We installed Certain Teed Ceder Impressions siding on a house and now, a year later, we are noticing problems with it. On the side of the house that is in the sun the most, the siding is losing its finish and separating. We followed the temperature lines on the siding and don't know why this is happening. We have called Certain Teed about it and it has been 3 weeks and nobody has been out here to look at it yet. I have noticed others having trouble with Certain Teed siding and I was wondering if anybody has had this same problem we are having. Please, any advice or proof that this has happened to others would be appreciated. Thank you!!