Removing Old Glazing Putty - Painting & Finish Work - Contractor Talk

Removing Old Glazing Putty

 
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Old 12-14-2015, 04:32 PM   #1
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Removing Old Glazing Putty


Any magical suggestions about removing old glazing putty? It's sound and hard - no cracks or loose parts - but it's separated just enough from the glass to let water and air in. Not enough of a crack to fill with glazing or caulk.

Special multi-tool blade? Heat gun is barely faster than chisel or scraper alone.

I'm thinking about using the router and track - if I cut a rabbet big enough to get 90% of it the rest (at least the part against the glass) will come out easily.

Trim router and flush bearing bit for the parts up on the ladder.

I've sold them new windows for the rest of the house - these windows are pretty and will be refurbished.

I'll appreciate any advice.
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Old 12-14-2015, 04:36 PM   #2
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Re: Removing Old Glazing Putty


Heat

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Old 12-14-2015, 04:36 PM   #3
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Re: Removing Old Glazing Putty


How old is the stuff?

Just had some tested and it came back hot.
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Old 12-14-2015, 04:48 PM   #4
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Re: Removing Old Glazing Putty


steam - yawn....
(I can hear the jaws drop from clear over here)

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Old 12-14-2015, 05:10 PM   #5
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Re: Removing Old Glazing Putty


Esiest is sub it...

Assume it's lead putty, unless you have data differently...
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Old 12-14-2015, 05:10 PM   #6
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Re: Removing Old Glazing Putty


Ya just take those windows to your nearest steam room and invite some friends.
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Old 12-14-2015, 05:21 PM   #7
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Re: Removing Old Glazing Putty


Everything I've tried has been covered....
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Old 12-14-2015, 07:04 PM   #8
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Re: Removing Old Glazing Putty


Quote:
Originally Posted by griz View Post
How old is the stuff?

Just had some tested and it came back hot.
If you mean lead or asbestos, I can deal with that - this house is old, with asbestos siding over the original lap on the back of the house, layer after layer of lead paint, a child inside, and a couple of inquisitive neighbors outside. We've had plastic enclosures, wipedowns, double-bagged waste, the full treatment.

If by "hot" you mean radioactive.... yikes, really?
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Old 12-14-2015, 07:06 PM   #9
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Re: Removing Old Glazing Putty


I wish I had some magic for you Bob on this but no such luck.

I have referbed many an old window with hardened putty around here in the Old Town district of Orange, CA. and many was the time I wished I had had a good way other than careful scraping. All the methods seem to have terrific draw-backs to them.

Andy.
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Old 12-14-2015, 07:20 PM   #10
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Re: Removing Old Glazing Putty


Worked in a hardware store when I was a teen,did all their window repairs using a glazing iron.
It had two heat coils,similar to the ones in old toasters,at a 90* angle for getting working the corners.Moved along pretty quickly.
Just had to get the timing down so you didn't singe the wood.

Very similar to the upper one in the pic at the top of this link;
http://www.myoldhouseonline.com/foru...02Comment21398

Good luck finding one though,probably not made anymore.
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Old 12-14-2015, 07:33 PM   #11
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Re: Removing Old Glazing Putty


Quote:
Originally Posted by CarpenterSFO View Post
If you mean lead or asbestos, I can deal with that - this house is old, with asbestos siding over the original lap on the back of the house, layer after layer of lead paint, a child inside, and a couple of inquisitive neighbors outside. We've had plastic enclosures, wipedowns, double-bagged waste, the full treatment.

If by "hot" you mean radioactive.... yikes, really?
Asbestos.
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Old 12-14-2015, 08:40 PM   #12
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Re: Removing Old Glazing Putty


Steam.

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Old 12-14-2015, 08:48 PM   #13
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Re: Removing Old Glazing Putty


http://www.praziusa.com/putty-chaser/

Just hold your breath if it's hot
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Old 12-14-2015, 09:08 PM   #14
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Re: Removing Old Glazing Putty


If you end up using a heat gun, shield the glass with something to block the heat.

Ask me how I know.
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Old 12-14-2015, 10:02 PM   #15
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Re: Removing Old Glazing Putty


Laborious chipping out of the old glazing is sometimes the only way to go.
I've tried a heat gun on 30 year old aluminum window glazing on school building windows, and believe me, it's like trying to soften up granite.
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Old 12-14-2015, 11:33 PM   #16
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Re: Removing Old Glazing Putty


Quote:
Originally Posted by Caslon View Post
Laborious chipping out of the old glazing is sometimes the only way to go.
I've tried a heat gun on 30 year old aluminum window glazing on school building windows, and believe me, it's like trying to soften up granite.
Heat gun, steam gun, and speedheater IR aren't having much effect, at least in the time I'm willing to spend. I don't want to reduce these windows to raw beginnings, and some of them are fixed, i.e. I can't get them out and to the shop.

So here's what I did:

Mask up, put a flush bit in the router, clamp track or board, and fire away.

Working so far.

and cut away.
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Old 12-14-2015, 11:39 PM   #17
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Re: Removing Old Glazing Putty


Quote:
Originally Posted by CarpenterSFO View Post
Heat gun, steam gun, and speedheater IR aren't having much effect, at least in the time I'm willing to spend. I don't want to reduce these windows to raw beginnings, and some of them are fixed, i.e. I can't get them out and to the shop.

So here's what I did:

Mask up, put a flush bit in the router, clamp track or board, and fire away.

Working so far.

and cut away.
Hope you are wearing a GOOD respirator and have any other orifices
covered up...
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Old 12-15-2015, 12:00 AM   #18
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Re: Removing Old Glazing Putty


I usually take a small chisel to get started. Then the best tool I've found is a regular glazing knife. They just work. Followed up by a chisel if needed.

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