Tile roof leaks and metal roof leaks: different systems

A homeowner guide from Ellis Services

Tiled roofs: the covering and the layers below

Cracked or displaced tiles can expose the underlying layers. Ridge capping, bedding, pointing, valleys and flashing can also contribute to leaks. The tile profile matters when replacing tiles; a visually similar tile may not fit the existing system. Ask whether adjacent tiles and underlay can be assessed safely.

Metal roofs: joints, fixings and movement

Metal roofing includes sheets, fasteners, laps, flashings and penetrations. Deteriorated washers, incompatible metals, corrosion, damaged sheets or an unsuitable junction detail can create a water path. Roof expansion and contraction must be considered. A coating or bead of sealant cannot be assumed to correct every issue.

Junctions matter on both roof types

Chimneys, wall junctions, skylights, vents and other penetrations need suitable flashing. Water may enter at a junction and travel before it is visible indoors. Check the junction as part of the diagnosis instead of focusing only on the covering near a ceiling stain.

Prepare an enquiry without a diagnosis

If you are unsure of the roof type, say so. A safe ground-level photograph and a description of the leak pattern are more useful than an unsafe close-up. Mention any recent work that may have affected the roof.

Ask for the repair boundary, not just a product name

For tiles, ask which broken tiles, ridges or adjoining details are included and whether compatible replacements are available. For metal roofing, ask which sheets, fixings, laps or penetrations are involved. With either system, a leak close to a wall or skylight can need a junction assessment. The quote should distinguish replacing a failed component from applying a surface treatment, and state what remains to be investigated.

Related services

Official sources for further reading