Sash Windows Repair and Replacement

Older sash windows suffer from a range of problems including draughts, rattles, and poor insulation. A little care can often restore them to their original performance.

First, cut off the seal of paint using 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 an identification label.

Sealing

Sash windows can look stunning in old buildings but they require regular maintenance and are 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 increase energy efficiency.

The gaps between sash frame are the primary cause of drafts. They can also cause noise reduction and rattling. There are a variety of methods to limit air leaks within the sash window, such as sealing beads, specialist products, and secondary glazing.

A common problem is a gap that exists between the top of the sash and the jamb frame, or between the bottom of sash and the sill. This can cause moisture to leak into the wood, which can cause rotting and the growth of mold. Seal the gaps with silicone, polyurethane or foam sealant.

Installing a new sash runner or spring bronze might be required when a gap is preventing windows from closing and opening easily. These are bronze strips that are stapled or nailed into the edges of the lower sash in order to prevent sideways rattle, and they can be purchased at DIY stores. Tubular vinyl weatherstripping can also be used, but it tends to rip and can detract the appearance of your window.

When installing replacement sash runners it is essential to take full measurements of the window opening. It is best to measure from the top of the sash up to the horizontal line on the meeting rail and from the bottom of sash down to the sill. These measurements can be transferred to the new runners, which will ensure a proper fitting and better operation of the window.

In older structures the gap between the frame and sash is typically larger around the leading edge. It can be draught-proofed by using a self-adhesive V-strip, but it is essential to account for this when cutting and measuring the material.

A strip must be cut to the length of the sash, and with an extra inch to allow for movement. It should be cut square and placed so that the ends are matched to the angle of the Window Doctor sill. It is also important to make use of stainless steel screws since brass can rust and the best quality silicone or polyurethane adhesive.

Refurbishment

The windows with sash are a stunning historical feature in many homes. Yet despite their beauty, windows like sash windows can be prone to a variety of problems. Rattling, draughts, sticking or leaking are typical issues. The rotted frames and the rails that meet, as well as broken glazing bars, damaged frames or weights that are rotten can cause issues. 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 however, it can restore the appearance and functionality to the same level in its original condition. Refurbishment involves re-lining both the meeting rail and the sash box using traditional putty, and repairing any damage caused by the rot. It also involves 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). In addition, window doctor it is recommended to install brush pile weather strips to lessen the rattling and increase insulation.

If a new sash is needed it can be constructed using the same style to match your old frame. This will maintain the style and character of your property. This is particularly important for buildings that are listed, as any modifications to windows require planning permission.

Compare the metal tabs on the new window with the old sash prior installing it (see below). If the tabs are different shapes, the new sash will not fit correctly into the window frame slots.

It is crucial to determine whether to replace or repair windows that are damaged, as each choice will require a different degree and level of expertise. If a large portion of the glass in a sash is missing, replacing it is an option. However, if the glass is damaged in one small section or a sill has begun rotting then a repair will be more appropriate.

Replacement

Many homeowners want to keep their old sash window in good condition, but it is inevitable that deterioration will cause problems such as rattles or draughts. Broken glass can also occur. These issues typically suggest replacement as the only logical solution. However, there are ways to improve the sash windows beyond just replacing them, including installing draught proofing as well as secondary glazing.

Consider the extent of the issue. It might not be necessary or appropriate to replace windows. A glass that is foggy, for example, is usually caused by the sash and can be fixed without tearing out the entire frame. A weak seal can be fixed with a few simple fixes instead of a costly full frame tear-out and replacement.

Sash windows are extremely complex in design and feature lots of moving parts. This is why it can be tricky to solve common issues like sash cords that are snapped or broken panes. The majority of homeowners don't want remove the window frame to fix these problems. This is why many opt to hire a professional.

A specialist can assist in restoring windows made of sash to their original splendor, or even bring them up to modern energy standards. This can include reconditioning the frames and installing secondary glazing to stop heat loss through the window. It can also be helpful to install a brush pile strip, to stop rattling, and reduce drafts.

To begin a repair, take off the window stops. (The moldings that are on the side of the lower glass). Next, remove the staff bead and take off the lower sash. Take the chains and cords from both sides. Then remove the sashweights from the bottom weight cavity. Store the hardware in a safe location. Soften any old, hardened putty or filler using a heat gun, and scrape it away using a putty knife. Reassemble the window, reattach the hardware and then lubricate the pulley axles using silicone or Teflon spray. Install the parting beads and reinstall the upper sash.

Repair

It is essential for homeowners 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 home can add authenticity and value. They are also cheaper to Upvc repair instead of replacing. Keeping them in good condition can also save energy costs. Sash windows can be susceptible to rattles and drafts. This could result in higher energy bills and damage the frame and sash.

Sash windows can be difficult to open and close. The mechanism that slides can become sloppy or become draughty. Repairing a sash window involves extensive removal of the window frame and is best left to professionals. With the right tools and skills it is possible to fix an the sash window that is old. Adam shows Jess how to start:

Making the window come apart begins by removing any security fittings in front of the lower sash. Next, take off the staff bead and pull out the bottom sash. Then, remove the cords or chains on both sides and tie them to stop them from being pulled back into the frame by the attached weights. It's now time to remove the upper sash. Remove the sash stops (a thin vertical strip of wood that is used to hold the sash) and then loosen any paint-encrusted hardware. Reverse the sash to reveal the weight. It is a massive iron or lead cylinder that is hidden in a cavity and is held by a cord. To keep the sash from falling into the void hit it with a nail and sacrifice the weight.

After the sashes have been removed, clean out the jamb and meet rails, remove the glazing cords and window doctor sash bars, and scrape off any paint from the sash stops with a utility knife. Once the sashes are returned to their original positions, you can attach the stops using nails that are not too large to risk puncturing the weight that is balancing.

To reassemble the sash put the top sash into its track first, and then the lower sash. Make sure the sash stops are in the correct alignment with the frame, and then reconnect the parting beads if needed. Finally, reattach the sash chain or cords and re-attach the axles of the sash pulleys.