If you own a home in Central Ohio with an original slate roof, think some of the older neighborhoods in Bexley, German Village, Upper Arlington, Olde Towne East, or the historic districts around Granville… you’ve probably had at least one contractor tell you the same thing: “It’s easier to just tear it off and put on asphalt shingles.”
Easier for them, maybe. Not necessarily better for you.
Slate roofs have a reputation for being expensive and finicky, and we get why homeowners start looking at asphalt as the simple way out. But in most cases, repairing a slate roof is the smarter move financially, structurally, and for your home’s long-term value. Here’s why.
Slate Was Built to Outlast Everything Around It
A well-installed slate roof can last 75 to 150+ years, depending on the type of stone. Asphalt shingles, even the good architectural ones, are rated for 25 to 30 years under ideal conditions. That means a slate roof that’s already 60 or 80 years old and showing a few cracked or slipped tiles isn’t failing, it’s aging exactly the way it’s supposed to, with decades of life left if it’s maintained properly.
Swapping it for asphalt doesn’t upgrade your roof. It downgrades it. You’re trading a material with a century-plus lifespan for one you’ll likely replace two or three more times before your slate would have needed full replacement.
Most “Slate Problems” Are Actually Small, Fixable Issues
When we inspect an older slate roof, the vast majority of the time we find isolated problems, not systemic failure:
- A handful of cracked or slipped slates from age, foot traffic, or storm impact
- Failed flashing around chimneys, valleys, or skylights (flashing typically wears out long before the slate does)
- Nail sickness in a specific section, where the original fasteners have corroded
- Minor deck issues under one section rather than the whole roof
Every one of these is repairable without touching the rest of the roof. A skilled slate roofer can replace individual tiles, rebuild flashing details, and address a bad section while leaving the other 90%+ of your original roof completely intact. That’s a fundamentally different scope, and cost, than a full tear-off.
The Math Usually Favors Repair
Full roof replacement isn’t just about the new material. It’s tear-off labor, dumpster fees, decking inspection and repair, and full re-flashing, on top of the shingles themselves. A targeted slate repair addresses the actual problem area for a fraction of that cost, and you’re not paying to remove material that still had decades of useful life in it.
Zoom out further and asphalt starts looking even less attractive: over a 75-year window, a homeowner who repairs their slate as needed will likely spend less in total than one who replaces with asphalt every 25-ish years, tear-off and all. And that’s before accounting for the disruption of two or three additional full replacements.
Slate Repair Protects Curb Appeal and Home Value
Slate is part of the architectural character of the homes it’s on: steep-pitched Tudors, colonials, and other older Central Ohio housing stock were designed around it. Replacing that roof with asphalt shingles is a visible, permanent change to the house, and it’s one that buyers and appraisers in historic or established neighborhoods often notice. An intact, well-maintained slate roof is a selling point. A patched-together asphalt roof on a house that was clearly built for slate can read as a downgrade, even to buyers who don’t know the difference.
Why So Many Contractors Push Replacement Anyway
Slate repair is a specialty skill. It requires roofers who know how to walk a slate roof without damaging it, match tile types and colors, and rebuild flashing to the same standard as the original work. A lot of roofing companies simply don’t do this kind of work, so the easiest answer for them is to recommend a full tear-off to a material they install every day. That’s a staffing and skillset issue on their end, not a reflection of what’s actually best for your roof.
When Replacement Actually Does Make Sense
To be fair, there are situations where full slate replacement is the right call: widespread slate failure across the whole roof, significant structural deck damage, or a roof that was poorly repaired for decades with mismatched patches. But those are the exception, not the rule, and the only way to know which situation you’re in is a real inspection, not a guess from the ground.
Get an Honest Slate Inspection First
Before anyone tells you to replace a slate roof, get someone out who actually knows how to repair one. Roof Ohio is one of the few contractors in the Central Ohio area doing real slate roof installation and repair, and we’ll always tell you honestly whether your roof needs a full replacement or just targeted work.
If you’ve got an aging slate roof and you’re not sure what shape it’s really in, we’re happy to take a look and give you a straight answer.