Sash Windows Repair and Replacement

Sash windows that are older than 20 years can have a variety of problems that include rattles and draughts. They might also be inefficiently constructed to be insulated. A little bit of care can often bring them back to a top level of performance.

First, knock off 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. Keep the hardware in a container with an identification label.

Sealing

Sash windows can look stunning in old buildings but they do need maintenance and could be susceptible to issues such as cracks in putty, wet rot, and draughts. Sealing, replacement or repair of the windows in sash is a great way to reduce these problems and increase energy efficiency.

The gaps between the sash and frame are the primary source of draughts. They can also lead to noise and rattling, which can reduce soundproofing. Sealing beads, specialist products, and secondary glazing may be used to limit the air leakage inside the sash.

A common issue is a gap that exists between the top of the sash and the jamb frame or between the bottom of the sill and the sash. This can result in water leaking into the wood and rotting of the wood, and mould growth. Seal the gap using silicone, polyurethane or foam sealant.

If a gap is preventing the windows from opening and closing without a hitch, it might be necessary to install new sash runners or spring bronze. These bronze strips are attached by staples or nails to the lower sash edges in order to stop sideways rattling. They can be purchased at DIY stores. Weatherstripping made of tubular vinyl can also be used, however it tends to rip and can detract the appearance of your window.

It is important to measure the entire window opening prior to installing the replacement sash runner. It is recommended to take measurements from the top of the sash to the horizontal centerline of the rail that connects it 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 structures the gap between frame and sash is typically greater around the leading edge. It is possible to draught-proof it using strips of V-strip that is self-adhesive. However it is crucial to consider this when measuring and cutting material.

A strip should be cut to the length of the sash, 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 will be rusty. Also, use a high quality polyurethane or silicone glue.

Refurbishment

The sash is a beautiful historic feature in many homes. These windows are gorgeous however they are prone to problems. Common issues include rattling draughts or sticking. The rotting of frames and connecting rails, broken double glazing repair Oldham bars or weights that are not working properly can add to the inconvenience. If you experience any of these issues, it is time to replace or repair your sash.

Refurbishment can be more expensive than replacing the sash, but it will restore the appearance and function to the same level as its original state. Refurbishment involves re-lining the meeting rail as well as the sash box with traditional putty and fixing any damage caused by rot. Re-painting of the timber frame is also included, as well as double glazing repair Ruislip using traditional glass. A full refurbishment can also include adding draught proofing, double glazing repair Ruislip 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 install brush pile weather strip to minimize the noise of rattling.

If a replacement sash is needed it can be constructed using the same style to match your old frame. This will preserve the style and character of your home. This is especially crucial for listed homes where any changes to windows will require planning permission.

Compare the metal tabs on the new window with the old sash before installing it (see below). If these are different shapes the new sash won't fit properly into the window frame slots.

It is important to decide if you want to repair or replace a damaged window, as each will require a different level and level of expertise. If a significant portion of the glass in a sash is missing replacing it would be a better alternative. However when the glass is damaged in one small section or a sill has been damaged, a repair would be the better option.

Replacement

Although many homeowners want to keep their old sash windows in good working order, deterioration can eventually cause issues such as rattles, draughts, or even broken glass. This is why it's often the only solution to these problems. But there are ways to improve the sash windows beyond just replacing them, such as installing draughtproofing and secondary glazing.

Think about the scope of the problem. It may not be necessary or even appropriate to replace a window. A glass that is foggy for instance is typically caused by the sash, and can be addressed without having to tear out the entire frame. A weak seal can often be remedied by making a few minor adjustments rather than an expensive full-frame tear-out and replacement.

Sash windows are a complicated design with many moving parts. This is why it can be a challenge to fix common issues, like snapped sash cords or broken panes. The majority of homeowners don't want disassemble the window frame to repair these issues. Many homeowners choose to engage a professional for these reasons.

A professional can help restore windows made of sash back to their original glory or even bring them up to modern energy standards. This can include reconditioning the frames and fitting secondary double glazing repair Grays, to avoid heat escaping from the window. It is also possible to put in an extra strip of brush pile to stop the rattling and decrease drafts.

To begin a repair, take off the window stops. (The moldings are located in front of the lower glass). Then, loosen the staff and remove the lower window sash. Take off the chains or cords on both sides. Finally, remove the sash weights from the bottom of the weight cavity and take them off. Keep the hardware in a secure position. The heat gun will soften hardened filler or putty. Scrape it off with a putty blade. Reassemble the window. Reattach the hardware. Lubricate the pulleys by using Teflon or silicone spray. Install the parting beads and put back the upper sash.

Repair

It is crucial for homeowners to make a decision on whether to replace or repair their sash windows. While modern replacements provide numerous benefits, the original features of a home that was built earlier provide character and value to the home and are often cheaper to repair than replacing them. Maintaining them in good shape will also help you save money on energy. Sash windows are susceptible to drafts and rattles. This can lead to higher energy bills and even damage to the frame and sash.

Sash windows can be difficult to open and close. The sliding mechanism may become sloppy or even draughty. It is best to leave the repair of a window with sash to a specialist because it requires a lot of dismantling. But, with the right tools and know-how it is possible to fix old sash windows yourself. Adam shows Jess the basics:

Remove any security fittings just in front of the lower window sash. Next, remove the staff bead and remove the bottom sash. Then, pull out the cords or chains on both sides and knot them to stop them from being pulled back into the frame by the weights that are attached. Now it's time to take out the upper sash. Remove the sash stops (a thin vertical strip of wood that holds the sash) and remove any paint-encrusted 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 rope. To prevent the sash from falling into the void pierce it with an hammer and then sacrifice the weight.

After the sashes have been removed clean the jambs and meet rails. Remove the glazing bars as well as the cords of the sash. Then employing a utility blade, remove any paint from the sash stop. When the sashes are back in place, you can reattach the stops using nails that are not too large to risk cutting the balancing weight.

To reassemble the sash, place the top sash onto its track first, then the lower sash. Verify that the sash stoppers and the frame are aligned properly. If necessary, reattach any parting beads. Finally, reattach the sash chain or cords and re-attach the axles of the sash pulleys.