Can the 10 ft. SM-Rib Galvalume Steel 29-Gauge Roof/Siding Panel be installed over existing shingles?

We do not recommend installing our roof panel over shingles

We do not recommend installing our roof panel over shingles because if moisture and heat gets trapped in between the existing roof and metal roof, it can cause rot and mold. Please check your building codes to see if it is allowed in your area.