Depending on your type of roof and what it is used for it may be required to hold more weight.
Roof support weight.
How much weight can my home s roof support.
Tpo roof membrane 60 mil fully adhered membrane only 0 29 lbs.
Concentrated weight means that this load is placed directly on a single area on the roof.
Thatch approximate typical weight 7 lbs.
When completely healthy and showing no signs of wear and tear a concrete roof can safely support around 1 200 pounds 0 54 t per square foot.
Typical loads if the bottom chord of a roof truss functions as a floor joist such as in an attic room it carries a live load that also varies by use but a typical live floor load for a residential space is about 40 pounds per square foot.
A good estimate when considering a commercial flat roof is that it should be able to support a 300lb hvac unit in a single 2 5 2 5ft space.
Per those guidelines an ordinary roof on a home needs to hold 20 pounds per square foot at absolute minimum.
Tpo roof membrane 80 mil fully adhered membrane only 0 40 lbs.
Wood fiberboard insulation cover board.
Likewise how much weight can roof trusses support.