Why Flashing Details Matter

How a Small Mistake Can Cost Homeowners Tens of Thousands

When it comes to home exteriors, the smallest details often make the biggest difference. Unfortunately, we were recently called out to a home where a simple oversight during construction turned into a major, costly problem for the homeowner.

The Problem: Missing Flashing at the Deck

When the house was originally built, the deck was installed tight against the siding. The issue? The builder never installed proper flashing—the thin, waterproof barrier that directs water away from the wall and keeps moisture from sneaking inside.

On the surface, everything looked fine for years. But behind the siding, rainwater was quietly finding its way into the wall cavity every time it stormed. Without a proper water exit strategy, the structure became a sponge. Over time, the damage spread:

• Rim joists and framing rotted out
• OSB sheathing deteriorated
• Insulation became saturated and mold-prone
• Interior drywall had to be ripped out and replaced

What could have been prevented with a few thousand dollars in flashing materials and labor ended up costing the homeowner tens of thousands in repairs.

Why Flashing Is So Important

Flashing may not be the most visible part of your home, but it’s one of the most critical. It works hand-in-hand with siding, roofing, and windows to create a path for water to escape rather than sneak inside. When it’s missing or installed incorrectly, the results are almost always the same: hidden leaks that eventually lead to major structural damage.

This isn’t just a one-off case. We see flashing mistakes regularly—whether on siding, decks, windows, or roofs. And because these failures are classified as workmanship issues, homeowner’s insurance typically won’t cover the cost of repairs. That leaves the homeowner footing the bill for something that could have been avoided with the right installation practices.

The Bigger Picture: Attention to Detail Saves Money

At Bo Lacey Construction, we stress the importance of attention to detail on every project. Flashing, sealants, and water management systems may seem like minor line items compared to the “big-ticket” materials like shingles or siding, but they are what protect those investments for decades to come.

A proper water exit strategy is about more than just code compliance—it’s about protecting your home, your finances, and your peace of mind.

Key Takeaways for Homeowners

• Don’t overlook the details: flashing and water management systems are essential, not optional.
• Choose a contractor who prioritizes workmanship and doesn’t cut corners.
• Preventative attention upfront costs a fraction of what repairs will later.

Your home is only as strong as the details you can’t see. Done right the first time, flashing ensures that rain stays where it belongs—outside your walls.