Remove existing shingles to expose the roof deck. Ensure the surface is clean. 

Inspect for rotten or damaged wood and replace any compromised sections. 

Install a roof underlayment, starting from the bottom and working your way up. This acts as a moisture barrier under the metal panels.

Attach a drip edge along the roof edges to direct water away from the fascia. 

Ensure it runs along all eaves and gable ends for full protection against water damage. 

Begin by placing your first panel square at the edge of the roof. To ensure it’s square, measure the overhang and adjust as needed to align with the roof edge. 

Fasten the panel with exposed screws, placing screws on the flat part of the panel, avoiding the ribs. 

For overlapping panels, overlap the ribs by at least one rib width, and make sure the panels are straight and properly aligned before securing. 

Install trim pieces, such as the gable trim and eave trim, along the roof edges and corners to cover exposed ends of the metal panels. 

Use the appropriate fasteners to secure the trim.

Place the ridge cap over the peak of the roof, making sure it covers the top ends of the panels from both sides. 

Secure the ridge cap with screws, ensuring the overlap is correct and that it’s fastened tightly to prevent water ingress. 

Inspect all fasteners to make sure they’re properly tightened and that none are loose. 

Check the roof for any misaligned panels or gaps and adjust as needed. 

Ensure the ridge cap and trim are secure and that all seams are tight to prevent water from entering. Following these steps will ensure a secure and properly installed metal roof.