My new build house has rustling and creaking noises coming from the eaves area when it is windy and this can be heard in the bedrooms and is intrusive. The national housebuilder have done bits and pieces in the loft such as properly secure loose timbers and tape the overlapping edges of the roof felt, but this has had no effect and they now say they can do no more. They have not sent a surveyor or Civil engineer to look at the roof and they have not actually looked properly at the eaves from inside and out. I have attached 2 photos - is this how the eaves area should look - any idea what the white plastic is for? Any help greatly appreciated.