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Old 10-05-2008, 05:32 PM   #1
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Attachhing wall vent covers


House was built in 1945. It seems that the walls are some type of 1/2" board that is very hard or at least the plaster coats are.

I replaced a 5x10 supply duct cover. The plaster that the previous screws were attached to has crumbled. I now have no way to attach the cover.

"Normal" drywall compound will not be strong enough to hold the cover.

Any suggestions/tips on what to do?

*MODs: I put this in HVAC since I thought this might be a problem some HVAC people have. Feel free to move it if necessary.

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Old 10-05-2008, 05:51 PM   #2
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Attachhing wall vent covers


If you had some pictures I might be able to offer some suggestions.

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Old 10-11-2008, 10:41 PM   #3
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Attachhing wall vent covers


Here is a picture
Attachhing wall vent covers-vent.jpg

The other issue I have is that the wall is not flat around the vent. The wall is kinda wavy.

So the new vent has a gap on one side compared to the other.

Somehow, I should figure out how to build out the wall.

The previous owner user caulking and then painted the vent.
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Old 10-11-2008, 11:16 PM   #4
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Attachhing wall vent covers


The screw is suppose to go into the sheet metal.

If teeh hole is stripped out too much for the #6 screw to hold, use a #8 screw.
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Old 10-11-2008, 11:18 PM   #5
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Attachhing wall vent covers


You can take some wood large enough to get through the wall and either glue it or screw it to the back of the wall leaving room for the vent to....well vent. Keep the wood close to the edges of the opening so that your screw for the vent will have something to grab on to.

You will have to use screws long enough to get through the wall and grab most of the wood you put back there.

Unless I am missing something this will work.
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