Cracking and popping noises in roof and walls

I presume you have a Colorbond roof. The roofing material expands and contracts with temperature, and that's likely what is causing the popping and cracking sounds. Ours does it all the time. There is plenty of flexibility up there and I don’t think you have anything to worry about.

I've never owned a new house with a tile roof so can’t say for sure, but it is possible it’s the same thing. Even more flexibility with tile roofs as the tiles generally aren’t tightly fixed to each other. Perhaps someone with a new tile roof can comment more definitively than me. Perhaps try and note if the sounds get worse as the sun shines directly on the roof. I notice it most on partly cloudy days, as the sun comes in an out of the shade of the clouds.

structuralBIMGuy do you have any advice on this?

Generally a home well built should not have cracking and popping noises. It could be thermal expansion but more likely foundation movement . What is your site soil classification?

I am not sure about the soil classification. How do I get it? I also noticed today the noise are coming both from roof and aluminium windows and more prominent during mornings and evenings. Does it fit more into the criteria of thermal expansion?