For glue down to come up like that even with a light misting (pre-spray?)would tell me that the carpet has had it's day. On the other hand if glue down dose that from cleaning clearly shows that the glue has clearly broke down over the years.
keep cleaning enough, Mardie, and you stumble onto some that are like new and will buckle on the first cleaning with light mist of pre-spray
So regardless of the cause the most probable reason the carpet looks like it is coming up is because as you clean it the vacuum is sucking on the carpet and as the vacuum is sucking it is creating air pockets under the carpet.
did they teach you that in Racine Wi?
This is common with loose carpet and it will lay back down after 24 Hrs.When this happens to me i tell the client that the carpet is loose and the power of the vacuum has pulled has pulled air under the carpet and that it will lay back down after 24 Hrs. It always dose and never had a problem. I am low moister and do not make the backing wet so that says it is not a water related issue.
dead wrong ..it IS a "moisture" related issue more often than not .
Like I said, it will happen to some carpets (that are in great shape and fairly new) with a light pre-spray misting .
I've even some in kitchens that will start to buckle on humid days .
It's almost always the installation that's the "real" cause .....any "moisture" just makes the poor install manifest it's self .
Unfortunately, the owner doesn't have a clue about this stuff ...to them, "we" caused it
The first time this happened to me i almost shit myself.It was pad under on long hallways and it looked like ocean waves.
yea..i think we've all frEEked and panicked the first time it happens
..L.T.A.