Every slate on a roof overlaps other slates and is therefore angled and fragile see photo above.
Roof slates creaking.
New build house 18 months old.
Applying the right lubricant and replacing cracked or weak pieces of wood will prevent the slats from squeaking underneath the pressure of your mattress.
How to fix slate tile flooring.
Loose stales are more often the result of the fixing nails failing usually.
Even the sturdiest floors sometimes require maintenance and repair and slate is no exception.
Damaged slates are usually due to the roof settling frost or wind damage or things falling onto them this could be.
However time and weather will leave their mark on a slate roof and slates can become damaged or loose.
The wood frame under your roof experiences temperature changes from the outdoor air because the attic does not receive much heating or air conditioning.
The builder has brought in the roofing contractor who seems to have no idea what is causing it.
With ordinary foot traffic slate can loosen or lift and hard.
At night the outdoor temperature lowers and the wood contracts.
During the day the wood expands.
When walked on there is a good chance that the slate will crack and the bottom part of the slate will fall out see photos below.
Creaking noise from roof when windy and intermittent cracking noise.