Q&A: How do I determine if cracks in a new concrete pad are structural? What is contractor’s responsibility?
Question by Becky: How do I determine if cracks in a new concrete pad are structural? What is contractor’s responsibility?
No other cracks on property. Cracks in the area graded & built up, not tampted of a 40′x40′x4″ concrete slab floor of a metal building. Hairline cracks started in 3 months & are expanding. Have contacted the builder but they avoid me. The NE corner seems to be settling & cracking. If you place a long level on a crack you can see the concrete is dropping. How serious is this?
The sub-contractor that did the clearing & grading missed the location by 2′. The concrete sub-contractors had to move the forms by hand digging them. The footings are 2′ bigger. That is alot of concrete to shift. I have lost confidence in the grading contractor.
I believe that the northeast corner was not graded correctly and that corner is settling & cracking.
How far will it drop? How do I determine the extent of the damage? How do I have the problem corrected? Does it need to be redone or is it just cosmetic & a floor sealer would repair it? How do I negotiate with the contractor?
Are there control joints in the concrete?
Yes. The joints run down the middle north to south and east to west cutting it iinto quarters.
And it was ok’ed by the city inspector on 12/28/05
200 Set backs
204 Footings, forms and steel
208 Slab grade
However there is a section on the permit form concerning Grading and site work that was not checked.
100 Rough grading/building pad
104 Storm drain structures
108 Precise grade
199 FINAL GRADING
I assume that it was not needed as alot of lines were not written off.
Answer by Bren at RIT
If I were you, I’d start gathering evidence now so in the case that this becomes a major problem, you have some proof. Save all communications to the contractor. This may be their fault, and if it is, it may be their responsibility to fix it. take pictures. Copy all written documents. Tape record all phone conversations if possible. Save all emails. You may need to prove that you contacted them, and that you noticed the problem long ago if this ever becomes a problem.
Whether it is serious or not depends on where it is and what kind of building it is. On a sidewalk, probably not. In a parking garage, yes. Still, if their policy or warranty covers it, they will have to fix it regardless of how serious the issue is.
Hope I helped.
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