I would like to know if a roof will support the weight of a cement roof 1000lbs per square? house was built around early 80’s in CA has 2X4 construction.
Time for you to hire a structural engineer. HE would be able to take your measurements, and measure the load bearing capacities and then tell you no.
Does not sound like I would risk it.
maybe a couple a hundred pounds per sq.
but a thousand? i dont see it happenin.