I have just gone into my attic and can see lots of beads of water on the underside of the roof on one side. It is very cold outside and snowing but I can’t see any obvious leaks. A quick internet search said it could be condensation though not noticed this problem before. It’s a 10 year old house. I want to know what the problem is and get it fixed as dripping onto my insulation and items in the attic. Thanks