Sash Windows Repair and Replacement

Older sash windows be plagued by a variety of issues including draughts rattles and poor insulation. With a little effort, they can be restored to a high level of performance.

First, cut off the paint seal using an utility knife. Remove the staff bead, pull out the upper sash, and take off any chains or cords. Store the hardware in a bag that has an identification label.

Sealing

Sash windows are gorgeous in older buildings, however they require regular maintenance. They can be affected by issues such as wet-rot, cracked putty and draughts. Repair, sealing, or replacement of the windows sash is an effective way to reduce these problems and improve energy efficiency.

Draughts are mostly caused by gaps between the sash and the frame. They can also lead to rattling and reduced sound-proofing. Various methods can be used to limit air leaks within the sash window, such as sealing beads, special products and secondary glazing.

A common issue is a gap between the top of the sash and the jamb frame or between the bottom of sill and the sash. This can lead to moisture leaking in the wood, rotting and growth of mould. The gap can be filled by caulking made of silicone or polyurethane or foam sealant.

If a gap is hindering windows from closing and opening easily, it could be necessary to put in new sash runners or spring bronze. These are bronze strips that are stapled or nailed into the edges of the lower sash in order to prevent sideways rattle. They can be purchased at DIY stores. Tubular weather-stripping made of vinyl is a different option however it has a tendency to tear and affect the appearance of a window.

When replacing sash runners It is crucial to measure the entire width of the window opening. It is recommended to measure from the top of the sash to the horizontal centerline of the rails that meet, and from the bottom of the sash down to the sill. These measurements can later be transferred to new runners, which will ensure the best fit and function of the window.

In older buildings the gap between frames and sash is typically larger around the leading edge. It can be draught-proofed using a strip of V-strip which is self-adhesive. However it is crucial to take this into account when measuring and cutting material.

A piece of material should be cut to the height of the sash, with an additional inch on each side for movement. It should be squarely trimmed and positioned to match the angle of the sill. It is also crucial to use stainless steel screws, since brass can rust and high-quality silicone or polyurethane adhesive.

Refurbishment

The sash is a beautiful, historical feature of many homes. But despite their beauty, windows like sash windows can be prone to a range of issues. Common problems include rattling, stuck or draughty windows. The rotting of frames and meeting rails, broken glazing bars or faulty weights can create a mess. If you encounter any of these problems, it is time to replace or repair your sash.

Refurbishment can be more expensive than replacing the sash but can restore your sash's look and function to the same standard that it was in its original form. Refurbishment involves re-lining the meeting rail as well as the sash box with traditional putty and fixing any damage caused by the rot. Re-painting the frame of the timber is also included, as is re-double glazing repairs Potters Bar 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 minimize rattling.

If a new sash is required It can be made using the same style to match your existing frame. This will help preserve the heritage style of your house. This is especially important for listed properties where any modifications made to windows will require planning permission.

Before putting the new window in, it's best to examine its metal tabs with those on the sash that was previously used (see below). If they're different shapes, the new sash will not fit properly into the window frame slots.

If a window has been damaged, it's essential to choose between repair or replacement because each type of work will require a different level of expertise and cost. If a significant portion of the glass in a sash is missing then replacing it will be a better alternative. However in the event that the glass is damaged in a tiny section or a sill is rotting then a repair will be more appropriate.

Replacement

Many homeowners would like to keep their old sash windows in good shape, but it is inevitable that deterioration will cause problems like rattles or draughts. Broken glass is also a possibility to occur. These issues usually suggest replacement as the only logical solution. There are other methods to improve the performance of sash windows rather than replacing them. They can be improved by installing secondary glazing and draughtproofing.

Consider the extent of the problem. It might not be necessary or even suitable to replace a window. A foggy glass problem, for example, is usually caused by the sash and can be addressed without having to tear out the entire frame. It is often possible to fix a weak seal by making a few easy solutions, rather than cutting out the entire frame and replacing it.

Sash windows are surprisingly complex in design and have many moving parts. This is why it can be tricky to remedy some common problems such as snapped sash cords or broken panes. The majority of homeowners don't want disassemble the window frame to fix these problems. This is why many homeowners choose to work with a specialist.

A professional can help restore sash windows to their original splendor or even bring them up to modern energy standards. This may include reconditioning the frames and fitting secondary glass to stop heat from getting out of the window. It can also be helpful to add an extra strip of brush pile to stop rattling, and reduce drafts.

To begin a repair, remove the window stops. (The moldings that are on the side of the lower glass). Next, loosen the staff bead, then remove the lower sash. Remove the chains or cords that are on both sides. Finally, remove the sash weights from bottom of the weight cavity and remove them. Keep the hardware in a safe location. Soften any old filler or hardened putty using a heat gun, and scrape it away with a knife for putty. Reassemble the window, reconnect the hardware and lubricate pulley axles using silicone or Teflon spray. Reinstall the parting bead and reinstall upper sash.