Sash Windows Repair
Pam is determined to save as much of the original window as possible. She employs a heat gun set on medium with an nozzle guard to soften the old, hardened glazing compound (putty) and then a putty knife to scrape it off.
She then knots bottom sash cords in a way that they don't pull into the pockets for weights, then removes the metal hardware. She then stores it in a bag with a label.
Repairing the Sash
Even when they are maintained properly and repaired, older wooden windows might not be able to open and close as easily. This problem could stem from the hardware being misaligned, which is relatively easy to fix. Alternatively, it could be a result of the wood shrinking and swelling due to changes in humidity levels in the air. The replacement of the wood window sash could help your window function more efficiently and effortlessly.
To remove the lower sash, first find the wooden peg(s) that hold the rail and stile together. To ensure that the sash is not damaged using a mallet with a soft face or hammer to gently remove the stile from the rail. Then, you can remove the muntins, which are the vertical and horizontal pieces of wood that separate the glass panes. After the muntins are removed, lift the sash and place it on a workbench or table. Take the sash cords off. Cut them to the point at which they are tacked.
After the window has been completely cleaned, it's time to start reassembling it. The author covers each sash that is reassembled with glazing compound - using a small pry bar and a stiff-bladed knife. She then secures them using the glazier's point (one point on each side of the sash). She also adds a sash stopper to prevent it from being completely pulled down.
Reusing the sashcords is an excellent idea. Attach the back end of the cord to the bead with a nail or pin that extends from the top of the bead. This will hold the weight in place until you can tie the opposite end to the sash. After the cord is secured, temporarily nail or pin the weight to the staff bead, and leave the head protruding to stop the weight from sliding off in the process.
After the sash has been put back together, it can be hung in its frame. Then, the track made of vinyl can be put back in place and, finally, the lock terminals can be replaced by releasing each pawl from its locking terminal and then twisting them counterclockwise to reset their tension.
Restoring the Frame
The elements can have a big impact on the exterior and interior of your sash windows, and it is often the situation that the frame will be more damaged than the sash. This is due to the fact that the frame is exposed to the weather especially in older houses where the sills were built in the past and don't slope like modern ones. This can lead to water residue collecting on the sill that, over time can cause the wood to turn rotten. If the rot is not treated, it can extend to other areas of the frame and weaken the structural integrity.
A specialist window restoration service can fix your sash windows and improve their energy efficiency. They can also install brush pile strips that minimize drafts and stop the window from rattling.
Restoring your sash window can be a cheaper alternative to replacing them and can also bring an air of historical significance to your home. A company with a high-end reputation will be able restore your sash window and keep them in top condition for years to come.
Before attempting to repair a sash window, it's important to ensure that the hardware is working properly and there are no leaks. If the sash isn't anymore opens and closes it may require replacement.
After removing the sash the old glazing putty needs to be removed and frames cleaned to reveal bare wood if necessary. The damaged areas can then be repaired using a top quality wood filler like Expoxy High Build, and sanded to remove any bumps or unevenness. After sanding the area, it is then able to be primed and finally painted to protect against moisture and elements.
The muntins, the horizontal and vertical pieces of wooden that separate each pane from the glass in the old sash window frames can also break loose or fall off. This is typically caused by rotten wood or soft wood. It can be prevented by regular inspections and maintenance. Regular application of wood preservatives like varnish or linseed will help protect the timbers and help you identify potential issues before they become serious.
Restoring the Glass
When a window is old it begins to show signs of wear and tear. The paint may start to chip, the wood could start to decay, or the glass can break. When this happens it is time for a sash windows repair.
The sash is an element of the window that contains both the glazing bars and actual glass. The sash is moved up and down in order to open and shut the window. This movement is supported by an array of weights and cords.
Wooden sash windows need regular maintenance to ensure they are working properly. If left untreated the sash can start to develop mold, mildew or even rot. The sash of wood can expand and contract as a result of changes in humidity after being exposed to the elements. This can cause windows to become stuck or clogged within its frame.
Cleaning the glazing bars and glass and taking away any dirt or dust collected on them is the initial step in restoring the sash. It is also a good chance to replace the worn weather strip. If there isn't a weather strip it can be affixed to the bottom of the sash and the silicone or Teflon spray can be used to provide lubrication to the pulley axles.
It is a good practice to inspect the wood for damage after the sash was cleaned and reflared. A test with a screwdriver can be conducted to determine whether the wood is soft or decayed, and in that the case it should be replaced. New timber is then inserted into glass window repair the areas that are rotten and primed and painted.
Another good opportunity to improve the acoustic qualities of the window is to have it made draught-proofed. To reduce the amount air that is able to pass between the glass panes gas-filled vapors are injected into the gaps. This can improve the thermal efficiency and also reduce noise from outside. Draught-proofing also helps to reduce heating and cooling costs. This is especially important in Minnesota where energy bills are quite high. Restoring and draughtproofing your window sash can make a big improvement to the comfort of your home.
Restoring the Muntins
Even damaged muntins are repairable with the right techniques. First, tape strips of painter’s tape to the glass. Then, apply a layer of slow-setting epoxy on the damaged muntin. Once the epoxy is dry, use a scraper to shape it into a smooth profile. Then using a rag soaked in white vinegar, clean the window and smooth before applying a second coat of epoxy.
After fixing the frame and sash, as well as the glazing bars, you're now ready to paint the window. You can either purchase new restoration glass through a dealer, or salvage old panes glass from an auction house. If you are looking for glass at an estate sale try to find glass that is either the right size or 4" larger than your existing panes. This will make it easier to trim the glass.
The upper and lower sashes are held together by two sets of rails which are horizontal strips that hold them in place. Stiles are the vertical pieces that join the two. Sash windows also have an intricate arrangement of timber components: sash horns with a profile and sash guts that surround glazing mouldings, scotia mouldings, precisely-crafted parting beads and staff beads. All of these components must work together seamlessly, requiring millimetre-specific gap sizes and a hidden system of pulleys and weights.
When windows from the past are reglazed with insulated glass units the original rails and stiles often get removed to accommodate the deeper thickness of the new glazing. This can not only decrease the transparency of the individual light bulbs, but can also affect the structural strength and cause damage over time.
Many homeowners decide to remove the sash and reframe their window. Although this will require an investment of some amount but it's typically cheaper than replacing the entire window. It will also preserve your home's historic features. Additionally, it won't reduce the energy efficiency of your home. So whether you're in need of a quick solution or are looking for an investment that will last for a long time the restoration of sash windows is a good option to consider.