Sash Windows Repair and Replacement

Sash windows older than 20 years may have many issues, including draughts and rattles. They might also be inefficiently constructed to be insulated. With a little attention they can be repaired to their original performance.

First, knock off the paint seal from the window stop with a utility knife. Remove the staff bead, then pull out the upper sash, and take out any chains or cords. Keep the hardware in a bag with the label.

Sealing

Sash windows are beautiful in older buildings, but they require regular maintenance and could be susceptible to issues such as cracked putty, wet rot, and drafts. Repair, sealing or replacement of the windows in sash is a great way to reduce these problems and improve energy efficiency.

The gaps between sash and frame are the primary cause of drafts. They can also trigger noise and rattling, which can reduce soundproofing. Sealing beads, specialty products and secondary glazing can all be used to minimize the air leakage in the sash.

A gap between the top or bottom of the sash and the jamb frame is an issue that is frequent. This can cause the leaking of moisture and rotting of the wood and the growth of mould. The gap can be closed by caulking made of silicone or polyurethane or foam sealant.

If a gap is hindering windows from closing and opening smoothly, it may be necessary to install new sash runners or spring bronze. These are a type of bronze that are stapled or nailed onto the edges of the lower sash to stop sideways rattle. They are available from DIY stores. Tubular vinyl weather-stripping is an alternative option but it is prone to tear, and can detract from 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 take measurements from the top of the sash to the horizontal line of the rails that meet, and from the bottom of the sash down to the sill. These measurements can then be transferred to new runners that will ensure the best fit and function of the window.

In older buildings, the gap between sash and frame is usually larger around the leading edge. It is possible to draught-proof it using a strip of V-strip that is self-adhesive. However it is essential to take this into consideration when measuring and cutting the material.

A piece of material should be cut to the width of the sash, with an additional inch on each side for movement. It should be squarely trimmed and positioned in accordance with the angle of the sill. It is also important to use stainless steel screws because brass is prone to rust, and a high-quality polyurethane or silicone adhesive.

Refurbishment

The windows with sash are a stunning and historic feature of many homes. Yet despite their beauty, these windows are susceptible to a myriad of issues. The most frequent issues are rattling, stuck or draughty windows. Frames that are rotting and rails that connect them, as well as broken glazing bars, faulty frames, or rotten weights can cause issues. If you are experiencing any of these problems, it is time to replace or repair your sash.

Refurbishment is more costly 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 the lining of the meeting rail as well as the sash box using traditional putty, and repairing any damage caused by decay. Re-painting the frame of the timber is also included, as is the re-glazing process 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 fit brush pile weather strips to lessen rattle and increase insulation.

If you require a new sash it can be constructed using similar designs to the old frame and maintain your property's heritage style. This is particularly important for listed properties where any changes made to windows will require planning permission.

Compare the metal tabs of the new window with those of the old sash prior installing it (see below). If they're different sizes the new sash may not fit into the slots of the window frame.

If a window is damaged, it is essential to decide between replacement or repair, since each kind of repair will involve a different level of expertise and cost. If a large part of the glass in a sash is missing replacing it is a better alternative. If the glass is only damaged in a small region or a sill has begun to decay and needs to be repaired, then a repair will be more appropriate.

Replacement

Many homeowners wish to keep their old sash window in good condition, but the deterioration of the window will eventually cause issues such as rattles or draughts. Broken glass can also occur. These issues usually suggest replacement as the only sensible solution. There are other options to improve sash window performance other than replacing them. They can be improved by installing secondary glazing and draught-proofing.

It's important to consider the severity of the problem, as it may not be feasible to replace a complete window. For instance, a fogging glass issue usually occurs within the sash and can usually be solved without tearing out the entire frame. A poor seal can also often be corrected with a few simple fixes instead of a costly full frame tear-out and replacement.

Sash windows are quite complex in design and feature many moving parts. It can be a challenge to fix common problems like cracked panes or snapped sash cable. Solving these issues usually requires dismantling the window frame, which isn't something most homeowners would want to tackle on their own. Many homeowners opt to work with a professional due to these reasons.

Specialists can restore sash window frames back to their original splendor or update them to meet modern energy standards. This can include reconditioning the frames and installing secondary glazing to stop heat out of the window. It may also be beneficial to install a brush pile strip, to stop the rattling and decrease drafts.

To begin the repair, remove the window stops. (The moldings are in front of the lower glass). Next, loosen the staff bead, then 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 place. Soften any old filler, hardened putty, or filler using a heat gun, and scrape it away with a putty knife. Reassemble the window. Reattach the hardware. Lubricate the pulleys using Teflon or silicone spray. Reinstall the parting bead, and put back the upper sash.

Repair

It is essential for the homeowner to make a decision on whether to repair or replace their sash windows. Modern replacements have many benefits however, the original features of an older house can add authenticity and value. They are also cheaper to repair than replacing. Maintaining them in good condition can also reduce the cost of energy. Sash windows can be susceptible to rattles and drafts. This can lead to higher energy bills and even damage to the frame and the sash.

Sash windows are notoriously difficult to close and open as the traditional sliding mechanism can become dislodged from its track or draughty. Repairing a sash windows requires extensive removal of the frame of the window, so it's best left to professionals. With the right tools and skills it's possible to repair an old sash window yourself. Adam shows Jess how to begin:

Getting the window to come apart begins with the removal of any security fittings that are in front of the lower sash. Then, remove the staff bead. Then, take out the sash at the bottom. Then, remove the cords or chains on both sides and knot the ends to stop them from being pulled back into the frame by the attached weights. It's time to take off the upper sash. Remove the sash stops and a thin strip of wood that holds the sash. Also, take off any painted-covered hardware. Unscrew the sash to reveal the weight balancing, which is a large iron cylinder that is encased in a hidden cavity and secured by a rope. To prevent the sash falling into the void, you must pierce it with a nail and then let the weight go.

After the sashes are removed clean the jambs as well as the rails that meet. Remove the glazing bars as well as the sash cords. Then using a utility knife, remove any paint from the sash stop. Reattach the stops after the sashes are reinstalled. Use nails that are not large enough to puncture the balancing weight.

Reassemble the sash by placing the upper sash first into its track, followed by the lower sash. Make sure the sash stoppers are aligned properly with the frame, and then reconnect the beads for parting if necessary. Then, reconnect the sash cords or chains and then re-attach upvc window repairs the sash pulley axles.