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 may also be poorly constructed to be insulated. With a little attention, they can be restored to their original performance.
First, cut off the seal with a utility knife. Then remove the staff bead, then take the upper sash out by removing cords or chains and storing hardware in a labeled bag.
Sealing
Sash windows can look stunning in older buildings, but they require regular maintenance and are susceptible to issues such as cracks in putty, wet rot, and drafts. It is possible to minimize energy loss and improve the efficiency of windows with sash by replacing them the windows, repairing or sealing them.
Draughts are mainly caused by gaps between the sash and the frame. They can also trigger noise reduction and rattle. Sealing beads, specialty products, and secondary glazing can all be used to minimize the air leakage inside the Sash.
A gap between the top or bottom of the sash and the jamb frame is a common problem. This can lead to moisture leaking in, rotting wood and the growth of mold. Seal the gap using silicone, polyurethane or foam sealant.
If a gap is preventing the windows from closing and opening without a hitch, it might be necessary to install new sash runners or spring bronze. These are strips of bronze that are stapled or nailed to the edges of the lower sash to stop sideways rattle, and they are available from DIY stores. Tubular weatherstripping also can be used, but it tends to rip and can detract the appearance of your window.
When installing replacement sash runners it is essential to measure the window opening. It is recommended to take measurements from the top of the sash up 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 the best fit and function of the window.
In older structures there is a greater gap between the sash and frame on the leading edge. It can be draught-proofed 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 height of the sash, and with an additional inch each side to allow to allow for movement. It should be squarely trimmed and positioned to match the angle of the sill. Use stainless steel screws since brass can get rusty. Also, use high-quality silicone or polyurethane glue.
Refurbishment
The windows with sash are a stunning historical feature in many homes. These windows are beautiful, but they can be prone to problems. Draughts, rattling or leaking are typical issues. And rotting frames and connecting rails, broken glazing bars, or damaged weights could add to the inconvenience. If these issues occur, it's time to consider repairs or replacements to your sash.
Refurbishment can be more expensive than replacing the sash however, it can restore the appearance and function to the same standard that it was in its original form. It involves lining the meeting rail and sash box using traditional putty and fixing any damage caused by rot. Re-painting the frame of the timber is also included, as is glazing 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). Finally, it's recommended to install brush pile weather strips to reduce the rattling and increase insulation.
If a replacement sash is needed It can be made using the same style to match the frame you have. This will help preserve the traditional style of your house. This is particularly important for buildings that are listed, as any modifications to windows need planning permission.
Before putting the new window in before installing it, make sure you check the metal tabs against those on the old sash (see below). If they're different sizes the new sash may not fit inside the slots of the window frame.
If a window is damaged, it is crucial to decide between repair or replacement because each type of work will involve a different level of expertise and expense. For instance the case of a sash windows that has a large chunk of glass missing, a replacement will be the best option. If the glass is only damaged in a tiny area or a sill is rotting, then a repair would be more appropriate.
Replacement
While a lot of homeowners are eager to keep their old windows in good condition, deterioration could eventually cause issues such as rattles, draughts or even broken glass. This is why replacing sash windows is often the only solution to these issues. There are other methods to improve sash window performance other than replacing them. These include the installation of secondary glazing and draught-proofing.
It is important to determine the extent of a issue, since it might not be feasible to replace a complete window. A foggy glass problem, for example, is usually caused by the sash, and can be resolved without tearing out the entire frame. A weak seal can often be corrected by a few easy fixes instead of a costly full frame tear-out and replacement.
Sash windows are surprisingly complex in design and feature lots of moving parts. This is why it can be difficult to solve common issues such as snapped sash cords or broken panes. Solving these issues usually requires dismantling the window frame, which isn't a job most homeowners want to tackle themselves. Many homeowners choose to engage a professional for these reasons.
A professional can help restore windows with sash to their original splendor or even bring them up to the latest energy standards. This may include reconditioning the frames and installing secondary glass to stop heat from getting out of the window. You can also install an edge strip for brush-piles to cut down on drafts and stop the window from squealing.
To begin a repair, take off the window stops. (The moldings that are in front of the lower glass). Then, loosen the staff bead and remove the lower sash. Take the chains and cords from both sides. Then, remove the sashweights from the bottom weight cavity. Store the equipment in a secure place. Soften any old filler, hardened putty, or filler with a heat gun and scrape it away with a putty knife. Reassemble the window, reconnect the hardware and then lubricate the pulley axles by using silicone or Teflon spray. Reinstall the parting bead, and install the upper sash.
Repair
The decision to repair or replace the sash window is an important one for homeowners. Modern replacements have many benefits, but the original features in an older home can add authenticity and value. They are also less expensive to repair instead of replacing. Inspecting window repairs can also reduce the energy cost. Sash windows can be susceptible to drafts and rattles. This could result in more expensive energy bills and can damage the frame and the sash.
Sash windows are notoriously difficult to open and close, and the traditional sliding mechanism can become dislodged from its track, or even draughty. Repairing a sash window involves extensive dismantling of the frame of the window and should be left to a professional. However, with the right tools and experience it is possible to fix old windows using sash. Adam shows Jess the basics:
Remove any security fittings behind the lower window sash. Then, remove the staff bead and remove the bottom sash. Remove the chains and cords from both sides, and knot them in a way that they can't be pulled back by the attached weights. It's now time to remove the upper sash. Unscrew the sash stops (a thin vertical strip of wood that is used to hold the sash) and remove any paint-encrusted hardware. Pull the sash back to reveal the weight. It is a large iron or lead cylinder that is hidden in a cavity and is supported by an elastic cord. To stop the sash falling into the void, make a hole in it using an hammer and then sacrifice the weight.
After the sashes are removed clean the jambs as well as rails that connect them. Remove the glazing bars and cords for the sash. Then, using a utility blade, remove any paint from the sash stop. After the sashes have been put back in place, reattach the stops using nails that are small enough to avoid cutting the balancing weight.
To reassemble the sash, place the top sash on its track first, then the lower sash. Verify that the sash stoppers and the frame are properly aligned. If needed, reconnect any beads that are parting. Reattach the sash chains or cords and install the sash pulleys.