When Brian stepped onto this roof in Newport News, he wasn't just looking at a repair; he was looking at a piece of Virginia history. This Vermont slate has been protecting this home for 104 years. Think about that—this roof was installed just after World War I and has stood firm through a century of Tidewater humidity, Nor'easters, and scorching summer sun. But even the most "forever" materials eventually need a little neighborly TLC when the underlying structure starts to feel its age.

The Problem: When Valleys Give Way

The issue Brian found wasn't actually with the slate itself—Vermont slate is famous for its durability—but with the "valley." In roofing, a valley is the internal angle where two roof slopes meet. It’s essentially a highway for rainwater. Over 104 years, the old metal flashing (the waterproof barrier in that fold) had finally worn down, allowing water to seep underneath. This led to a section of rotten wood decking at the very bottom, where the water collects before hitting the gutters.

The Technical Why: The Longevity of Slate vs. Metal

While slate can last well over a century, the components around it often have a shorter lifespan. In our coastal climate, salt air and constant moisture can eventually corrode older valley flashings. When that barrier fails, the wood "decking"—the structural plywood or timber boards your roof sits on—soaks up that water like a sponge. If you don't catch it, that rot can spread to the rafters, turning a simple maintenance "tune-up" into a much larger structural headache.

Professional Advice: Respecting the Antique

If you’re lucky enough to own a historic home with a slate roof, the best thing you can do is have a professional "eye" on it every few years.

  • Don't ignore the valleys: These are the most vulnerable spots on any roof, especially historic ones.

  • Look for "Shedding": If you see pieces of slate in your yard or gutters, it’s a sign the fasteners or the slate itself are ready for repair.

  • Check the Decking: If you notice sagging in the roof line or soft spots, it’s a sign that water has moved past the slate and is eating away at the wood underneath.

Watching a roof reach its 104th birthday is a reminder of why we do things the right way the first time. Whether your roof is a century old or just a decade in, keeping it bone-dry is our top priority. 

You can see more tips in action on our Roofing for Reel Series. 

If you’ve noticed a mystery spot on your ceiling or you’re worried that your older roof might be hiding some rot under the surface, we’re here to help. Give the team a shout at 757-867-6600 or simply fill out the contact form right here on this page. We’re happy to stop by and give your home an honest look.