You can avoid overweight fees (and other headaches). Smart contractors “measure twice and cut once”. The same idea applies to loading your rolloff. One material that plays tricks on you is concrete. A 20-yard dumpsters with 2-yards of concrete is only 10% full, but likely 100% of your weight capacity. Know the weight before loading. Get our chart for weight of trash by material type, roofing estimates, and alternative solutions for heavy materials.