vinyl window glass replacement


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Old 01-07-24, 09:13 AM
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vinyl window glass replacement

How do I replace a pane of glass in a double pane vinyl window?
 
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Old 01-07-24, 09:23 AM
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Usually you order a new sash from the manufacturer. The glass unit is not removeable from the frame.
 
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Old 01-07-24, 09:34 AM
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If you are asking how to remove 1 pane of glass from a double pane IGU, you don't. They are a sealed unit and you replace both of them.

Hard to say exactly how you do it on your window but basically there is a groove in the vinyl around the glass perimeter on either the inside or outside. (Varies by brand). That part is called a glazing stop. You have to pop it off (it snaps in place) in order to measure the width and height of the glass. You can usually use a business card to slip beside the glass, then lightly mark the edge of the glass with the tip of a sharp pencil and pull it back out. They also make a caliper can can be used to measure the glass thickness.

Once you know the exact glass measurements,. (Such as 23 13/16 x 28 7/16 x 3/4") you order the glass. Once the glass comes in and you verify that it's the right size, you remove the old glass. It is typically taped to the window frame with 2 faced tape, and you need a special deglazing tool to cut the tape. You also need to know what sized tape to use. Glaciers have multiple sizes of tape in stock, but if you are diy, you need to know what size you have and that's not easy for me to figure out and tell you. It's likely either 1/16" thick or 1/8" thick.

So you might need to remove ethe glass just to try to figure out how thick of tape you need. 1/2" wide x 1/16" thick is what I find to me most common nowadays. Example

To remove the glass, the deglazing tool is used from the opposite side that the glazing stops are on. You insert it between the glass and the frame and then move it 360 degrees around the glass until the glass is free. It usually takes a couple passes to ensure its entirely free. You typically need to be careful not to break the glass when you do this.

Then you clean off all the old glazing tape. It doesn't have to be sparkling clean, I usually just use a sharp 1/2" chisel to remove the old tape. A combination or pushing and pulling it like a scrape seems to work well.

Once its clean, you put the tape on. Bottom first, then sides, then top. You peel about 1" of facing back off the tape on each end, fold it out, bend it down where you can grab it later and put a piece of tape on it, just to hold it out of the way. You put a tiny dot of clear silicone on all 4 corners of the frame to seal any gap in the tape. Then you use a suction cup to lower the glass into the frame. It sets on 1/8" rubber setting blocks on bottom, and typically you can fit 1/8" setting blocks on the sides as well. It always needs at least 2 per side. You can then start removing the facing from the glazing tape, using those tabs you made to pull the facing off the tape. As you do, you push the glass firmly into the tape.

Then you tap the glazing stops back on. If they are too tight, the tape you used is too thick. If they are too loose, the tape you used was too thin. (This assumes your new glass is the same exact thickness as the old glass).

If the glass is low-e, (which almost all glass should be nowadays) you also need to install the glass the correct way, since reversing it makes the low e perform the opposite of the way it was intended to go. The sticker will usually tell you which side faces in or out.
 
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