Roof leak detection
Finding where the water actually gets in
Tile roofs leak at slipped or cracked tiles, at failed underlayment, and at the mortar bedding on ridges and hips. The tiles themselves often outlast the underlayment beneath them by decades, which means a tile roof can look perfect and still leak — the failure is in a layer you cannot see. Repair needs someone who knows how to walk tile without cracking more of it, which is the single biggest cause of damage on these roofs.
Pontiac gets the full range — freeze-thaw cycling through winter, severe convective storms with hail and straight-line wind in spring and summer, and enough temperature swing between them to work every joint on the roof loose. Freeze-thaw is the quiet one: water finds a hairline gap in flashing, freezes overnight, expands, and opens it slightly wider, repeating through a Livingston County winter until a joint that was watertight in October is leaking by March. Spring brings the loud damage, and derechos have put straight-line wind through this region at speeds that take ridge caps and whole shingle courses. Housing stock here is older than average, which means a lot of roofs where the flashing has already been through several decades of that cycle.
Pontiac has a population of about 11,150, and the housing stock here sets the pattern for what fails first on a roof.
On a tile roof the waterproof layer is the underlayment, not the tile — the tile sheds the bulk of the water and protects what is underneath. Underlayment typically fails decades before the tile, so an intact-looking roof leaking is the normal presentation.
Often, including salvaged stock for discontinued profiles. Where it genuinely cannot be matched, tiles are usually taken from a less visible elevation and the replacements put there instead.
Finding where the water actually gets in
Stains, bulges and damp patches inside
Cracked rubber collars around pipes
The sheathing under the shingles
The secondary barrier under the covering
Natural slate, repaired not replaced
You will get a straight answer on whether Pontiac needs someone out today or whether it can wait — before anyone quotes you for anything.
Call (706) 696-1888