Installing Solar Panels on a Tile Roof: Step‑by‑Step Guide

Prepare the Roof and Gather Materials

Before any cutting, inspect the tile roof for damage and ensure tiles are intact. Mark a grid 4‑6 inches apart on the tiles, matching the mounting hardware layout. Gather a racking system designed for tile roofs, waterproof flashing, sealant, mounting brackets, and a drill with masonry bits.

Choose a Mounting System Suited for Tiles

Fixed‑tilt, adjustable‑tilt, and micro‑inverter mounts all work on tile roofs, but a semi‑fixed, tile‑compatible rack reduces tile movement. Ensure the rack's weight is within the roof's load capacity, usually 20–30 lb per square foot for tile.

Install Flashing and Sealant

Place a waterproof flashing strip beneath each bracket to channel water away. Apply a bead of roof sealant around the mounting points, then let it cure for 24 hours before proceeding.

Mount the Racking System

Attach brackets to the flashing, tightening bolts with a torque wrench to manufacturer specs. Use spacer blocks to keep the panels level and avoid tile distortion. Verify each bracket is level before adding the next.

Attach Solar Panels and Secure Wiring

Slide the panels onto the racking arms, then secure them with mounting clamps. Run the DC cables through the roof, using conduit or cable glands to prevent leaks. Ground the system per local code and connect to the inverter.

Final Checks and Inspection

Inspect for leaks around flashing, confirm panels are firmly attached, and verify the inverter shows correct power output. Schedule a professional roof inspection if uncertain.