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Hairline Cracks in Foundation (Slab) -- Problem?

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Hairline Cracks in Foundation (Slab) -- Problem? dalemccl 10-24-2006
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Posted by on October 25, 2006, 1:55 pm



Toller wrote:
> > Cracks = movement
> > Cracks in foundations are common in older houses and can be found in
> > new homes as well. some are problems some are not. However if the
> > drywall is cracked as you describe you have had major movement. Just
> > because you have had movement doesnt mean it will get worse some times
> > a structure will settle and then never move again other times it means
> > the begining of failure. Have it checked out to see what caused this or
> > is causing this. And please dont water the soil around your foundation
> > to try to make it expand....
> >
> My house is 24 years old. I bought it 14 years ago. There are cracks in
> the drywall in 2 places where the ceiling meets the wall, very thin, but
> also rather long. They were there when I bought the house (lightly spackled
> over...) and are not any worse now.
> Spackle doesn't last very long.
>
> Since they have not gotten any worse, it is fair to think that I don't have
> a serious problem with movement?

You may have had badly-done drywall taping as-built. Which can't be
remedied by "spackle". Such joints as you mention will open/close
seasonally with variations in moisture/temps affecting the frame. (Wood
"moves" too, perpendicular to what was the axis of the tree, with
moisture
gain/loss when wood's R.H. gets below about 20%.)(

I'd remove whatever stuff possible at those joints on top of the paper,
then
tape them properly. Good time to see if any drywall nails/screws
need to be sunk deeper. Of course, then you prime, paint.

Or you learn to ignore it for a bit.

J


Posted by on October 25, 2006, 2:34 pm


Hairline cracks are not a problem. Freshly poured slabs have hairline
cracks all the time. The crack in the drywall is not neccasarily from
the slab cracks. A bad repair without taping the joints can produce
this.


Toller wrote:
> > Cracks = movement
> > Cracks in foundations are common in older houses and can be found in
> > new homes as well. some are problems some are not. However if the
> > drywall is cracked as you describe you have had major movement. Just
> > because you have had movement doesnt mean it will get worse some times
> > a structure will settle and then never move again other times it means
> > the begining of failure. Have it checked out to see what caused this or
> > is causing this. And please dont water the soil around your foundation
> > to try to make it expand....
> >
> My house is 24 years old. I bought it 14 years ago. There are cracks in
> the drywall in 2 places where the ceiling meets the wall, very thin, but
> also rather long. They were there when I bought the house (lightly spackled
> over...) and are not any worse now.
> Spackle doesn't last very long.
>
> Since they have not gotten any worse, it is fair to think that I don't have
> a serious problem with movement?


Posted by Banty on October 25, 2006, 7:55 am


says...
>
>My ranch style house is built on a slab over clay soil in N.E.
>Indiana. There are close to a dozen vertical hairline cracks visible
>in the base of the foundation at various points around the house (i.e.
>from the ground extending up to where the siding covers the concrete.
>
>There are also hairline cracks in the drywall inside in several places
>and the linolium in the kitchen has a 3 or 4 foot line where it looks
>like the cement floor may be cracked underneath.
>
>Is this something to have checked out? Other than cracks there is no
>obvious problem this is causing right now. Is it likely to get
>worse?

Northeast Indiana on clay soil? You may have frost issues. What kind of
footers do you have?

Banty


Posted by on October 25, 2006, 10:53 am



>says...

I think the concrete footers are 3 or 4 feet in depth

>
>Northeast Indiana on clay soil? You may have frost issues. What kind of
>footers do you have?
>
>Banty


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