Slab foundation..House built 2008 Southern Calif.

[Jeffrey R. Pope]

Originally Posted by rray

That's a fairly good-sized crack for a 2008 home in Southern California.

I would agree if this were a PT slab. If not, I wouldn't be concerned with what he has shown. . .

[Jeffrey R. Jonas]

Jeff,
I know you cover an area quite different from Russell. What has been your experiences with Radon, if any? (Not looking for a pissin match, just education. I lived in SoCal from '79-'8. Thx.
Jeff

[Russel Ray]

Originally Posted by jjonas

You obviously have an issue with the US EPA map, so here's one for LA County, from the State of CA.

http://www.consrv.ca.gov/CGS/mineral...n/SR182Map.pdf

(Magnify to >50% for proper shading of colored areas)

Not at all. The Us EPA map compares counties, and when comparing counties, San Diego County is the lowest, which also means that I'm not that much interested in Los Angeles County.

There are isolated areas everywhere. It helps to know soil types because different soil types have different potentials for radon problems. The key is not to be an alarmist and knowing about radon by doing one's due diligence to help one's customers.

[Russel Ray]

Originally Posted by jpope

I would agree if this were a PT slab. If not, I wouldn't be concerned with what he has shown. . .

That size crack for new construction would concern me, PT or not. If it's 50 years old, different story. For new construction, that crack is much too big to be a common concrete curing/shrinkage crack. Of course, he did say "virtually," so maybe it's a 2004 house that was never finished because of the economy and is now being auctioned off.

[Jeffrey R. Jonas]

Originally Posted by rray

Not at all. The Us EPA map compares counties, and when comparing counties, San Diego County is the lowest, which also means that I'm not that much interested in Los Angeles County.

There are isolated areas everywhere. It helps to know soil types because different soil types have different potentials for radon problems. The key is not to be an alarmist and knowing about radon by doing one's due diligence to help one's customers.

I agree. When I was in SoCal, I lived in Simi Valley and Whittier. I remember Radon was a concern, even back then. But yes, those two areas are different than other areas of SoCal, due to the "hills", and "fault lines".

[Jeffery L. Haynes]

So those of you that are "concerned" with this one crack, albeit limited (no noted cracks else where especially the exterior).......pray tell what and to whom are you going to recommend?

[David E. Helm]

Looks like the kind of crack that comes from the concrete curing too fast.