There are 9 windows, profile Rehau Deling 70 mm, size – 1100h1400, the top of a deaf transom, 2 opening sashes and shutters. 5 windows are in the frame half of the house, 4 windows – in the half built from a beam.
Here is a problem with three of the four of these windows – when the sun hits them, and at night when it cools down there is a strong snap. Well, if you dozed off and the window made a "click" at the same time, the sleep is gone. Open or closed sash – it does not matter, I thought maybe the fasteners interfere, unscrewed all the screws (except the top), the result is zero. No trim inside, polished beam.
Anyone have any thoughts on this mess?