Expert UK double mattress retailers Mattress Time recommend that a mattress should be changed every five to seven years. However, this is only an estimate and the person that sleeps on the mattress every night will be in the best position to judge whether it needs replacing within this time frame, or before or after this amount of time has passed.
If the mattress starts to feel uncomfortable when a person is lying on it, this could be a sign that it needs to be replaced. A person should not feel any discomfort when lying down on the mattress. When waking in the morning a person should not feel pain in their back or experience a tingling sensation in their arms or legs.
Another sign that a mattress needs to be replaced is if there are dips in the mattress or if it is starting to sag in places. If a person sits down on the mattress it should be able to support their weight without them feeling as if they are sinking.
There are many factors that can affect the length of time a mattress can be used for such as a persons sleeping habits and how much they move about in the night. If a person starts to notice any of the signs that have been discussed above then it is probably time to consider a new mattress, even if they have not had their existing one for five years.