hairline cracks drywall

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greg1
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hairline cracks drywall

Post by greg1 » Wed Apr 18, 2018 11:29 pm

Hi guys,

I have these cracks on my walls that Im trying to fix. they are pretty much throughout the whole house, on the ceiling and in some places on the walls, every room has at least one crack like shown in the pictures. Im pretty sure its not a structural issue, probably just from the house being old, its about 60 yo bungalow. Im just wondering what would be the best way to go about fixing them? Can I prime the area and tape and mud over top? Should I scrape some of it off first? Probably need to do asbestos testing if i will scrape it... Im really hoping you might help me find the best solution for this problem.

Thanks!
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Shannon
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Re: hairline cracks drywall

Post by Shannon » Thu Apr 19, 2018 7:20 am

Is this a lath and plaster house or drywall ?
Looks like a bad drywall seam? If so then clean off the lose stuff and apply drywall tape over it and then coat with mud like a normal butt joint. Simply filling the bare joint with mud will only crack again .
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greg1
Posts: 110
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Location: Calgary, Canada

Re: hairline cracks drywall

Post by greg1 » Thu Apr 19, 2018 9:25 am

Its a drywall house. Yes in some places it looks like the cracks running where the seams are suppose to be... other places they appear to be seldom placed. Also I believe there is a double layer of drywall installed. One is 1/2" and another is 3/8".

Should I be worried about asbestos if I want to scrape some of the old stuff prior to taping?

Clarence
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Re: hairline cracks drywall

Post by Clarence » Thu Apr 19, 2018 2:03 pm

You could have a moisture problem. look at the Coefficient of Thermal Expansion.
Hygrometric Expansion " an increase in relative humidity from 10% to 50% a gypsum board wall 300 Ft. long will expand .78 inch or 25/32

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Shannon
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Re: hairline cracks drywall

Post by Shannon » Thu Apr 19, 2018 8:10 pm

greg1 wrote:
Thu Apr 19, 2018 9:25 am
Its a drywall house. Yes in some places it looks like the cracks running where the seams are suppose to be... other places they appear to be seldom placed. Also I believe there is a double layer of drywall installed. One is 1/2" and another is 3/8".

Should I be worried about asbestos if I want to scrape some of the old stuff prior to taping?
Any home pre 1990s is likely to have asbestos in the drywall materials. In my honest opinion for what you will have to do I would just take precautions like wearing a mask and preferably a filter half mask with P100 filters. Turn off your Hvac to be sure its not sucking everything up a spreading it through the entire home. If you are not comfortable with that you can send a sample for testing first so you know what you are up against.
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greg1
Posts: 110
Joined: Wed Sep 27, 2017 9:44 am
Location: Calgary, Canada

Re: hairline cracks drywall

Post by greg1 » Fri Apr 20, 2018 8:46 am

thanks very much for tips and suggestions!

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