How To Replace A Pane On A Barn Sash Window

can I replace a pane on a barnsash window

Replacing a window pane on a barn sash window is a manageable DIY project that can save you money and fix drafty rooms. It is possible to replace a pane on a barn sash window, and it may be cheaper than replacing the whole window. The process involves removing the trim, prying out the old glazing points, and installing a new pane. Depending on the age of the window, you may be able to order a replacement sash from the manufacturer, or you can take the sash to a glass place to get a new insulated panel made.

Characteristics and Values Table for Barn Sash Window Pane Replacement

Characteristics Values
Difficulty Replacing a window pane is a manageable DIY project that can be done with relative ease, especially if the sashes and frames are in good shape.
Cost Glass is relatively cheap compared to a new window. Quotes for replacing an upper sash range from $325 to $425.
Tools/Materials Hammer, gloves, putty/sealing caulk, metal flashing, and glazing points.
Process Loosen shards with a hammer, remove remaining pieces with gloved hands, pry out old glazing points, scrape off excess putty, and install new pane.
Considerations Age of the window, type of glazing, and whether it is a single or double-pane window.

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Removing the trim and glazing

Removing the Trim:

  • Use a utility knife, a hammer, and a pry bar: Place the knife along the seam between the moulding and the wall. Apply pressure to create a score line through the dry paint and into the drywall. Do this on all four sides.
  • Insert the pry bar: Gently tap the pry bar with a hammer to loosen the trim. Start with the trim on one side and then repeat for the opposite side, and finally, do the upper and lower trims.
  • Mark the reveal lines: Before installing new trim, use a tape measure and a sharp pencil to mark the jamb, creating reference marks for positioning the new trim pieces.
  • Cut the new trim pieces: Using a miter saw, cut the trim pieces at a 45-degree angle. Make sure the pieces are longer than the width or height of the window, depending on which side you're working on.
  • Adjust the length: Test the fit of the trim piece and adjust the miter angle if needed. Make incremental cuts to gradually achieve the perfect length.
  • Attach the trim: Place the trim piece along the reveal line and attach it to the jamb using brad nails and wood glue. Wipe away any excess glue.

Removing Glazing:

  • Identify the glazing type: Determine if the window is internally or externally glazed. Most modern windows are internally glazed, but some older or lower-end windows may be externally glazed.
  • Remove beading or strips: If your window has beading, use a thin, stiff piece of metal (like a modified wallpaper stripping knife) to pry it up. If there are strips, use small pliers to pull them out. Make sure to note the position of each piece to facilitate reinstallation.
  • Lift out the glass: Once the beading or strips are removed, carefully lift out the glass panel. Take note of any packers or spacers that need to be retained for reinstallation.
  • Clean the frame: Before installing a new glass pane, ensure the frame is clean and free of any residue or old putty.

Remember to wear protective gear, including gloves and eye protection, during the removal process. Always handle glass with care to avoid injury.

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Replacing the glass

Next, you will need to remove the old metal glazing points from the rabbets, the grooves in the sash where the glass sits. Pry them out carefully. If you are removing the sash, check if there is a manufacturing label inside the headrail, on the bottom or side of the sash, or in the channel on the side of the frame where the sashes slide. Depending on the age of the window, you may be able to order a replacement sash from the manufacturer inexpensively, and it may even be covered under warranty.

Alternatively, you can take the sash to a glass place, and they will have a new insulated panel made for you. If you plan on heating the building, you might want to look into more energy-efficient windows. For single-pane, wood-framed windows, you should be able to replace the pane and reglaze them with relative ease. Set the glass in a thin bed of putty or use sealing caulk if you never plan on replacing the panes again.

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Ordering a replacement sash

If you're looking to order a replacement sash, there are a few options available to you. Firstly, check the age of your window, as you may be able to order a replacement sash directly from the manufacturer, which could be inexpensive or even covered under warranty. You can find the manufacturing label inside the headrail on a double-hung window or on the bottom or side of the sash itself. Alternatively, you can take the sash to a glass place, where they can create a new insulated panel for you.

If you're handy and want to save some money, you can opt for a window sash replacement kit, which is a cheaper alternative to complete window replacement. These kits typically include a top or bottom sash, or both, along with the necessary components for installation. The process usually takes about two hours and allows you to keep the key architectural elements of your window, such as the trim, casing, and window frame.

When ordering a replacement sash, it's important to get the measurements right. Measure the height and width of the window opening at three places on the side and top, and always use the smallest of these measurements when ordering. This is especially important for older wood windows, as they may have a balancing weight mechanism that makes sash removal tricky. Newer vinyl or fiberglass windows are easier to work with due to their spring balance design.

Another option is to purchase a new-construction window from your local home centre and use its sash as a replacement. You can keep the other parts for future use. However, this option may require you to remove extraneous items like screens, storm windows, and shutters.

Regardless of the option you choose, replacing just the sash can be a cost-effective way to fix a broken or damaged window without needing to install a completely new window.

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Removing shards and putty

To remove shards, use a hammer to gently tap the centre of the covered pane and loosen the shards. With gloved hands, carefully wiggle and pull out any remaining pieces. Collect all the glass shards and dispose of them safely. If the glass is in large pieces and you want to save it, use a razor blade or sharp knife to cut along the edge of the putty and separate the glass from the frame.

Removing putty can be challenging, especially if it is in good condition. Use a putty knife to pry away large chunks of putty. For putty that is difficult to remove, soften it with a heat gun, linseed oil, or by warming it in the microwave on the defrost setting. Keep the heat moving to avoid concentrating it in one area. Scrape off the softened putty with the putty knife. You can also use a pocket knife at the right angle and tap it with a light hammer to remove the putty.

After removing the putty, pull out any remaining glass retaining nails or metal glazing points with pliers. Ensure you remove all the old putty and nails before proceeding to the next step of installing a new pane.

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DIY vs professional replacement

Whether you hire a professional or replace your window pane yourself depends on a few factors, including the type of window, the complexity of the job, and your comfort level with the tools and process.

DIY Replacement

DIY window pane replacement can be a cost-effective way to fix broken or damaged windows, especially for single-pane windows in older homes. Single-pane windows are the most basic and affordable type, and replacement is usually straightforward. You can expect to spend between $75 and $600 on materials like the glass pane, putty, and any necessary tools. The process involves removing the sash, taking it to a glass specialist to get a new insulated panel made, and then replacing the sash. Online guides and video tutorials can help you through the process, but safety should be a top priority when working with glass. Always wear safety glasses to protect your eyes from shards and debris.

Professional Replacement

Professional replacement is recommended for double- or triple-pane windows due to their complex construction and the need to ensure a proper airtight seal. The cost of professional replacement depends on the size and complexity of the job, with single-pane window pane replacement ranging from $175 to $900 per window and double-pane replacement typically costing between $250 and $1,200. Professionals have the tools and expertise to handle complex replacements safely and efficiently, and they can also advise on special features like UV-blocking coatings or safety glass. While more expensive than DIY, professional replacement can save you money in the long run by preventing issues like water damage and pest intrusion that can result from a broken window.

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