What to do - IG failing like an Epidemic
Our 14 year old house in the northeast has 61 windows with IG and 3 french door with IG. The windows are mostly double hung with some casements as well. The wood windows and doors are from Pozzi which is now part of Jeld-Wen. Within the 10 year warranty period on the glass, Pozzi replaced 3 or 4 IG units which had failed. Now at year 14 I notice 14 more IGU's which are fogged or have huge amounts of condensation within the IGU.
Pozzi has provided very good customer service to date in spite of our problems. For example, one of our windows rotted out, after the warranty period. The field person Pozzi sent really couldn't figure out a root cause for the failure. Pozzi sold and shipped a new window at a 50% discount.
Now they are offering the same deal on glass replacements for our failed IGU's (excluding labor). They agree that the failure rate we are seeing is way above their average for windows of that vintage. I expect we haven't seen the last of these types of failures either.
What is a reasonable expectation for IGU failure rates? Other than the IGU failures, the windows are otherwise in pretty good shape (new weatherstipping is probably in order at this point as well). I do notice that the one new Pozzi window we have does seal tighter and have better glass performance than our older units. Is replacing the glass the right thing to do, or would it make more sense to take more drastic action?