Sash Windows Repair and Replacement
Sash windows older than 20 years old can be afflicted with many issues that include rattles and draughts. They could also be inefficiently insulated. A little care can often bring them back to a top level of performance.
First, knock off the paint seal from the window stop using an utility knife. Remove the staff bead, pull out the upper sash, and take out any chains or cords. Store the hardware in a bag that has an identification label.
Sealing
Sash windows are beautiful in older buildings, but they require maintenance and can be subject to problems like wet rot, cracked putty and draughts. Sealing, replacement or repair of the sash window is an effective method to minimize these issues and increase energy efficiency.
Draughts are usually caused by gaps between the sash and the frame. They can also cause rattles and reduce sound-proofing. Sealing beads, special products and secondary glazing can be used to limit the air leakage in the shutter.
A common problem is a gap between the top of the sash and the jamb frame or the bottom of the sill and the sash. This can lead to the leaking of moisture and rotting of the wood and growth of mould. The gap can be filled with caulking made of polyurethane or silicone or foam sealant.
If a gap is preventing the windows from closing and opening without a hitch, it might be necessary to put in new spring bronze or sash runners. These strips of bronze are tied or stapled to the lower sash edges in order to prevent sideways rattling. They can be bought at DIY stores. Tubular weather-stripping made of vinyl is a different option however it is prone to rip, and it can make a difference to the appearance of a window.
When replacing sash runners, it is important to measure the entire width of the window opening. It is best to measure from the top of the sash to the horizontal centerline of the meeting rail, and from the bottom of the sash down to the sill. These measurements can be transferred to new runners, which will ensure a better fit and operation of the window.
In older buildings, the gap between frame and sash is typically larger around the leading edge. It can be draught-proofed by using a strip of V-strip which is self-adhesive. However, it is important to take this into account when cutting and measuring material.
A strip must be cut to the width of the sash, with an additional inch to allow movement. It should be trimmed squarely and positioned to match the angle of the sill. Make sure to use stainless steel screws since brass can get rusty. Also, make sure you use the highest quality silicone or polyurethane glue.
Refurbishment
The windows with sash are a stunning, historic feature of many homes. These windows are gorgeous, but they can be prone to problems. Common problems include rattling, draughts or sticking. Also, rotting frames, meeting rails, broken glass bars or faulty weights can cause a lot of trouble. If you encounter any of these problems it's 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 as its original state. It involves re-lining the meeting rail and sash boxes with traditional putty and repairing any damage caused by rot. It also includes re-painting the frame of timber 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). It is also recommended to install brush pile weather strip to reduce the rattling.
If a replacement sash is required it can be constructed using the same style to match the frame you have. This will help preserve the traditional style of your property. This is particularly crucial for listed buildings, where any changes to the windows require planning permission.
Before you put the new window in It is recommended to compare its metal tabs to those on the old sash (see below). If they're different shapes, the new sash won't fit in the window frame slots.
When a window is damaged it is essential to decide between replacement or repair, because each type of work will require a different level of expertise and price. If a large part of the glass in the sash is missing replacing it would be the better alternative. However in the event that the glass is damaged in one small section or a sill has been damaged, a repair would be more appropriate.
Replacement
While many homeowners are keen to keep their old sash windows in good working condition, deterioration could eventually cause problems such as rattles, draughts, or even broken glass. These issues usually point to an inevitable replacement as the only feasible solution. But there are ways to improve the sash windows beyond just replacing them, including installing draughtproofing and secondary glazing.
It is important to determine the severity of the problem, as it may not be appropriate or even practical to replace an entire window. For instance, a foggy glass issue usually occurs in the sash itself and is usually able to be resolved without tearing out the entire frame. It is usually possible to fix a poor seal with a few simple fixes, rather than tearing out the entire frame and replacing it.
Sash windows have a complex design with many moving parts. This is why it can be difficult to solve common issues like sash cords that are snapped or broken panes. The solution to these issues typically involves removal of the window frame which isn't a job most homeowners would want to tackle themselves. This is why many homeowners choose to work with a professional.
Specialists can restore sash window frames to their original splendor or update them to meet the latest energy standards. This can include reconditioning frames and installing secondary glass to stop heat from getting out of the window. You can also install a brush-pile strip to reduce drafts and prevent the window from rattling.
To start a repair project start by removing the window stops (the moldings in front of the lower sash). Next, loosen the staff bead, then remove the lower sash. Take off the chains or cords that are on both sides. Finally, disconnect the sash weights from bottom of the cavity and take them off. Place the equipment in a secure place. Heat gun to soften the old, hardened filler or putty. Scrape it off using the blade of a putty. Reassemble the window. Reattach the hardware. Lubricate the pulleys with Teflon or silicone spray. Install the parting beads again and then reinstall the upper sash.
Repair
It is important for the homeowner to make a decision on whether to repair or replace their sash windows. Modern replacements are beneficial in many ways however, the original features in an older home can add character and value. They are also less expensive to repair than replacing. Keeping them in good condition will also help you save money on energy. Sash windows are susceptible to rattles, drafts, and condensation. These problems can result in increased costs for energy and damage to the frame and sash.
Sash windows can be a challenge 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, so it's best left to professionals. But, with the right tools and knowledge, it is possible to fix old sash windows yourself. Adam shows Jess how to get started:
Remove any security fittings that are in front of the lower window sash. Then, you can remove the staff bead. Then, remove the bottom sash. Remove the chains and cords from both sides, and tie them in such a way that they won't be pulled back by the weights. Now it's time to remove the upper sash. Unscrew the sash stoppers (a thin vertical strip of wood that is used to hold the sash) and then loosen any painted-covered hardware. The sash can be pulled back to reveal the weight balancing, that is a massive iron cylinder that is encased in a concealed cavity and secured by a rope. To stop the sash from falling into the void, you must pierce it using a nail, and then let the weight go.
When the sashes are untied clean the jamb and meet rails, remove the glazing bars and sash cords, and remove any paint from the sash stops using a utility knife. Once the sashes are back in place, reattach the stops using nails that are not too large to risk cutting the balancing weight.
To reassemble the sash put the top sash into its track first, and then the lower sash. Check that the sash stops and the frame are aligned correctly. If window repairs , reattach any beads used for parting. Reattach the sash cords or chains and install the sash pulleys.