A slate sitting lower than the surrounding courses is easy to spot from a driveway. What you cannot see from that position is whether the stone fractured, its attachment failed, or several neighboring slates are loose. A useful repair proposal separates what the roofer observed from what still needs closer inspection.
Give the roofer a location they can find
Take a wide photograph from the ground showing the slope, then a zoomed view with a chimney, valley or window as a reference. Note whether a piece has fallen and whether you have seen an interior stain after rain. Keep clear of the area below loose material and leave roof access to a slate specialist.
Ask what can be retained
If the slate itself is sound, ask whether it can be reattached. If it is broken, ask how a replacement will match the existing dimensions, thickness and appearance. The U.S. General Services Administration’s slate roof repair guidance addresses both repair and reattachment on historic properties. It is a useful reference for the questions to ask, while the actual method depends on the roof and its condition.
Request photographs showing the affected area and the completed repair, plus a separate note identifying any broader defect. This keeps an isolated repair distinct from a recommendation for work elsewhere on the slope. If long service life was a reason for choosing the material, our overview of the benefits of slate roofing explains why the condition of the existing covering deserves attention.
