Roofing · Clifton

Roofing in Clifton: Why the Flashing Matters More Than the Shingles

Clifton's older housing stock — largely built before 1940 — means the roofs here are not straightforward rectangles. Steep pitches, multiple dormers, chimneys, and intersecting roof planes define the neighborhood. That complexity shifts where failures actually occur. On these roofs, the shingles themselves rarely fail first. The flashing does.

Where Older Roofs Leak

Flashing is the thin metal that seals every joint where a roof meets something else: a chimney, a dormer wall, a valley where two planes converge, a skylight curb. On a simple modern roof there is not much of it. On a pre-1940 Clifton roof there is a great deal — and every inch is a potential failure point.

Step flashing (the L-shaped pieces that run up a wall or dormer) can separate over decades of thermal cycling. Chimney counter-flashing can pull away from deteriorating mortar. Valley flashing installed in an earlier era may be the original lead or galvanized steel, long past its service life. The shingles on the main field may look adequate while water has been traveling behind compromised flashing for years, rotting the decking beneath.

What a Thorough Job Looks Like Here

A quality roofing job on an older Clifton property is heavier on labor and detail work than a comparable square footage on a newer, simpler structure. The things that matter:

• Full flashing replacement, not reuse. Re-roofing over old flashing is a shortcut that will surface as a callback within a few seasons. Every piece of step, counter, and valley flashing should come out and be replaced with new material.
• Chimney inspection before new flashing is set. Mortar joints and brick faces should be evaluated so the new counter-flashing has sound material to anchor into. Flashing set into deteriorating mortar fails early.
• Decking assessment once tear-off begins. Water behind failed flashing causes rot that is invisible from the exterior. The scope of decking repair should be confirmed after the old roof is off, not estimated blindly beforehand.
• Proper dormer head and sidewall flashing sequences. Dormers require layered flashing details that must be integrated with the shingle installation in a specific order. Rushing this step is where leaks originate on complex roofs.

Questions Worth Asking Any Contractor

Before you commit, it is worth asking directly:

• Will all existing flashing be replaced, or reused where it looks intact?
• How will chimney mortar condition be evaluated before counter-flashing is set?
• What is the process if rotted decking is found after tear-off begins — who decides the scope, and how is that documented?
• Who will be on the roof doing the flashing work, and is that the same crew doing the shingle installation?

The answers tell you whether a contractor understands the particular demands of older residential roofing or is pricing the job as if every roof is the same.

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