I have a newly completed (Aug 05) home with porches (poured last) where I have concrete dusting I cannot get rid of. I have swept it and washed it, and the dust never goes away.
Suggestions ???

They should ahve applied a hardener/sealer to the concrete as it was poured. Maybe there's one you can apply now, otherwise the dust will continue forever.

Concrete 'dusting' indicates faulty concrete or concrete finishing.

It usually occurs in cold weather mixes when calcium or other additives are included in the mix to prevent freezing, but it can also occur when concrete is poured in bad weather conditions such as rain.

Based on the time of year the concrete was poured, I'd think it likely the concrete was poured in rain and the top layer has failed to properly set.

One solution is to have your builder remove and replace the defective concrete.

It should be done at his expense and under your new home warranty.

Some other 'fixes' might be possible but can be just as expensive as jackhammering out the concrete and replacing it. These include adding 'hardening' chemicals or sealers as Rich Hetzel or having the concrete surface ground.

Here is a helpful link:

http://www.lmcc.com/qa-archive.asp?id=56

The bottom line is this is a defect that is the builder's responsibility to correct.

Call him with your concerns and if he balks have your attorney defend your rights.

THANKS FOR YOUR SUGGESTIONS... MY REACTION WAS IT HAD TO BE THE BUILDER'S SCREWUP....ESPECIALLY SINCE THE PORCH LOOKS LIKE A SPIDERWEB WITH ALL THE CRACKING....

i APPRECIATE YOUR INFORMATION, GUYS !