Hi l had a new shower base and screen installed 2 months ago due to minor water damage on the wooden subfloor which has been repaied. Past 2 weeks l noticed a slight creaking noise when l step on both the base and the bathroom floor near the base , it sounds like its coming from either the back of the base or inside the bottom of the wall behind the base. l didnt have the noise for the first two months after it was installed only started past 2 weeks, could it be possibly due to the change to cold weather or could it be something more serious l should get checked