity, and held by cords. To stop the sash falling into the void, make a hole in it using a nail and sacrifice the weight.

After the sashes have been removed, clean out the jamb and meet rails. remove the glazing bars and sash cords, and scrape off any paint off the sash stops using a utility knife. Reattach the stops once the sashes are reinstalled. Use nails that are small enough not to puncture the balancing weight.

Reassemble the sash by putting the upper sash on top of its track, followed by the lower sash. Make sure the sash stoppers are in the correct alignment with the frame, and reattach the beads that separate if required. Reattach the sash cords or chains and install the sash pulleys.