My condo unit was flooded with water by a neighbouring unit. Property management sent in a team to remove all my damaged laminate floors and drywall. Many months later, I had all my laminate floors removed and replaced with new engineered hardwood floors as of summer 2013.

Lately, I've been seeing parts of my floor start to "bubble up". I don't know how else to describe it other than swelling or warping or something. It's happening throughout my unit in many different spots. I've included some photos of the bubbling.

http://imgur.com/a/M5cRf

Since these floors are new, can anyone tell me what's going on and why? I didn't have any problems with my laminate floor and was very surprised to see it happening to my current floor now.

Thanks all.

Looks to me like your wet mopping it. Definitely water damage.

Actually, I haven't moved into my unit yet since the new floors were installed. Could it be dry cupping or is it possible there's still moisture in the concrete underneath?

looks like some delamination is occurring..I would say there is still a moisture condition.

if the laminate wasn't removed right away during the demo it may have trapped moisture underneath in the foam.
The material itself is non porous and would just lock it in I imagine.

if they removed the laminate then installed new right away without further moisture testing its possible this can be your problem.

moisture meters may begin to tell you

Thats not dry cupping, it is moisture trying to get out. Now where's my hammer probe.

I took another photo of one board's corner popping up. Is this a sign of the floor delaminating?

http://imgur.com/a/74kXe

Looks like delam to me.

That's pretty wild looking delamination. Cupping from excessive moisture would usually look different than that . This delamination is likely due to two factors, the moisture that is underneath and the lack of quality in the flooring itself. Although I can't say that for certain.

But we've seen many engineered horror stories and the products usually originated from Asian sources.

Just finished testing concrete slab that was flooded. New floor showing slight cupping in some areas. Put an RH probe in the concrete December read 85% RH. Tested yesterday now 55.8%. Have a board removed and test concrete. In all likelihood concrete was not dry enough. Don't wait too long or it may correct itself. Your pictures are consistent with too high moisture from concrete.

Last picks look like delam to me as well. Looks like the top two plys seperating.

Obviously no one bothered to check the substrates moisture content wether it be wood or concrete prior to installation. I've had many fire/water damage restoration companys tell me the substrate was good to go when it was not.

If the laminate had a vapor retarder under it that may have held the moisture under it to an acceptable level in which the floor was not adversely affected. Seen it on concrete many times.