Sash Windows Repair and Replacement
Sash windows older than 20 years can have a variety of problems such as rattles and draughts. They might also be inefficiently insulated. A little attention can often bring them back to their original performance.
First, remove the seal on the paint of the window stop using a utility knife. Then remove the staff bead and take the upper sash out by removing cords or chains and storing hardware in a labeled bag.
Sealing
Sash windows are gorgeous in older structures, but they require care. They can be affected by issues such as wet-rot, cracked putty and draughts. Repair, sealing, or replacement of the sash window is an effective method to minimize these issues and increase energy efficiency.
The gaps between sash frame are the primary source of draughts. They can also lead to noise reduction and rattle. Sealing beads, specialty products and secondary glazing can be used to limit the air leakage inside a sash.
A common problem is a gap that exists between the top of the sash and the jamb frame or the bottom of the sash and the sill. This could cause moisture to leak in, rotting wood, and mold growth. The gap can be sealed with silicone or polyurethane caulking or foam sealant.
Installing a new sash runner, or spring bronze could be necessary if a gap prevents the windows from closing and opening effortlessly. These are bronze strips that are stapled or nailed onto the edges of the lower sash to stop sideways rattle, and they can be purchased at DIY stores. Tubular vinyl weather-stripping is an alternative option, but it can tear, and can detract from the appearance of windows.
When installing replacement sash runners, it is important to take full measurements of the window opening. It is recommended to measure 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 be transferred to the new runners, which will help ensure a good fitting and better operation of the window.
In older structures the gap between the frames and sash is typically larger around the leading edge. It can be draught proofed by a self-adhesive V-strip, but it is important to consider this when cutting and measuring the material.
A strip must be cut to the width of the sash, and with an additional inch to allow movement. It should be squarely trimmed and placed to align with the angle of the sill. Use stainless steel screws since brass can rust. Also, make sure to use a high quality polyurethane or silicone glue.
Refurbishment
The sash is a beautiful historical feature of a lot of homes. They are beautiful however they are prone to problems. Common issues include rattling stickiness or draughts. And rotting frames and connecting rails, broken glazing bars or weights that are not working properly can create a mess. When these problems occur it's time for a sash repair or replacement.
Refurbishment is more costly than replacing the sash but can bring back the appearance and functionality to the same level in its original condition. It involves lining the meeting rail and sash box using traditional putty, and then repairing any rot damage. 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). It's also recommended to install brush pile weather strip to prevent rattling.
If the need for a new sash arises, it can be made using similar designs to the old frame and maintain the character of your house. 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 those of the old sash before installing it (see below). If they're different shapes, the new sash will not fit inside the window frame slots.
It is important to decide if you want to replace or repair windows that are damaged, as each will require a different degree and amount of knowledge. If a large part of the glass in a sash is missing, then replacing it will be a better alternative. However, if the glass has been damaged in a tiny section or a sill has been rotting then a repair will be the better option.
Replacement
While a lot of homeowners are eager to keep their old sash windows in good working condition, deterioration could eventually cause issues such as draughts, rattles, or even broken glass. These issues usually lead to a replacement as the only sensible solution. There are other methods to improve the performance of sash windows other than replacing them. They can be improved by the installation of secondary glazing and draught-proofing.
Consider the extent of the problem. It may not be necessary or even suitable to replace windows. For instance, a fogging glass issue is usually a problem within the sash itself and can usually be solved without tearing out the entire frame. It is often possible to fix a weak seal using a couple of simple fixes, rather than ripping out the entire frame and replacing it.
Sash windows have a complex design that has many moving parts. It can be a challenge to fix common problems such as broken panes, or snapped sash cables. The majority of homeowners don't want remove the window frame in order to fix these problems. For these reasons, many homeowners choose to work with a specialist.
A specialist can help restore windows made of sash to their original splendor or even bring them up to current energy standards. This could include reconditioning the frames and fitting secondary glazing to stop heat from the window. It is also possible to add a brush-pile strip in order to minimize drafts and stop the window from rattling.
To begin the repair, remove the window stops. (The moldings that are located in front of the lower glass). Next, loosen the staff bead, then take off the lower sash. Remove the chains and cords from both sides. Lastly, remove the sashweights from the bottom weight cavity. Keep the hardware in a secure location. Use a heat gun to soften old, hardened filler or putty. Scrape it away with a blade made of putty. Reassemble the window, reconnect the hardware and lubricate the pulley axles with silicone or Teflon spray. Install the parting beads and then reinstall the upper sash.
Repair
It is important for homeowners to make a decision on whether to repair or replace their sash windows. Modern replacements are beneficial in many ways, but the original features in an older home can provide authenticity and value. They are also less expensive to repair instead of replacing. Keeping them in good condition can also save energy costs. 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 draughty. It is best to leave the repair of a sash windows to professionals, as they require extensive removal. With the right tools and skills it's possible for you to repair the old sash window yourself. Adam shows Jess the basics:
Remove any security fittings behind the lower window sash. Next, take off the staff bead and take the sash off the bottom. Take the chains and cords from both sides, and tie them in a way that they can't be pulled back by the attached weights. It's time to remove the upper sash. The sash stops must be removed which is a thin vertical strip of wood that holds the sash. Also, take off any paint-encrusted hardware. The sash should be pulled back to reveal the weight. It is a massive iron or lead cylinder that is hidden inside a cavity and secured by cords. To prevent the sash falling into the void, you must pierce it using a nail, and then sacrifice the weight.
After double glazing repairs Watford are removed, clean the jambs and meet rails. Remove the glazing bars as well as the cords for the sash. Then using a utility knife, remove any paint from the sash stop. When the sashes are returned to their original positions, you can attach the stops using nails that are not too large to risk damaging the balancing weight.
Reassemble the sash by placing the upper sash first into its track, then the lower sash. Make sure that the sash stops and the frame are properly aligned. If needed, reconnect any beads that are parting. Reattach the sash chains or cords and attach the sash pulleys.