Roof-to-wall flashing detail at an asphalt shingle roof butting against continuous PBR metal panel siding is poorly sealed with multiple layers of sealant instead of a proper behind-siding flashing, causing leakage risk.

Existing solution (sealant) is a temporary workaround; no purpose-built product or standard method exists to retroactively flash this specific roof-wall intersection without cutting the siding.

Severity

4High

Willingness to Pay

implied

Added

Jun 11, 2026

Workarounds Described

multiple layers of sealant applied to fill gap

App Concept

FlashLink Retro-Flashing Kit

A pre-engineered flashing kit designed to seal roof-to-wall intersections against continuous metal siding without cutting the siding. Includes a flexible, custom-fit metal flashing with integrated sealant strips and a compression plate to bridge gaps up to 2 inches, eliminating the need for multiple sealant layers.

Key Features

Flexible, cut-to-length metal flashing with built-in sealant tape
Compression plate to secure flashing against uneven gaps
Corrosion-resistant fasteners and instructions for retrofit installation
Gap coverage from 0 to 2 inches without cutting siding

Target Users: Roofing contractors and builders working on asphalt shingle roof additions against PBR or corrugated metal siding, typically for residential or light commercial buildings.

Revenue Model: Sold at $49.99 per kit (flashing + compression plate) through roofing supply distributors and e-commerce, with optional bulk discounts for contractors.

Existing Solutions Mentioned

multiple layers of sealant

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