10 Easy Steps To Start Your Own Replace Window Pane Business

8 min read

How to Replace Window Panes

A damaged or cracked window can be a nuisance. It could be a chance to upgrade to energy-efficient windows or insulated ones and enjoy advantages like improved comfort, increased resale value and lower utility costs.

It’s a task you can take on yourself for less than the cost of replacement windows uk of hiring an expert. You’ll only require the proper tools and a few minutes of your time.


Replace your single-paned windows with tempered or insulation glass to improve energy efficiency, cut down on noise, and protect the historical integrity of your old home. A majority of homeowners with hand tools can Replace upvc window Handle a window pane. You will also need an extra window pane, glazier’s tips pliers, and latex glaze putty. If necessary you may make use of a heat gun to warm the old putty. Before starting, put on gloves and safety glasses as working with broken glass may cause injuries.

Remove any broken glass pieces remaining. This can be done with the help of pliers though using flathead screwdrivers can be used in the pinch. Utilize a wood chisel or putty knives to remove any old putty that remains around the frame and the window sash. Be careful and slow making sure not to break the current window sash. This can be done best on a ladder, not on the ground. Also, ensure that someone lower to hold it steady.

Once you have removed all the old putty, you can prepare the window frame for the new pane. Find the width and the height of the opening for the sash and subtract 1/8 inch from each measurement (to allow for seasonal expansion and contraction). Bring these measurements to an hardware store or home center, and get a piece of stock glass cut to size. You can also cut the glass yourself if you have the appropriate tools.

After putting in the new pane after installing the new pane, put a tiny amount of caulking along the edge to ensure it is weatherproof. Then, place a glazier’s tip on the frame’s opposite side to secure the pane in the right place. The points should not be so tight that they cause friction between the sash and the frame however they should not be too loose.

Before applying the putty, make sure to knead it until it is soft and free of lumps. Then you can roll it into pencil-sized strips. Apply the first strip to the frame’s corner. Work from corner to corner, making sure it is even and smooth.

Glazier’s Points

The glazier’s points are small triangular pieces of metal that allow glass to be secured to the frame without causing any damage to the fragile surface. Knowing how to use these hidden little helpers is easy and could save you money on a professional installation or the cost of purchasing new glass.

After getting rid of the old putty glazier points and any leftovers Clean the frame thoroughly using a utility knife. If needed, lightly sand the wood along the rabbet grooves to smooth rough spots. If you decide to sand wood, cover it with painter’s tape to avoid accidental damage.

Write down the exact dimensions of the frame. Bring these measurements to a hardware store or home center and request that the new pane cut slightly smaller than the frame’s opening. This will ensure a secure fit and will allow room for expansion and contraction.

Insert the new pane into the frame and press it down using your hands. Make use of the chisel’s point or the back of the putty blade to smudge the glaziers’ points as illustrated in Figure 11. When you’re done taping, they should be level with the top edge of the pane. the raised shoulders of the points should be just below the rabbet’s lip. groove.

Apply a small amount of glazing compound over the edges of the new glass and in the rabbet grooves to seal and protect them. Let it dry and cure fully.

Install the new window sash when the glazing compound has dried. First, coat the wood with an even layer of linseed. This will prevent the new putty from soaking in the moisture and deteriorating and cracking with time. Apply the coating using a brush this coat, or the point of the putty blade. Then, use the chisel on the back of the putty tool or the back of the handle to gently hit the new sash, or glazier’s point into rabbet grooves. Repeat this procedure every 10 inches along the frame’s perimeter.


A hurled baseball, an errant rock or a falling branch can cause a window pane to crack or break. The majority of windows can be replaced easily by installing a new piece. The glass is held in place using tiny metal clips known as the glazier’s pointed and putty, often called glazing compound. Before you install a new pane, first take out the old one and clean the area using the help of a rag, an abrasive scraper that is a pull type or the wood chisel. Wear safety glasses and gloves while working. You’ll require a heat gun if the window is glued into the frame.

If you’re planning to install your original sash, remove the molding that holds the old pane. Then sand the sash to ensure it’s level and ready for a new caulk. After the sash has been re-installed and sanded, apply a fresh silicone caulk around the glass to ensure it won’t leak or discolor as time passes.

Remove the glazing points from the rabbets, the grooves in the sash, where the glass sits. If they’re hard to cut, place an instrument like a heat gun over them for a few minutes to soften them. If you’re using a heated gun, make sure not to cause damage to the railings of the sash or the sash itself by holding the tool too close.

Create the bed for your new pane after removing the old glaze points and putty. Roll a rope of glazing compound between your hands, forming it to be about 1/2-inch thick. Then, you can press it into the rabbets in which the glass will be. It’s important that the glass sits on the putty in all places on both sides So if you have to, lightly tap the glass into the rabbet with your thumb.

If the new pane is cracked, you can use a silicone caulk or a glass glue made from solvents to cover the crack prior to pressing it in the sash. In other cases, you’ll need to putty over the crack to form an impervious seal to keep water out. Once the putty is dry clean the oily film from the glass and allow it to dry completely before painting. If you paint before the putty is completely dry, it won’t create an effective seal and could discolor or leak in time.


If you’ve suffered a break in a window pane, you may be concerned about the expense of a new one. It’s true that replacing a single pane glass doesn’t need to be costly even if you do it your own. In fact, even a double-pane window can be replaced for a fraction of the cost of an expert.

If you’re working with a large glass window, first make sure it is securely fixed to the frame. This job can be made relatively simple and fast with the proper tools and techniques.

When you are ready to start with the removal of the window pane. Pry out the glazing points made of metal that are attached to it. These are tiny metal triangles which act as “nails”, holding the window in the frame. They are buried beneath a glaze putty or bead that hardens to an unbreakable wedge that holds the frame firmly in position and conceals the edges.

After you have removed the old pane taken away Clean up the frame and wood. Scrape off any paint that has been used, and sand the rabbet grooves where the glazing points were. Sand them down to bare wooden surfaces, allowing you to paint the frames with the same shade. After sanding the wood you can apply a layer flax oil. This will help prolong the life of the frame.

Then, you need to measure the size of the window opening. It is necessary to take vertical and horizontal measurements of the entire opening, and also the thickness of the old pane. Subtract 1/8 inch from each measurement to ensure you have the exact size for the new pane. This will also allow for expansion and replace upvc window handle contraction of the glass in times of seasonal changes. Take these dimensions to your local hardware or home improvement store and have a piece cut for you.

Now, it’s time to bed the new window pane. To do this, place the pane inside the frame and move it around until a 1/16 inch of putty remains between the edge of the glass and the sash on all four sides. Use a putty knife to smear the putty evenly, making sure that there isn’t an excessive amount of excess putty in the corners and along the edges. When the putty dries, it can be painted with the same color as the frame to prevent water and air from leaking into the frame and causing fogging.

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